Shortly after upgrading to NVIDIA driver 460.56 on my Ubuntu 18.04 install with 2 monitors, when I lock my computer and the displays turn off, if my 2 displays are off long enough, the primary display becomes unresponsive and I have to physically unplug the monitor and then plug it back in - but then of course, I have to re-arrange my desktop icons which is quite annoying. This did not happen before NVIDIA driver 460.56, I’ve had the same Linux kernel since January or February, and I don’t believe any other software has changed either. I see that 460.56 came out 2021/2/25 which is around when I started having these issues. This issue has become rather bothersome, and I’ve been running Ubuntu 18.04 since 2019 without any issues, Ubuntu 16.04 since 2017 without any issues, and the same GTX 1070 this whole time without any issues until just now. After the computer is locked each night and the displays are turned “off”, the VG248QE monitor in question has an orange LED indicating that the monitor is actually “on”, and you should be able to turn it off (resulting in no LED) or provide a signal to it (resulting in blue LED) or go through the monitor menu, switch sources, etc but the monitor has an orange LED and is completely unresponsive instead - it cannot even be turned off, it requires re-plugging the power cable of the monitor to even do anything. My second monitor, my PA248Q monitor, does not exhibit any of these symptoms and behaves normally all the time. In February and an entire 3 years prior, I did not have this problem and both monitors functioned completely normally.
This could be related to /t/460-56-no-desktop-on-resume-from-suspend-to-ram/170275, I think there was a regression in the 460.56 since I’m not the only one having issues with resuming from suspend/sleep and/or locking, and this was working fine for me before.
Here are my computer specs:
OS: Ubuntu 18.04.5 LTS x86_64
Uptime: 1 day, 19 hours, 41 mins
Shell: zsh 5.4.2
Resolution: 1920x1200, 1920x1080
WM Theme: Default
Theme: Xfce-dusk [GTK2], Greybird [GTK3]
Icons: Elementary-xfce-darker [GTK2/3]
Terminal Font: Hack 12
CPU: Intel i7-5960X (16) @ 4.300GHz
GPU: NVIDIA GeForce GTX 1070
Memory: 14513MiB / 32081MiB
If anyone has any advice or things I could look into, or if this bug doesn’t seem to be related with NVIDIA but rather with Xfce or something else, please let me know.