On 1/18/22 5:40 PM, Sam Varshavchik wrote:
Rogan Dawes writes:
have to reboot to allow the laptop to detect the screen again. Xrandr
does not detect the display if run manually, and the Settings app
Displays page also doesn't show the TV.
This is a rather difficult thing to google, I have had zero results
in my searching.
This seems to be a long running issue with various Nvidia cards, in my
experience. If a monitor is present and powered on at boot time
everything is fine. If the monitor gets powered off or disconnected it
won't ever come alive again, until the next reboot. This is not
limited just to nvidia's drivers. In all other respects my old geforce
gtx 285 works just fine with nouveau; this is the only defect.
Several months ago I started to experience a similar issue: screen going
off while PC is sleeping then never coming back on until reboot.
When a sleep event occurred, syslog showed a failed attempt to suspend
the NVIDIA device. This led me to do a Google search that led me to a
new RPM:
xorg-x11-drv-nvidia-power
It installed several service unit files:
/usr/lib/systemd/system/nvidia-fallback.service
/usr/lib/systemd/system/nvidia-hibernate.service
/usr/lib/systemd/system/nvidia-resume.service
/usr/lib/systemd/system/nvidia-suspend.service
I don't recall whether I had to manually enable any of these services,
but I eventually managed to restore proper NVIDIA behavior for power events.
Dave
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