The screen will display for a minute or two before the display will stop and the screen is blank. After 4 minutes the display is back ON.

 

Armbian_21.02.3_Odroidc4_focal_current_5.10.21_xfce_desktop

 

Last errors reported;

 

Mar 11 20:00:00 odroidc4 systemd-udevd[1507]: card1: Worker [1535] failed
Mar 11 20:00:00 odroidc4 systemd-udevd[1507]: Worker [1535] terminated by signal 9 (KILL)
Mar 11 20:00:00 odroidc4 systemd-udevd[1507]: card1: Worker [1535] processing SEQNUM=2984 killed
Mar 11 20:00:00 odroidc4 systemd-udevd[1535]: card1: Spawned process '/usr/local/bin/hdmi-hotplug' [4565] timed out after 2min 59s, killing
Mar 11 19:59:14 odroidc4 systemd[1]: armbian-disable-autologin.service: Succeeded.
Mar 11 19:59:13 odroidc4 systemd[1]: /lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating /var/run/dbus/system_bus_socket → /run/dbu>
Mar 11 19:59:13 odroidc4 systemd[1]: Reloading.
Mar 11 19:59:13 odroidc4 systemctl[5584]: Removed /etc/systemd/system/timers.target.wants/armbian-disable-autologin.timer.
Mar 11 19:59:13 odroidc4 systemd[1]: Started Disable automated desktop login.
Mar 11 19:58:04 odroidc4 systemd[4695]: tracker-store.service: Succeeded.
Mar 11 19:58:04 odroidc4 tracker-store[4871]: OK
Mar 11 19:58:00 odroidc4 systemd-udevd[1507]: card1: Worker [1535] processing SEQNUM=2984 is taking a long time
Mar 11 19:58:00 odroidc4 systemd-udevd[1535]: card1: Spawned process '/usr/local/bin/hdmi-hotplug' [4565] is taking longer than 59s to complete

 

+1 same problem here

Your issue report is invalid for one or multiple reasons (non-exhaustive enumeration):

 

• it has been stated at the wrong place
• it lacks fundamental requested data
• it could have been easily solved by a quick search and/or reading documentation
• unsupported userspace/image/SBC

 

Since you refused to use the bug reporting form carefully and follow the information there as you have been asked for we have no intention to further investigate.

Please add missing information if applicable.

 

https://www.armbian.com/bugs

Here is the link for armbianmonitor: http://ix.io/2SFW

Is this happening only on Ubuntu variant?

Yes, I tested with buster and it works ... same kernel!

I suspect the problem is related the hdmi-hotplug script.

 

After some testing, I found out the /usr/local/bin/hdmi-hotplug in my C4 is targeted to card0, but in my case sometimes it is card1 or card0.

This is probably caused by using the same monitor for the C4 and my home computer.

 

Events from udev with the current Armbian 21.02.3 Focal with Linux 5.10.21-meson64

 

odroidc4:~:% cat /sys/class/drm/card1-HDMI-A-1/status
connected

odroidc4:~:% cat /sys/class/drm/card0-HDMI-A-1/status
cat: /sys/class/drm/card0-HDMI-A-1/status: No such file or directory

odroidc4:~:% udevadm monitor                         
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[131.401448] remove   /devices/virtual/bdi/0:54 (bdi)
UDEV  [131.403431] remove   /devices/virtual/bdi/0:54 (bdi)
UDEV  [186.367158] change   /devices/platform/soc/ff900000.vpu/drm/card1 (drm)
UDEV  [186.602533] change   /devices/platform/soc/ff900000.vpu/drm/card1 (drm)

 

Events from udev, I deleted hdmi-hotplug ... it works!

 

odroidc4:~:% udevadm monitor                         
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[56.405274] remove   /devices/virtual/bdi/0:54 (bdi)
UDEV  [56.409049] remove   /devices/virtual/bdi/0:54 (bdi)
KERNEL[134.277835] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
UDEV  [134.287043] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
KERNEL[134.580938] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
UDEV  [134.584109] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
KERNEL[135.250948] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
UDEV  [135.253994] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
KERNEL[135.553941] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)
UDEV  [135.556854] change   /devices/platform/soc/ff900000.vpu/drm/card0 (drm)