[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

            Bug ID: 91291
           Summary: kernel panic and freeze on resume in [radeon] [ttm]
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: kparal@redhat.com

A few times in a month, my computer fails to resume and just hangs, with black
screen, and needs hard reset. This time I got lucky and kernel panic text was
shown on my screen, so I took a shot of it. There's a lot of [ttm] and [radeon]
strings in it, so it looks like it is related to my Radeon card. The text on
the screen has "scrolled" once in a while (it seemed to be rotation), I hope I
captured everything important.

Components:
Radeon R9 270:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Curacao PRO [Radeon R7 370 / R9 270/370 OEM] [1002:6811]
fully updated Fedora 22:
kernel-4.0.7-300.fc22.x86_64
xorg-x11-server-Xorg-1.17.2-1.fc22.x86_64
xorg-x11-drv-ati-7.5.0-3.fc22.x86_64
libdrm-2.4.61-3.fc22.x86_64
mesa-dri-drivers-10.6.1-1.20150629.fc22.x86_64


Please tell me if I can add more useful information somehow. That issue is not
easily reproducible, it happens rarely and usually I just see a black screen,
so I can't even tell whether it is always the same issue or not.

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

--- Comment #1 from Kamil Páral <kparal@redhat.com> ---
Created attachment 117026
  --> https://bugs.freedesktop.org/attachment.cgi?id=117026&action=edit
kernel trace - shot1

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

--- Comment #2 from Kamil Páral <kparal@redhat.com> ---
Created attachment 117027
  --> https://bugs.freedesktop.org/attachment.cgi?id=117027&action=edit
kernel trace - shot2

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
The traces look like some kind of deadlock in
on_each_cpu/smp_call_function_many, not a problem in TTM or the radeon driver.
Please report that problem against the kernel.

As for the hang on resume, can you still log into the system via ssh when that
happens, or does it at least respond to ping?

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

Kamil Páral <kparal@redhat.com> changed:

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

--- Comment #4 from Kamil Páral <kparal@redhat.com> ---
I can't say for this exact case, but usually the system is dead, doesn't even
respond to pings.

I'll report against the kernel, thank you. Would you happen to know against
which product and component this should be reported against?
https://bugzilla.kernel.org/enter_bug.cgi

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Kamil Páral from comment #4)
> I can't say for this exact case, but usually the system is dead, doesn't
> even respond to pings.

Note that that sounds like it might be a different problem than the one shown
in the attached traces.


> I'll report against the kernel, thank you. Would you happen to know against
> which product and component this should be reported against?
> https://bugzilla.kernel.org/enter_bug.cgi

Not sure. :( In the worst case, you could try Other / Other. But it might be
better to contact the maintainers / maintenance mailing lists of the files
containing the on_each_cpu/smp_call_function_many functions directly by e-mail.
You can use scripts/get_maintainer.pl to find out what those are.

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

--- Comment #6 from Kamil Páral <kparal@redhat.com> ---
Good to know about that script. Thanks for help.

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[Bug 91291] kernel panic and freeze on resume in [radeon] [ttm]

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https://bugs.freedesktop.org/show_bug.cgi?id=91291

--- Comment #7 from Kamil Páral <kparal@redhat.com> ---
For the record, this got reported here:
https://bugzilla.kernel.org/show_bug.cgi?id=102321

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