https://bugzilla.kernel.org/show_bug.cgi?id=218124
Bug ID: 218124
Summary: [REGRESSION]: acpi/nouveau: Hardware unavailable upon
resume or suspend fails
Product: ACPI
Version: 2.5
Hardware: Intel
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Power-Video
Assignee: acpi_power-vi...@kernel-bugs.osdl.org
Reporter: wri...@owenh.net
Regression: No
#regzbot introduced: 89c290ea758911e660878e26270e084d862c03b0
#regzbot link: https://gitlab.freedesktop.org/drm/nouveau/-/issues/273
## Reproducing
1. Boot system to framebuffer console.
2. Run `systemctl suspend`. If undocked without secondary display, suspend
fails. If docked with secondary display, suspend succeeds.
3. Resume from suspend if applicable.
4. System is now in a broken state.
## Testing
- culprit commit is 89c290ea758911e660878e26270e084d862c03b0
- v6.6 fails
- v6.6 with culprit commit reverted does not fail
- Compiled with
<https://gitlab.freedesktop.org/drm/nouveau/uploads/788d7faf22ba2884dcc09d7be931e813/v6.6-config1>
## Hardware
- ThinkPad W530 2438-52U
- Dock with Nvidia-connected DVI ports
- Secondary display connected via DVI
- Nvidia Optimus GPU switching system
```console
$ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K2000M]
(rev a1)
```
## Decoded logs from v6.6
- System is not docked and fails to suspend:
<https://gitlab.freedesktop.org/drm/nouveau/uploads/fb8fdf5a6bed1b1491d2544ab67fa257/undocked.log>
- System is docked and fails after resume:
<https://gitlab.freedesktop.org/drm/nouveau/uploads/cb3d5ac55c01f663cd80fa000cd6a3b5/docked.log>
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