[Bug 211033] [bisected][regression] amdgpu: *ERROR* Restoring old state failed with -12

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=211033

Jindrich Makovicka (makovick at gmail.com) changed:

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                 CC|                            |makovick at gmail.com

--- Comment #3 from Jindrich Makovicka (makovick at gmail.com) ---
On Tue, 5 Jan 2021 07:54:02 +0100, Greg Kroah-Hartman wrote:

> Can you test 5.11-rc to see if this issue is there as well?

Tested with 5.11.0-rc2 and 5600 XT, same issue.

"xset dpms force off" turns the display off and it won't come back,
with the same error in the syslog.

Jan  5 11:11:54 holly kernel: [drm:dm_restore_drm_connector_state
[amdgpu]] *ERROR* Restoring old state failed with -12

Can be worked around by

1) turning display power off completely
2) switching to console
3) turning display power on - linux console shows up
4) switching back to X

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