[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

            Bug ID: 100759
           Summary: [r600] System freeze on resume from sleep on battery
                    with DPM enabled and linux 4.10
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: nicolamori@aol.com

Created attachment 130983
  --> https://bugs.freedesktop.org/attachment.cgi?id=130983&action=edit
journalctl log for failed resume

Since linux 4.10.1 my system freezes every time when resuming from sleep
(suspend to ram) while on battery. The screen either remains black or displays
garbage, and the only thing to do is a hard poweroff. The problem does not show
up when either:

- running on AC or
- using linux 4.9 (tested with 4.9.11) or
- DPM is not enabled (radeon.dpm=0)

I checked journalctl but it does not contain anything useful. I attach the last
part of the log, starting from the suspend request; it seems nothing from the
failed resume process is logged.

System details:

- Archlinux x86_64
- Mobility Radeon HD 3470
- Plasma desktop 5.9.4

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

--- Comment #1 from Nicola Mori <nicolamori@aol.com> ---
I found the time to bisect and found that the culprit is:

commit 1c331f75aa6ccbf64ebcc5a019183e617c9d818a
Author: Lucas Stach <dev@lynxeye.de>
Date:   Sun Oct 23 01:05:33 2016 +0200

    drm/radeon/pm: autoswitch power state when in balanced mode

    The current default of always using the performance power state leads
    to increased power consumption of mobile devices, which have a dedicated
    battery power state. Switch between the performance and battery power
    state automatically, dpending on the current AC power status, when the
    user asked for the balanced power state.

    The user can still override this logic by asking for the performance
    or battery power state explicitly.

    Tested-by: Michel Dänzer <michel.daenzer@amd.com>
    Acked-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Lucas Stach <dev@lynxeye.de>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

I don't have the skills to understand what's broken, but I can test an eventual
patch if someone provides it. Thanks.

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

--- Comment #2 from Nicola Mori <nicolamori@aol.com> ---
Is there any chance that this bug report will be addressed?

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
Sorry, slipped off my radar.  I just sent the revert out for review.

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

--- Comment #4 from Nicola Mori <nicolamori@aol.com> ---
Hi Alex, any news about the revert patch? Is there any estimate about if and
when it will be mainlined? Thanks.

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> ---
In 4.16 and will be flowing back to stable as well:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=53bf277b487eb5ae6695db01bede0fe406792119

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

Alex Deucher <alexdeucher@gmail.com> changed:

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

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[Bug 100759] [r600] System freeze on resume from sleep on battery with DPM enabled and linux 4.10

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https://bugs.freedesktop.org/show_bug.cgi?id=100759

--- Comment #6 from Nicola Mori <nicolamori@aol.com> ---
Wow, thanks! I finally can update from kernel 4.9.

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