Strange problem with Ubuntu 18.04.3 LTS (with Linuxium's patched 5.3 kernel) -- I have all known "sleep" options turned off in Ubuntu for my NEO Z83-4U, but one monitor still goes blank after about 24 hours of running.
Privacy -> Screen Lock = Off
Power -> Blank screen = Never
Power -> Automatic suspend = Off
Devices -> Displays -> Mirror selected
Devices -> Displays -> Night Light = Off
The 2 monitors are the exact same model (ViewSonic VX2770SMH-LED). One monitor is being driven by a normal HDMI to HDMI cable, and the other is being driven by an active mini DisplayPort to HDMI cable. The DisplayPort monitor remained on for over 72 hours, but the HDMI monitor appears to go blank during that time.
I have multiple inputs to the HDMI monitor, and I can switch between a working Windows 10 source and the Ubuntu 18 source. But, the Ubuntu source is blank. It's almost like the monitor has gone to sleep, but it's not asleep or in power-save mode; I also do not get a "loss of signal" error message from the monitor (so it appears synced...). Lastly, I cannot get the monitor to become active again until I reboot Ubuntu. Changing the arrangement (joined versus mirrored) in Ubuntu does not bring the monitor back from being blank.
I see some dmesg logs that might be related:
[drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A (start=14883587, end=14883588) time 528 us, min 1073, max 1079, scanline start 1052, end 1053
There are quite a few of these errors, but they vary in timing (as far as when they occur) and the "time" value in the log. The first occurrence of the log in dmesg is at almost 24 hours (85700.676386 seconds since boot).
Any ideas how to debug this issue? Is it a driver bug? I have plans to use the NEO Z83-4U as a digital signage device, but if I can't keep one of the monitors on at all times, that kind of defeats the purpose.
Thanks for any help,
Neil
Privacy -> Screen Lock = Off
Power -> Blank screen = Never
Power -> Automatic suspend = Off
Devices -> Displays -> Mirror selected
Devices -> Displays -> Night Light = Off
The 2 monitors are the exact same model (ViewSonic VX2770SMH-LED). One monitor is being driven by a normal HDMI to HDMI cable, and the other is being driven by an active mini DisplayPort to HDMI cable. The DisplayPort monitor remained on for over 72 hours, but the HDMI monitor appears to go blank during that time.
I have multiple inputs to the HDMI monitor, and I can switch between a working Windows 10 source and the Ubuntu 18 source. But, the Ubuntu source is blank. It's almost like the monitor has gone to sleep, but it's not asleep or in power-save mode; I also do not get a "loss of signal" error message from the monitor (so it appears synced...). Lastly, I cannot get the monitor to become active again until I reboot Ubuntu. Changing the arrangement (joined versus mirrored) in Ubuntu does not bring the monitor back from being blank.
I see some dmesg logs that might be related:
[drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A (start=14883587, end=14883588) time 528 us, min 1073, max 1079, scanline start 1052, end 1053
There are quite a few of these errors, but they vary in timing (as far as when they occur) and the "time" value in the log. The first occurrence of the log in dmesg is at almost 24 hours (85700.676386 seconds since boot).
Any ideas how to debug this issue? Is it a driver bug? I have plans to use the NEO Z83-4U as a digital signage device, but if I can't keep one of the monitors on at all times, that kind of defeats the purpose.
Thanks for any help,
Neil