https://archlinuxarm.org/forum/viewtopic.php?f=15&t=14716&p=64407#p64407

At the moment, the "Terminal" functionality is a simple non-privileged shell. While this cannot be accessed without first authenticating to PiKVM and requires su - and a password to access full terminal functionality, there is a bug with the login program that ships with Arch Linux ARM in util-linux-2.36-2 preventing ttyd from being used with login directly.

I've documented two workarounds in the Arch Linux ARM bug reporting forum:

1. Use strace ttyd login instead of ttyd login in the systemd unit file or
2. Copy the login command from Raspbian for armv7l (32-bit) to /usr/local/bin/ and use that version with kvmd

I'm testing the workaround without copying the foreign login binary from Raspbian using the first option. It's not perfect, here's what I'm presently seeing with the workaround in-place:

1. The terminal may fail to respond on initial boot
2. After systemctl restart kvmd-webterm, the login: prompt seems to be consumed on initial connection and only the password: prompt appears.

At present I don't recommend using this workaround if you need the terminal functionality and the current authentication options are sufficient. Here is my copy of /etc/systemd/system/multi-user.target.wants/kvmd-webterm.service I'm currently using, note that login requires root privilege to manage the session properly:

[Unit]
Description=Pi-KVM - Web terminal (ttyd)
After=network.target

[Service]
ExecStart=/usr/bin/strace /usr/bin/ttyd --interface=/run/kvmd/ttyd.sock --port=0 /usr/bin/login 2>/dev/null
Type=simple
Restart=always
User=root
Group=root

ExecStartPost=/bin/bash -c 'sleep 3; chmod 660 /run/kvmd/ttyd.sock; chown kvmd-webterm:kvmd-webterm /run/kvmd/ttyd.sock'

[Install]
WantedBy=multi-user.target

Tiny feature request: Option to close stream window. There's already an option to bring the window back but none to close it. I don't have a HDMI to CSI-2 bridge as of now but still testing pikvm while waiting for delivery. As I'm doing it on the same machine I regularly move my mouse around while hitting the edges of the stream window.

nice to have; low priority

• System and / or pikvm component update through web interface
• pikvm restart (system and / or daemon) via web interface
• update alias (.bashrc) or bash script similar to /usr/local/bin/rw to install the latest updates via pacman

Fyi, there is a link missing and the kvmd-webterm service cannot be started:

[root@pikvm ~]# systemctl status kvmd-webterm
* kvmd-webterm.service - Pi-KVM - Web terminal (ttyd)
     Loaded: loaded (/usr/lib/systemd/system/kvmd-webterm.service; enabled; vendor preset: disabled)
     Active: failed (Result: exit-code) since Sat 2020-04-25 01:53:57 CEST; 47s ago
    Process: 327 ExecStart=/usr/bin/ttyd --interface=/run/kvmd/ttyd.sock --port=0 /bin/bash -c echo -ne "0;Pi-KVM Terminal: `hostname -f` (ttyd)^G"; cat /etc/motd; bash (co>
    Process: 328 ExecStartPost=/bin/bash -c sleep 3; chmod 660 /run/kvmd/ttyd.sock (code=exited, status=1/FAILURE)
   Main PID: 327 (code=exited, status=127)

Apr 25 01:53:54 pikvm.domain systemd[1]: Starting Pi-KVM - Web terminal (ttyd)...
Apr 25 01:53:54 pikvm.domain ttyd[327]: /usr/bin/ttyd: error while loading shared libraries: libjson-c.so.4: cannot open shared object file: No such file o>
Apr 25 01:53:54 pikvm.domain systemd[1]: kvmd-webterm.service: Main process exited, code=exited, status=127/n/a
Apr 25 01:53:57 pikvm.domain systemd[1]: kvmd-webterm.service: Control process exited, code=exited, status=1/FAILURE
Apr 25 01:53:57 pikvm.domain systemd[1]: kvmd-webterm.service: Failed with result 'exit-code'.
Apr 25 01:53:57 pikvm.domain systemd[1]: Failed to start Pi-KVM - Web terminal (ttyd).

Adding the link will solve the problem:

[root@pikvm lib]# rw
[root@pikvm lib]# ls -al  libjson*
lrwxrwxrwx 1 root root    18 May  5  2020 libjson-c.so -> libjson-c.so.4.0.0
-rwxr-xr-x 1 root root 54780 Apr 30  2020 libjson-c.so.4.0.0
lrwxrwxrwx 1 root root    18 May  5  2020 libjson-c.so.5 -> libjson-c.so.5.0.0
-rwxr-xr-x 1 root root 54780 Apr 30  2020 libjson-c.so.5.0.0
[root@pikvm lib]# ln -s /usr/lib/libjson-c.so.4.0.0 /usr/lib/libjson-c.so.4
[root@pikvm lib]# ls -al  libjson*
lrwxrwxrwx 1 root root    18 May  5  2020 libjson-c.so -> libjson-c.so.4.0.0
lrwxrwxrwx 1 root root    27 Apr 25 01:57 libjson-c.so.4 -> /usr/lib/libjson-c.so.4.0.0
-rwxr-xr-x 1 root root 54780 Apr 30  2020 libjson-c.so.4.0.0
lrwxrwxrwx 1 root root    18 May  5  2020 libjson-c.so.5 -> libjson-c.so.5.0.0
-rwxr-xr-x 1 root root 54780 Apr 30  2020 libjson-c.so.5.0.0
[root@pikvm lib]# systemctl start kvmd-webterm
[root@pikvm lib]# ro

Hi,

I'm trying to compile the image and received the following error:

Step 26/73 : RUN pacman-key --keyserver pgp.mit.edu -r 912C773ABBD1B584 && pacman-key --lsign-key 912C773ABBD1B584 && echo -e "\n[pikvm]" >> /etc/pacman.conf && case "$BOARD" in zero|zerow) echo "Server = https://pikvm.org/repos/rpi" >> /etc/pacman.conf;; *) echo "Server = https://pikvm.org/repos/$BOARD" >> /etc/pacman.conf;; esac && echo "SigLevel = Required DatabaseOptional" >> /etc/pacman.conf
---> Running in e505b452212b
gpg: keyserver receive failed: No keyserver available
==> ERROR: Remote key not fetched correctly from keyserver.
The command '/bin/sh -c pacman-key --keyserver pgp.mit.edu -r 912C773ABBD1B584 && pacman-key --lsign-key 912C773ABBD1B584 && echo -e "\n[pikvm]" >> /etc/pacman.conf && case "$BOARD" in zero|zerow) echo "Server = https://pikvm.org/repos/rpi" >> /etc/pacman.conf;; *) echo "Server = https://pikvm.org/repos/$BOARD" >> /etc/pacman.conf;; esac && echo "SigLevel = Required DatabaseOptional" >> /etc/pacman.conf' returned a non-zero code: 1
make[1]: *** [Makefile:208: os] Error 1

What I'm doing wrong? Please help!

Regards,
Slava

Dear,

I'm trying to build an image for my RPI2 + HDMI CSI Hardware.
I followed instructions in building_os.md but build fails:

`Step 21/77 : RUN gcc -fPIC -shared -o /usr/local/lib/libpreload-semop.so /tmp/semop-wrapper.c
---> Running in 5cfe33b6374d

Allocating guest commpage: Operation not permitted

The command '/bin/sh -c gcc -fPIC -shared -o /usr/local/lib/libpreload-semop.so /tmp/semop-wrapper.c' returned a non-zero code: 1

make[1]: *** [Makefile:209 : os] Erreur 1
make[1] : on quitte le répertoire « /home/tsos/os/.pi-builder »
make: *** [Makefile:53 : os] Erreur 2
`

Freshly installed Ubuntu 20.04 server in a Virtualbox VM ( macos host)

Please help !
Etienne

Hi,
In documentation there is a sentence about requirements "RPi4 with 2Gb RAM is pretty enough". "Pretty enogh" would suggest that this is even more then you need and possibly 1GB would fit here too. Is it that right or 2GB version should be secure minimum for this software?

Thanks in advance

can i build pikvm for board orange pi pc2

Hi,

I found out about your project the last couple of days and I'm highly motivated to realize this for my own server at home!

In order to setup the whole as clean as possible I want to design a PCB, which will take one PCI slot (without connecting to PCI ofc) of the case and offers a generic connector for the ATX control and LEDs. However, the schematic breadboard design is not hinting any possibility of further using remaining buttons and LEDs of the case.

Out of my (current) understanding, it should be done by simply wiring the buttons and LEDs to the respective parts of the optocopplers. The resistor at Pin 1 of the LED optocopplers has to be adapted probably in order to permit enough current, I guess?

My question (tl;dr): Can you give some hints on how to further use remaining buttons/LEDs of the case?

Anyway thank you in advance for this neat project!

Hi There,

As discussed in Discord, I have the following setup with a pikvm (Pi4, B101) with HDMI and USB connected to a 4 port Hardware HDMI KVM switch. The Hardware KVM then connects to 2 physical hosts.

DELL Keyboard (physical, USB)---------------|
                                            |
                                            V   	       ---> Host 1 (HDMI and USB)
Pivkm (Pi4,B101, HDMI + USBC) ---> Hardware HDMI KVM Switch ---|
							       ---> Host 2 (HDMI and USB)

When I manually switch the input host (either on the Hardware KVM itself or with a physical Dell Keyboard plugged into the Hardware KVM) between Host 1 and Host 2, this works fine and pikvm streams the HDMI output from Host 1 / 2 as expected. The pikvm keyboard also sends the usual keyboard signals to the selected host.

When using the Dell physical USB keyboard attached to the hardware KVM, I can use the following "hotkey sequences" and the Hardware KVM responds as expected:

CTRL (wait < 5 secs), CTRL - Cycles between connected Hosts 1 and 2
CTRL+SHIFT+1 - Changes to Input Host 1
CTRL+SHIFT+2 - Changes to Input Host 2

The issue is that, while I can send normal keystrokes fine with pikvm/virtual keyboard, the above "hotkey sequences" are not picked up by the Hardware KVM when sent via pikvm?

As requested on Discord, here's the output of the usbhid-dump -s BUS:DEVICE command for the Dell Keyboard when:

(A) Run on Host 2 with the Dell Keyboard connected directly to Host 2
(B) Run on Host 2 with the Dell Keyboard connected via the Hardware KVM Switch

Thanks for taking the time to look into this!

(A) usbhid-dump-host2-direct-connect-001-005.txt
(B) usbhid-dump-host2-via_KVM_switch-001-007.txt

decompression is done by etcher itself - ne need to decompress before flashing ;)

RPi4 only: since it uses one USB-C female connector to giving power and keyboard/mouse/drive emulation you also need to make a special cable to split DATA and POWER lines from USB-C. You can make it from two suitable connecting cables, or solder from scratch. Be sure to check the circuit diagram, otherwise you may damage your devices. Pinout specific used connectors you can easily find on request "USB pinout" in Google. Please note that if you will make a cable based on the two factory ones, the colors of the wires may not match those shown in the picture. Use a multimeter to make sure the connections are correct.

Why do you recommend splitting the cable? On a lot of PCs you can set that USB ports get always power even in OFF state. You can set that in BIOS. So I just want to understand the background of your advice.

With a good quality USB-C cable connected to a USB3.0 Port it provides even enough power that the PI doesn't print its undervolted message.
If power shouldn't be sufficient I would recomment using backpowering USB-A to USB-A cable. It is not possible to power it this way, but only to give it additional power. Even my RPI4 gets enough power via the PC USB3.0 connection it still draws 270 mA (=1,35W) when using backpower.

It works so smooth, just install, connect and you're ready. Splitting the cable is a effort you can easily avoid that way.

DarkSide on Discord reported the following issue with the login page on mobile phone / tablet:

just upgraded and now it is not possible to type user or password from web browser on tablet/smartphone. It doesn't even open the soft keyboard. I didn't tried with last updates, so i cannot figure if is an issue from this last update or from any of the last ones.

I can reproduce this on my android smartphone, Windows 10 with Firefox and Windows 8.1 with Firefox / Chrome.

If you load the login page and just type (on PC) you can login with no problems. If you happen to click on the username or password field it looses focus and you can't enter either of the fields again reliably. Did some digging (with my very limited Javascript skills) and saw that kvmd/web/share/js/wm.js line 260 seems to grab the focus immediately when you click into any of the fields.

Would it be possible to boot this using Network Boot?

https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/net_tutorial.md

I am not confident in my Arch expertise, mostly CentOS, OmniOS, and Windows here. I've setup EFI Boot before with those systems. I'm sure I could, but I was curios if there are any Arch specific instructions that you could guide me on, and if I had issues I could report back here to debug it with you.

https://github.com/pikvm/pikvm/blob/master/v2.png
https://github.com/pikvm/pikvm/blob/master/v0.png

Should be Motherboard instead of Moterboard

This is a feature request to be able to capture/record the video stream to a file on a SMB share. This might already be possible using VNC and VideoLAN, but it would be nice to have a "record" button in the UI with a dialog choosing where to save the video to a file server using SMB)

The /var/lib/kvmd/msd turns to read-only during upload of an image and the upload breaks.

Here the dmesg:

[ 60.115347] EXT4-fs (mmcblk0p3): re-mounted. Opts: errors=remount-ro,data=journal

Hi,
I'm trying to compile OS on Windows subsystem for Linux and receiving the following error during installation:

~$ sudo sh get-docker.sh
# Executing docker install script, commit: f45d7c11389849ff46a6b4d94e0dd1ffebca32c1
+ sh -c apt-get update -qq >/dev/null
+ sh -c DEBIAN_FRONTEND=noninteractive apt-get install -y -qq apt-transport-https ca-certificates curl >/dev/null
+ sh -c curl -fsSL "https://download.docker.com/linux/ubuntu/gpg" | apt-key add -qq - >/dev/null
Warning: apt-key output should not be parsed (stdout is not a terminal)
curl: (7) Failed to connect to download.docker.com port 443: Connection refused
gpg: no valid OpenPGP data found.

What should I do to fix this issue?

Thanks!
Slava

When using a wrong username and / or password the login page will display "Invalid username or password" as expected.
But if the username is known but has the wrong capitalization a different error message in plain json is displayed:

In this example I used "Admin" instead of "admin".

First off: Awesome project. From what I've read this is exactly what I was looking for.

Do you have any plans on implementing access to pikvm over the internet? I was thinking of something like an automatic VPN connection once a network with internet access is detected or a server that pikvm is connecting to that provided the access (similar to what TeamViewer does).
My idea is to ship this to friends / family, let them hook it up to the PC / laptop and get access to their machine without having the trouble of any port forwarding.

I noticed two things while playing around with the mass storage mount feature.

1. When first connected to my computer pikvm provided a "Linux File-CD Gadget USB Device" device listed as a DVD/CD-Rom drive. After playing around with mounting / unmounting 2 images I disconnected the USB cable between pikvm and my computer. After reconnecting pikvm provided the same device name but the type changed from DVD drive to Disk drive. The drive mode will always be the last one I choose before disconnecting the USB cable but it never changes when I change the drive mode in pikvm.
   
   

2. The flash drive mode does not work at all with the two ISO images I tested. CD-ROM works with both images although the 4GB ISO won't show up (as expected) but at least Windows is detecting that something was "inserted" into the virtual drive and pops up an explorer window. I've tried swapping around the images and disk modes but flash doesn't work in any combination. I can see that something with the appropriate size was mounted but the filesystem is always RAW.
   

[2020-08-15 17:15:05 kvmd.service] --- kvmd.plugins.msd.otg.helpers INFO --- Unlocking the drive ...
[2020-08-15 17:15:05 kvmd.service] --- kvmd.plugins.msd.otg.helpers INFO --- Executing helper ['/usr/bin/sudo', '--non-interactive', '/usr/bin/kvmd-helper-otgmsd-unlock', 'unlock'] ...
[2020-08-15 17:15:05 kvmd.service] --- kvmd : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/kvmd-helper-otgmsd-unlock unlock
[2020-08-15 17:15:05 kvmd.service] --- pam_unix(sudo:session): session opened for user root by (uid=0)
[2020-08-15 17:15:05 kvmd.service] --- pam_unix(sudo:session): session closed for user root
[2020-08-15 17:15:05 kvmd.service] --- kvmd.plugins.msd.otg.helpers INFO --- Console: Sending SIGUSR1 to MSD 'file-storage' kernel thread with pid=396 ...
[2020-08-15 17:15:05 kvmd.service] --- aiohttp.access INFO --- [admin (token) / 100.126.161.74] 'POST /msd/disconnect HTTP/1.0' => 200; size=193 --- referer='https://xxx.xxx.xxx.xxx/kvm/'; user_agent='Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36'
[2020-08-15 17:15:05 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: ================================================================================
[2020-08-15 17:15:05 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- ERROR [1518.288 stream] -- Can't open device: No such file or directory
[2020-08-15 17:15:05 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- INFO [1518.288 stream] -- Sleeping 1 seconds before new stream init ...
[2020-08-15 17:15:06 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: ================================================================================
[2020-08-15 17:15:06 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- ERROR [1519.288 stream] -- Can't open device: No such file or directory
[2020-08-15 17:15:06 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- INFO [1519.288 stream] -- Sleeping 1 seconds before new stream init ...
[2020-08-15 17:15:07 kvmd.service] --- aiohttp.access INFO --- [admin (token) / 100.126.161.74] 'POST /msd/set_params?image=AcronisBootablePEMedia_Win.iso HTTP/1.0' => 200; size=193 --- referer='https://xxx.xxx.xxx.xxx/kvm/'; user_agent='Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36'
[2020-08-15 17:15:07 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: ================================================================================
[2020-08-15 17:15:07 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- ERROR [1520.288 stream] -- Can't open device: No such file or directory
[2020-08-15 17:15:07 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- INFO [1520.288 stream] -- Sleeping 1 seconds before new stream init ...
[2020-08-15 17:15:08 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: ================================================================================
[2020-08-15 17:15:08 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- ERROR [1521.289 stream] -- Can't open device: No such file or directory
[2020-08-15 17:15:08 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- INFO [1521.289 stream] -- Sleeping 1 seconds before new stream init ...
[2020-08-15 17:15:09 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: ================================================================================
[2020-08-15 17:15:09 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- ERROR [1522.289 stream] -- Can't open device: No such file or directory
[2020-08-15 17:15:09 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- INFO [1522.289 stream] -- Sleeping 1 seconds before new stream init ...
[2020-08-15 17:15:10 kvmd.service] --- kvmd.plugins.msd.otg.helpers INFO --- Unlocking the drive ...
[2020-08-15 17:15:10 kvmd.service] --- kvmd.plugins.msd.otg.helpers INFO --- Executing helper ['/usr/bin/sudo', '--non-interactive', '/usr/bin/kvmd-helper-otgmsd-unlock', 'unlock'] ...
[2020-08-15 17:15:10 kvmd.service] --- kvmd : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/kvmd-helper-otgmsd-unlock unlock
[2020-08-15 17:15:10 kvmd.service] --- pam_unix(sudo:session): session opened for user root by (uid=0)
[2020-08-15 17:15:10 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: ================================================================================
[2020-08-15 17:15:10 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- ERROR [1523.289 stream] -- Can't open device: No such file or directory
[2020-08-15 17:15:10 kvmd.service] --- kvmd.apps.kvmd.streamer INFO --- Console: -- INFO [1523.289 stream] -- Sleeping 1 seconds before new stream init ...
[2020-08-15 17:15:10 kvmd.service] --- pam_unix(sudo:session): session closed for user root
[2020-08-15 17:15:10 kvmd.service] --- kvmd.plugins.msd.otg.helpers INFO --- Console: Sending SIGUSR1 to MSD 'file-storage' kernel thread with pid=396 ...
[2020-08-15 17:15:10 kvmd.service] --- aiohttp.access INFO --- [admin (token) / 100.126.161.74] 'POST /msd/connect HTTP/1.0' => 200; size=193 --- referer='https://xxx.xxx.xxx.xxx/kvm/'; user_agent='Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36'

My PC is running Windows 8.1 and I'm using a RPi 4 2GB with the official pikvm image. USB connection is made through a USB2 splitter cable.
Edit: Doesn't work either with USB-C.

KVMD: 1.88
Streamer: 1.21 (ustreamer)
HAS_PDEATHSIG: Yes
WITH_GPIO: Yes
WITH_OMX: Yes
WITH_PTHREAD_NP: Yes
WITH_SETPROCTITLE: Yes
Linux kernel:
Machine: armv7l
Release: 5.4.51-2-ARCH
Version: #1 SMP PREEMPT Sat Aug 8 23:15:21 UTC 2020

Edit 2:
Images tested:

• Windows 10 1909
• Acronis WinPE
• Ubuntu 18.04
• archlinux-2020.08.01-x86_64.iso
• Clonezilla Live 2.6.5

Hello

I am s till in the process of getting this to work on my ZeroW's and Pi 3 as that is what the Fmstrat/diy-ipmi used when I first set up the system. I wanted to switch to this to see if there is a way that we could open this up to manage multiple hosts at a time from a RPi4 or if it would be better to manage this on a Per Host Basis with 3 seperate ZeroW's?

Hello,

I've made the following PCB in EASYeda and order a few of the boards from JLCPCB. I am also waiting on the MOSFETS. Once those arrive I'll be able to confirm the linked PCB is a valid design. If you notice anything that should be changes please feel free to let me know.

https://easyeda.com/mark.gilbert/zerow-kvm-v1

My wireless network ESSID is "GET OFF MY LAN". When configuring Arch Linux wireless using wifi-menu in rw mode, it creates an interface that netctl can enable; when escaped by systemd-escape the output, and device-specific unit file, appears as

wlan0\x2dGET\x20OFF\x20MY\x20LAN

During the build process ("Building OS"), make os calls docker build with the WIFI_ESSID='GET \ resulting in

/bin/sh: 12: Syntax error: Unterminated quoted string

Looks like BUILD_OPTS of ~/os/.pi-builder/Makefile (line 35) may be splitting based on the IFS, ignoring the quotes around the variable name. Unfortunately, and admittedly, it's been a while since I've coded a Makefile, for now I've created an alternate ESSID without special characters or spaces and was able to complete the build successfully.

While uploading a new image the mass storage dropdown menu disappears after selecting the .iso file from the computer with a double click. It would be great if either the upload would start immediately after selecting the image or if the dropdown would stay open to click "Start". It does stay open if the file is selected in the explorer window and confirmed with "Open".
Same goes for "Disconnect drive". Users might want to swap to a different image but the dropdown menu disappears as soon as you click on "Disconnect drive" and you'll have to reopen it again.

Hello!

A little discovery shows it is possible to create FPGA based capture hardware device using simple fpga boards and VGA output.

If you google you will find a lot of FPGA VGA examples and ready verilog scripts to create simple output -> VGA, but simple rework of code can create perfect and super cheap FPGA capturing device using standard VGA output.

How do you like this idea?

When I looked at the hdmi to csi adapter on alibaba, I noticed they suggested a new version https://www.aliexpress.com/item/4000152180240.html which has two sizes of ffc connector. If/when you know how it works, you might want to add info comparing them. In the photos of the new version, it appears that the smaller connector is rotated 180 degrees from its silkscreen and the solder pads which should hold it down, which is concerning...

You made it onto hackaday and from there into my news feed. That's some crazy soldering you've managed!

Hi!

There is a bug/glitch with ASUS bios when using the TC358743 chip (I'm using the Lusya bridge). My guess is because the "low" resolution (720p).

Is there any way to force the hdmi stream at 1080p at lower framerates?

Thanks!

I use a RPi 4B. When I try to reduce the stream quality, it doesn't work. From dmesg:

[  178.270874] 1f40: 00000000 00088cb8 eff550f4 c021a420 00000000 c1400000 c1404fb0 c1404ff8
[  178.288902] 1f60: c14d9580 c126ce48 30c5387d 00000000 c1500e10 c1401f90 c0209268 c020926c
[  178.306991] 1f80: 60070013 ffffffff
[  178.320471] [<c0201a78>] (__irq_svc) from [<c020926c>] (arch_cpu_idle+0x38/0x3c)
[  178.337882] [<c020926c>] (arch_cpu_idle) from [<c025ef38>] (do_idle+0xc4/0x148)
[  178.355092] [<c025ef38>] (do_idle) from [<c025f2a8>] (cpu_startup_entry+0x18/0x20)
[  178.372530] [<c025f2a8>] (cpu_startup_entry) from [<c1200f90>] (start_kernel+0x500/0x540)
[  178.480634] i2c-bcm2835 fe205000.i2c: i2c transfer timed out
[  178.495735] tc358743 10-000f: i2c_wr: writing register 0x500 from 0xf failed
[  179.520647] i2c-bcm2835 fe205000.i2c: i2c transfer timed out
[  179.535793] tc358743 10-000f: i2c_wr: writing register 0x500 from 0xf failed
[  180.560663] i2c-bcm2835 fe205000.i2c: i2c transfer timed out
[  180.575765] tc358743 10-000f: i2c_wr: writing register 0x500 from 0xf failed
[  181.600674] i2c-bcm2835 fe205000.i2c: i2c transfer timed out
[  181.615807] tc358743 10-000f: i2c_wr: writing register 0x500 from 0xf failed
[  181.633387] tc358743 10-000f: i2c_rd: reading register 0x14 from 0xf failed

Btw, I have a B101 Revision 4. I think that the RPi or the B101 could have a problem. What do you think?

Originally posted by @stsirakidis in #16 (comment)

Hi There,

I can successfully log into pikvm and stream video using the B101 HDMI->CSI adapter on a pi4 when USB-C powered but when I try the same setup (same SD card, B101, input host etc) but with the pi4 powered using a PoE Hat rather than USB-C power, it appears pikvm cannot find the B101 when booting (even though the B101 green power light is enabled indicating the B101 is being powered)...

I've attached the dmesg boot output from when (A) pi4 powered by USB-C and (b) pi4 powered by PoE Hat.

When the pi4 boots with USB-C power, I get the following type of messages in dmesg:

[    9.190789] tc358743 0-000f: tc358743 found @ 0x1e (bcm2835 I2C adapter)

When the pi4 boots with PoE Hat power, I get the following type of messages in dmesg:

[     10.002996] tc358743 0-000f: i2c_rd: reading register 0x0 from 0xf   failed
[     10.010416] tc358743 0-000f: not a TC358743 on address 0x1e

Thanks for taking the time to take a look!
A-dmesg-pi4-with-USBC-power.txt
B-dmesg-pi4-with-PoE-power.txt

I'm using a Raspberry Pi 4 with the USB HDMI dongle, my video is coming out quite blurry - is there any diagnostic work I can do to check this or scope out what exactly is causing it?

Example:

Potential security breach. See /configs/kvmd/htpasswd

raspberrypi/linux#3647

Hello,

Is there any instructions how to connect B101 to RPI 4? Will it work with the cable supplied with B101?

By the way, following the build instructions on Ubuntu, I received the following message:
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock:

Since I'm not familiar with docker, it took me a while to find the solution:
sudo chmod 666 /var/run/docker.sock
I think this info could be helpful to other people.

Regards,
Slava

Hi, the optocoupler I bought isn't working for some reason, so I'm using this relay instead.

The problem I have, is that the logic needs to be inverted for this relay to work, otherwise it will initialized with the "on" state and the PC won't be able to start. Inverting the logic at the relay as "normally open" will work only if the rpi is on.

For the moment I am manually editing the set_output and write methods on
/usr/lib/python3.8/site-packages/kvmd/gpio.py for this to work.

We could use an ENV variable, like GPIO_INVERT_WRITE and GPIO_INVERT_READ.

Hello,

Not meaning to nitpick, but it wasn't clear at first that the Mosfets are required for the v2 models due to the way the Readme was structured.

You have the Mosfets listed under v0 only:

HID Subsystem (only for v0)

4x MOSFET relay OMRON G3VM-61A1

For a permanent installation the available options are already great (Power switch, Reset, HDD Led, Power LED) but is IMHO missing one crucial part. The internal PC speaker output for BIOS POST diagnostics. It would be a great addition to the already available information and control options in pikvm.
I'm seeing two options here:

1. Capture the audio and redirect it to the web interface
2. Decode the signal and display the beeps as some kind of morse code history in the web interface

I did some research and the PC speaker (piezo) seems to be controlled via voltage. (Wikipedia)[https://en.wikipedia.org/wiki/PC_speaker#Pulse-width_modulation]
In theory it should be possible to detect those voltages and the length. I've ordered a MCP3008-I/P and give it a shot once it arrives.

In the Documentation you state that S-Video capture only works for the v2 Platforms.

I would however like to use a Pi Zero W, with a USB Video Capture UTV 007. Can you clarify why it isn't possible to use these on the V2 Platform devices?

I'm looking for documentation, or even just the source code, for the API for pikvm. I looked through this repo, the website, and subreddit and I couldn't find anything.

If documentation doesn't exist I'm absolutely willing to help with that too..

Translating the web interface would make it more accessible for a broader audience.

From what I've understood you're using pug formerly Jade to generate the web interface. Javascript isn't exactly my forte but I found some information:

• pugjs/pug#2922
• https://i18next.github.io/i18next/node/pages/doc_express.html

Not sure if this is in scope but it would be awesome to have a mouse jiggle (or similar feature) to prevent a client computer from going to sleep/locking.

Hi, I have problems running make os.

$ make os
[ ... ] 
Step 14/77 : RUN rm -f /etc/localtime 	&& ln -s "/usr/share/zoneinfo/$TIMEZONE" /etc/localtime
 ---> Using cache
 ---> 64e3d0ac22f9
Step 15/77 : RUN echo "HOOKS=(base udev block filesystems)" >> /etc/mkinitcpio.conf
 ---> Using cache
 ---> a9f9c08e6fdd
Step 16/77 : RUN echo "Server = $REPO_URL/\$arch/\$repo" > /etc/pacman.d/mirrorlist 	&& pacman-key --init 	&& pacman-key --populate archlinuxarm
 ---> Running in f2eafdce47d2
gpg: /etc/pacman.d/gnupg/trustdb.gpg: trustdb created
gpg: no ultimately trusted keys found
gpg: starting migration from earlier GnuPG versions
gpg: porting secret keys from '/etc/pacman.d/gnupg/secring.gpg' to gpg-agent
gpg: migration succeeded
gpg: Generating pacman keyring master key...
gpg: agent_genkey failed: End of file
gpg: key generation failed: End of file
gpg: Done
==> Updating trust database...
gpg: no need for a trustdb check
==> Appending keys from archlinuxarm.gpg...
gpg: key B55C5315DCD9EE1A was created 16088 days in the future (time warp or clock problem)
gpg: key B55C5315DCD9EE1A was created 16048 days in the future (time warp or clock problem)
gpg: key B55C5315DCD9EE1A was created 16048 days in the future (time warp or clock problem)
gpg: key B55C5315DCD9EE1A was created 16048 days in the future (time warp or clock problem)
gpg: key B55C5315DCD9EE1A: no valid user IDs
gpg: key BC704E86B823CD25 was created 16088 days in the future (time warp or clock problem)
gpg: key BC704E86B823CD25 was created 16048 days in the future (time warp or clock problem)
gpg: key BC704E86B823CD25 was created 16048 days in the future (time warp or clock problem)
gpg: key BC704E86B823CD25 was created 16048 days in the future (time warp or clock problem)
gpg: key BC704E86B823CD25: no valid user IDs
gpg: key BF7EEF7A9C6B5765 was created 16088 days in the future (time warp or clock problem)
gpg: key BF7EEF7A9C6B5765 was created 16048 days in the future (time warp or clock problem)
gpg: key BF7EEF7A9C6B5765 was created 16048 days in the future (time warp or clock problem)
gpg: key BF7EEF7A9C6B5765 was created 16048 days in the future (time warp or clock problem)
gpg: key BF7EEF7A9C6B5765: no valid user IDs
gpg: key 77193F152BDBE6A6 was created 16088 days in the future (time warp or clock problem)
gpg: key 77193F152BDBE6A6 was created 16048 days in the future (time warp or clock problem)
gpg: key 77193F152BDBE6A6 was created 16048 days in the future (time warp or clock problem)
gpg: key 77193F152BDBE6A6 was created 16048 days in the future (time warp or clock problem)
gpg: key 77193F152BDBE6A6: no valid user IDs
==> Locally signing trusted keys in keyring...
  -> Locally signing key 69DD6C8FD314223E14362848BF7EEF7A9C6B5765...
==> ERROR: 69DD6C8FD314223E14362848BF7EEF7A9C6B5765 could not be locally signed.
  -> Locally signing key 02922214DE8981D14DC2ACABBC704E86B823CD25...
==> ERROR: 02922214DE8981D14DC2ACABBC704E86B823CD25 could not be locally signed.
  -> Locally signing key 9D22B7BB678DC056B1F7723CB55C5315DCD9EE1A...
==> ERROR: 9D22B7BB678DC056B1F7723CB55C5315DCD9EE1A could not be locally signed.
The command '/bin/sh -c echo "Server = $REPO_URL/\$arch/\$repo" > /etc/pacman.d/mirrorlist 	&& pacman-key --init 	&& pacman-key --populate archlinuxarm' returned a non-zero code: 1
Makefile:207: [makefile error ...]

When I add RUN date in the .pi-builder/stages/os/Dockerfile.part and run it again, it shows that date is set to 1970.
It worked once in my previous environment, now I'm running it it in qemu vm with debian buster and can't figure out whats wrong.
Why docker have such problems with setting date?

As discussed with @mdevaev:

The keypad is not working at the moment, tested with a german keyboard layout.

Hello mdevaev,
I would like to build the v2 version of your project for my server. But I can't get 390 Ohm resistors in Switzerland.

I have already ordered: 10 Ohm, 100 Ohm, 220 Ohm, 330 Ohm, and 470 Ohm.

Can I use one or more of these instead of the 390 Ohm?

Friendly greetings
Michael Reber

FIrst I want to thank you for your great project. You provide exactly the thing I was looking for. Thank you very much for all your effort you put into this project.

Powering Off HDMI saves 25 mA on the PI Zero W. Because powersupplies don't have 100 % efficiency you save 0.15-0.2 Watt. https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-conserve-energy It sounds not a lot, but in sum it is a lot. This amount also applies to the RPI4.
99 % of users won't need the HDMI output of the KVM Raspberry PI.
So we could savely turn off HDMI via /opt/vc/bin/tvservice -o
On Raspian I do this with a crontab "@reboot" line, however I'm not firm with ArchLinux. So it would be great if you add an option to disable HDMI.

RaspberryPi with hat is very big and difficult to cool, so, why don't you think about making board for RPi ComputeModule, or JetsonNano CM with some cooling solutions - it will be very handful. It could be in form of PCI card - physically only, not using PCI-connector - to get power inside pc and connect RJ-45 from back of case.

For those random folks who come across this from Reddit, Google, etc, you should have a section telling folks on how to connect things up to the computer/server they are looking to remotely manage. Would be helpful.

Also a section with commentary about options for older systems that have, say, VGA or DVI output on the motherboard, but no HDMI, etc.

Little touches to the documentation :)

Nice work!

Hello there,

I will plan to buy a Rpi4 + HDMI to CSI board.

I only want to see the remote screen and control mouse+keyboard. It enough this and not need to do the other connections?

It would be really nice if we could mount read/write images to use them as virtual hdds or usb drives.

e.g: could be "writable" or "read-only"