[Bug 201505] New: Resume from suspend does not power up the display

[Bug 201505] New: Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

            Bug ID: 201505
           Summary: Resume from suspend does not power up the display
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.19
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: 0xe2.0x9a.0x9b@gmail.com
        Regression: No

Resuming the machine from suspend-to-ram no longer restores power to the
display attached to an AMD GPU in Linux 4.19 (assuming the display has switched
to sleep mode by itself because the computer hasn't been in use for a while).

If the display is still powered on when resuming, it ends up blank.

Linux 4.18 did not contain this bug.

Kernel: 4.19
Module: amdgpu
GPU: R9 390

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[Bug 201505] Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

--- Comment #1 from Michel Dänzer (michel@daenzer.net) ---
Please attach the output of dmesg.

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[Bug 201505] Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

--- Comment #2 from Jan Ziak (http://atom-symbol.net) (0xe2.0x9a.0x9b@gmail.com) ---
Created attachment 279135
  --> https://bugzilla.kernel.org/attachment.cgi?id=279135&action=edit
dmesg

dmesg without any resume-from-suspend.

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[Bug 201505] Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

--- Comment #3 from Jan Ziak (http://atom-symbol.net) (0xe2.0x9a.0x9b@gmail.com) ---
Created attachment 279137
  --> https://bugzilla.kernel.org/attachment.cgi?id=279137&action=edit
dmesg with resume-from-suspend

dmesg with resume-from-suspend. It contains 2 amdgpu failures to send a
message.

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[Bug 201505] Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

Alex Deucher (alexdeucher@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #4 from Alex Deucher (alexdeucher@gmail.com) ---
Can you bisect?

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[Bug 201505] Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

--- Comment #5 from Jan Ziak (http://atom-symbol.net) (0xe2.0x9a.0x9b@gmail.com) ---
Created attachment 279151
  --> https://bugzilla.kernel.org/attachment.cgi?id=279151&action=edit
bisect.log

I bisected the issue but encountered some inconsistencies along the way:

- The bisected commit ends up with a white display after resume-from-suspend,
while I was expecting a blank display.

- I started bisecting with v4.18 good and v4.19 bad. The bisected commit has
date 25 may 2018, while 4.18 has been released on 12 aug 2018.

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[Bug 201505] Resume from suspend does not power up the display

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=201505

Jan Ziak (http://atom-symbol.net) (0xe2.0x9a.0x9b@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |OBSOLETE

--- Comment #6 from Jan Ziak (http://atom-symbol.net) (0xe2.0x9a.0x9b@gmail.com) ---
I am resolving this issue as obsolete because I stopped using R9 390 as a
primary GPU some time ago. If somebody can still reproduce this bug please
reopen this issue.

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