r82xx_write: i2c wr failed=-9 reg=1a len=1 about satdump HOT 6 OPEN

If the server is running on a Raspberry Pi this is likely a classic case of an inadequate power supply.

from satdump.

Same effect just clicking to activate AGC

Disabled direct sampling mode
[13:20:49 - 21/03/2024] (D) Set RTL-SDR frequency to 1544000000
[13:20:49 - 21/03/2024] (D) Set RTL-SDR Bias to 1
[13:20:49 - 21/03/2024] (D) Set RTL-SDR AGC to 0
[13:20:49 - 21/03/2024] (D) Set RTL-SDR Gain to 0
[13:20:49 - 21/03/2024] (D) Set RTL-SDR PPM Correction to 0
[13:20:49 - 21/03/2024] (I) Source started!
[13:20:49 - 21/03/2024] (T) RTL-SDR Buffer size 32256
r82xx_write: i2c wr failed=-9 reg=05 len=1
r82xx_read: i2c wr failed=-9 reg=00 len=1
r82xx_read: i2c wr failed=-9 reg=00 len=1
r82xx_write: i2c wr failed=-9 reg=07 len=1
r82xx_write: i2c wr failed=-9 reg=05 len=1
r82xx_write: i2c wr failed=-9 reg=07 len=1
r82xx_write: i2c wr failed=-9 reg=07 len=1
r82xx_write: i2c wr failed=-9 reg=0c len=1
[13:21:33 - 21/03/2024] (D) Set RTL-SDR AGC to 1
[13:21:33 - 21/03/2024] (D) Set RTL-SDR Gain to 0
[13:21:34 - 21/03/2024] (I) Waiting for the thread...
[13:21:34 - 21/03/2024] (I) Thread stopped
Reattached kernel driver
[13:21:34 - 21/03/2024] (I) Source stopped!
[13:21:34 - 21/03/2024] (D) Sending source settings

from satdump.

For info :
Streaming displays is aroud 1.2 MB/s for a Samplefrate of 650 ksps on average.

from satdump.

Hello! It sounds like the underlying kernel driver is not detaching properly. Try blacklisting the kernel modules by adding the following lines to /etc/modprobe.d/blacklist.conf, then reboot the system running SDR Server and try again:

blacklist dvb_usb_rtl28xxu
blacklist rtl2832
blacklist rtl2830

If this does not work, can you try another program on the same machine to see if the dongle works in that program?

from satdump.