[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

            Bug ID: 94933
           Summary: [RV610] Freeze when turning on an external monitor
                    after resume from suspend
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: nicolamori@aol.com

I have a laptop with a Mobility Radeon HD3470 (RV610) and Plasma 5.6.2 as
desktop environment. After suspending to RAM and resuming, I experience a
system freeze when trying to switch to a dual monitor setup using an external
monitor connected to the VGA output. The dual monitor can be turned on without
problems before the suspend/resume cycle.
I don't know which logs/information could be useful to diagnose the problem, so
I will provide it on demand. Thanks.

System details
--------------
VGA: Mobility Radeon HD3470 (RV610)
OS: ArchLinux 64 bit, kernel 4.4.7, xf86-video-ati 7.7.0
Desktop: Plasma 5.6.2 (with KF5 5.21 and Qt 5.6.0)

Steps to reproduce
------------------
- Start the system with only the laptop panel turned on
- Suspend to RAM and then resume
- Connect an external monitor
- Enable the external monitor with xrandr or with the KCM module (System
settings -> Display and Monitor -> Display configuration)

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your xorg log and dmesg output.  Does the whole system freeze or
just X?

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #2 from Nicola Mori <nicolamori@aol.com> ---
Created attachment 122958
  --> https://bugs.freedesktop.org/attachment.cgi?id=122958&action=edit
dmesg

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #3 from Nicola Mori <nicolamori@aol.com> ---
Created attachment 122959
  --> https://bugs.freedesktop.org/attachment.cgi?id=122959&action=edit
Xorg.0.log

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #4 from Nicola Mori <nicolamori@aol.com> ---
The freeze is only related to X, I guess. If, after triggering it, I'm quick
enough to switch to a tty then the system is still responsive, I can log in and
input commands to the shell (this is how I got the dmesg after the freeze). If
instead I wait a bit after the freeze then the keyboard and the mouse become
unresponsive, and pressing Ctrl+Alt+F2 has no effect. The system gets stuck
with a black screen, the mouse cursor can still be moved around but clicks have
no effect. The same happens when switching back to X from the tty after the
"quick switch to tty" mentioned above.

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
The X desktop size changes from 1280x800 to 3200x1080 around the time the GPU
hangs. Can you also reproduce the problem by only changing the desktop size,
without changing anything about the external monitor, e.g. using something like

xrandr --fb 3200x1080

?

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #6 from Nicola Mori <nicolamori@aol.com> ---
Changing the desktop size screws the screen but the system is still responsive.
I can go back to a fully working situation with

xrandr --fb 1280x800

I attach the relevant parts of dmesg and Xorg.0.log.

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #7 from Nicola Mori <nicolamori@aol.com> ---
Created attachment 122961
  --> https://bugs.freedesktop.org/attachment.cgi?id=122961&action=edit
dmesg on screen resize

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #8 from Nicola Mori <nicolamori@aol.com> ---
Created attachment 122962
  --> https://bugs.freedesktop.org/attachment.cgi?id=122962&action=edit
Xorg.0.log for screen resize

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #9 from Alex Deucher <alexdeucher@gmail.com> ---
Does disabling dpm fix the issue?  remove radeon.dpm=1 from your kernel command
line in grub.  dpm is disabled by default on r6xx due to stability issues.

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

--- Comment #10 from Nicola Mori <nicolamori@aol.com> ---
Yes, disabling dpm the problem vanishes.

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[Bug 94933] [RV610] Freeze when turning on an external monitor after resume from suspend

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https://bugs.freedesktop.org/show_bug.cgi?id=94933

Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #11 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/707.

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