meson-drm d0100000.vpu: [drm:drm_fbdev_client_hotplug] *ERROR* fbdev: Failed to setup generic emulation (ret=-22) about jetson-nano HOT 10 CLOSED

I don't understand your question. Write in detail what you are doing and what the problem is.

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I don't understand your question. Write in detail what you are doing and what the problem is.

1. HDMI has no show, SSH login is normal;
   The equipment used is Phicomm N1

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check your DTS settings.

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The DTS is consistent with the normal display DTS file, and whether the DTS problem can be excluded.

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The version of the image ?

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Problem version:
20190712 5.2.0 -> 7f258e5
20181018 4.19.0-rc7 -> 5e7b968

Tested normal version:
20190316 5.0.0 -> 542320b
20181012 4.18.7 -> ce98737

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Version image Armbian

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Debian 9

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I ask the version of the image Armbian which does not work HDMI.

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I don't quite understand what you mean

Kernel ：7f258e5d352505dcb38ce871eff0d72e1ef94206 (Compiled kernel HDMI does not display)
rootfs ：2018-10-18-debian-arm64-n1-stretch.zip

Hardware：（Phicomm N1）
CPU: Amlogic S905D
RAM: 2G DDR3
64G eMMC
Ethernet: RTL8211F Gigabit Ethernet
WIFI/Bluetooth: ? CYW43455 ( same as Raspberry Pi 3B+ ) 5G WiFi IEEE 802.11n/ac with

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