Comment 2 for bug 2025124

The issue persists also with the 5.8 and 5.15 kernels that are installable on Focal.

It actually looks like the machine wakes up, but Xorg does not. I was able to shut down the machine gracefully by pressing the power button.

Looking at the log files after rebooting, it looks like there is a problem with nouveau:

Jul 04 08:08:50 christian-homeoffice kernel: pci_bus 0000:05: Allocating resources
Jul 04 08:08:50 christian-homeoffice kernel: pci 0000:04:00.0: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 05] add_size 200000 add_align 100000
Jul 04 08:08:50 christian-homeoffice kernel: pci 0000:04:00.0: BAR 15: no space for [mem size 0x00200000 64bit pref]
Jul 04 08:08:50 christian-homeoffice kernel: pci 0000:04:00.0: BAR 15: failed to assign [mem size 0x00200000 64bit pref]
Jul 04 08:08:50 christian-homeoffice kernel: pci 0000:04:00.0: BAR 15: no space for [mem size 0x00200000 64bit pref]
Jul 04 08:08:50 christian-homeoffice kernel: pci 0000:04:00.0: BAR 15: failed to assign [mem size 0x00200000 64bit pref]
Jul 04 08:08:50 christian-homeoffice kernel: done.
Jul 04 08:08:50 christian-homeoffice kernel: PM: suspend exit
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: gr: TRAP ch 3 [003fbc6000 Xorg[1162]]
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: gr: UNK6 80000001 [TEMP_TOO_SMALL]
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: gr: TRAP UNHANDLED 00000020
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: fifo: read fault at bad0ac1000 engine 00 [PGRAPH] client 05 [CTXCTL] reason 00 [PT_NOT_PRESENT] on channel 3 [003fbc6000 Xorg[1162]]
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: fifo: gr engine fault on channel 3, recovering...
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:46 christian-homeoffice systemd-sleep[150344]: System resumed.
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:50 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:51 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:51 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:51 christian-homeoffice systemd[1]: systemd-suspend.service: Succeeded.
Jul 04 08:08:51 christian-homeoffice systemd[1]: Finished Suspend.
Jul 04 08:08:51 christian-homeoffice systemd[1]: Stopped target Sleep.
Jul 04 08:08:51 christian-homeoffice systemd[1]: Reached target Suspend.
Jul 04 08:08:51 christian-homeoffice systemd[1]: Stopped target Suspend.
Jul 04 08:08:51 christian-homeoffice systemd-logind[926]: Operation 'sleep' finished.
Jul 04 08:08:51 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:52 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:52 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:52 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:52 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16
Jul 04 08:08:53 christian-homeoffice kernel: nouveau 0000:01:00.0: Xorg[1162]: nv50cal_space: -16