[Bug 2025124] Re: PC frequently fails to wake from suspend with kernel 5.4

I found the change that caused this regression.

Reported upstream:
https://gitlab.freedesktop.org/drm/nouveau/-/issues/362


** Bug watch added: gitlab.freedesktop.org/drm/nouveau/-/issues #362
https://gitlab.freedesktop.org/drm/nouveau/-/issues/362

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https://bugs.launchpad.net/bugs/2025124

Title:
PC frequently fails to wake from suspend with kernel 5.4

Status in linux package in Ubuntu:
Confirmed

Bug description:
Ever since upgrading from Bionic to Focal, my machine frequently
(multiple times per week) fails to wake up from suspend with the
default 5.4 kernel (linux-image-generic).

When booting the 4.15 kernel from Bionic that I still have installed
(linux-image-4.15.0-46-generic), suspend and wake-up works reliably
again.

The symptoms of the failure to wake up are that the machine powers up
(fans, LEDs), but the screen stays black. Num lock LED on the keyboard
is ON and cannot be toggled. The Machine cannot be pinged.

After hard-resetting the machine, the last entry in journalctl from
the previous boot is "kernel: PM: suspend entry (deep)".

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-generic 5.4.0.152.149
ProcVersionSignature: Ubuntu 5.4.0-152.169-generic 5.4.235
Uname: Linux 5.4.0-152-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: christian 2130 F.... pulseaudio
/dev/snd/controlC1: christian 2130 F.... pulseaudio
/dev/snd/controlC0: christian 2130 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Tue Jun 27 09:02:07 2023
InstallationDate: Installed on 2014-09-16 (3205 days ago)
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MachineType: Gigabyte Technology Co., Ltd. H97M-D3H
ProcFB: 0 nouveaudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-152-generic root=UUID=ef54dd1e-0d88-4541-a64c-71f83163f2f2 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-152-generic N/A
linux-backports-modules-5.4.0-152-generic N/A
linux-firmware 1.187.39
RfKill:

SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2023-04-03 (84 days ago)
dmi.bios.date: 06/03/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F3
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: H97M-D3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3:bd06/03/2014:svnGigabyteTechnologyCo.,Ltd.:pnH97M-D3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH97M-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: H97M-D3H
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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