= Ubuntu 21.10 does not wake up from suspend
{title2=`nv_set_system_power_state`}
Please refer to <video Linus Torvalds saying "Nvidia Fuck You" (2012)>.
https://askubuntu.com/questions/1032633/18-04-screen-remains-blank-after-wake-up-from-suspend/1391917#1391917
Reported at: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-470/+bug/1953674
On <ciro santilli s hardware/Lenovo ThinkPad P51 (2017)>.
Does not happen every time, only some times. Can't figure out why. Usually happens when has suspended for a longer time.
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-470/+bug/1946303 sounds like a likely report, <Nvidia> driver version 470, but can't find those error messages anywhere. The last line of:
``
journalctl -o short-precise -k -b -1
``
once was:
``
PM: suspend entry (deep)
``
which is when sleep starts.
This suggests that it is not a video bug then, seems that it is not waking up at all? Gotta try to SSH into it. OK. I did SSH into it, and that was fine, so it is just the video that won't start.
``
PM: suspend exit
``
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1949977 is another possible bug, based on kernel version. I'm running 5.13, which is one of the failing versions on the report. Can't find any interesting dmesg though.
In another crash:
``
journalctl -o short-precise -k -b -1
``
had the following interesting lines:
``
nvidia-modeset: WARNING: GPU:0: Lost display notification (0:0x00000000); continuing.
[24307.640014] NVRM: GPU at PCI:0000:01:00: GPU-18af74bb-7c72-ff70-e447-87d48378ea20
[24307.640018] NVRM: Xid (PCI:0000:01:00): 79, pid=8828, GPU has fallen off the bus.
[24307.640021] NVRM: GPU 0000:01:00.0: GPU has fallen off the bus.
[24328.054022] nvidia-modeset: ERROR: GPU:0: The requested configuration of display devices (LGD (DP-4)) is not supported on this GPU.
[repeats several more times]
[24328.056767] nvidia-modeset: ERROR: GPU:0: The requested configuration of display devices (LGD (DP-4)) is not supported on this GPU.
[24328.056951] nvidia-modeset: ERROR: GPU:0: Failed to query display engine channel state: 0x0000927c:0:0:0x0000000f
[24328.056955] nvidia-modeset: ERROR: GPU:0: Failed to query display engine channel state: 0x0000927c:1:0:0x0000000f
[24328.056959] nvidia-modeset: ERROR: GPU:0: Failed to query display engine channel state: 0x0000927c:2:0:0x0000000f
[24328.056962] nvidia-modeset: ERROR: GPU:0: Failed to query display engine channel state: 0x0000927c:3:0:0x0000000f
[24328.056983] nvidia-modeset: ERROR: GPU:0: DP-4: Failed to disable DisplayPort audio stream-0
[24328.056992] nvidia-modeset: ERROR: GPU:0: Failed to query display engine channel state: 0x0000947d:0:0:0x0000000f
``
and there was a corresponding `/var/crash/_usr_sbin_gdm3.0.crash`.
Related "GPU has fallen off the bus": https://askubuntu.com/questions/868321/gpu-has-fallen-off-the-bus-nvidia
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