[Bug 56878] New: FireGL Mobility T2: WebGL under firefox16 freezes system

[Bug 56878] New: FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

          Priority: medium
            Bug ID: 56878
          Assignee: dri-devel@lists.freedesktop.org
           Summary: FireGL Mobility T2: WebGL under firefox16 freezes
                    system
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: miri@turboprinzessin.de
          Hardware: x86 (IA32)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 69702
  --> https://bugs.freedesktop.org/attachment.cgi?id=69702&action=edit
kernel messages of the crash

When opening http://lwn.net/Articles/522127/ with firefox16 the screen goes
black for a moment and then reappears for a few seconds after which it goes
black again. This cycle goes on a few times after which the system completely
locks up (even Magic Sysrq seems to have no effect).

I don't know if it is related but sometimes opening huge images in firefox
causes X to crash, too. This, however, doesn't freeze the kernel and beside the
crash itself everything works normally afterwards.

kernel: 3.6.6
xorg-server: 1.13.0
xf86-video-ati: 7.0.0
mesa: 9.0

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> ---
Does changing the agp mode help?  Set radeon.agpmode=x where x=-1,1,2,4,8.  -1
disables agp and uses the gpu's gart instead.

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #2 from miri@turboprinzessin.de ---
That is a kernel boot parameter and not a X config, isn't it?

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #3 from Alex Deucher <agd5f@yahoo.com> ---
correct.  e.g., add:
radeon.agpmode=-1
to the kernel command line in grub.

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #4 from miri@turboprinzessin.de ---
If I read dmesg correctly, it defaults to agp mode 2 but the bug still appears
with radeon.agpmode=1. Using radeon.agpmode=-1 avoids the freeze, though.
agpmode=-1 will be slower than the default, won't it? Anything else I can do to
help with fixing this bug?

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> ---
(In reply to comment #4)
> If I read dmesg correctly, it defaults to agp mode 2 but the bug still
> appears with radeon.agpmode=1. Using radeon.agpmode=-1 avoids the freeze,
> though.
> agpmode=-1 will be slower than the default, won't it? Anything else I can do
> to help with fixing this bug?

does agpmode=4 or 8 help?  agpmode=-1 may be slower, depends on the system and
what you are doing.  AGP is old and was kind of broken by design so I don't
think anyone is going to put much effort into making it work better at this
point.

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #6 from miri@turboprinzessin.de ---
agpmode=4 didn't help either. So are you saying that no one will fix this bug
and everyone with this configuration remains at risk that the system freezes?

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #7 from Alex Deucher <agd5f@yahoo.com> ---
(In reply to comment #6)
> agpmode=4 didn't help either. So are you saying that no one will fix this
> bug and everyone with this configuration remains at risk that the system
> freezes?

With AGP it depends on the motherboard, the card, the AGP mode, and the phase
of the moon.  Some combinations are stable, others are not.

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #8 from miri@turboprinzessin.de ---
The computer used to work quite nicely for a lot of OpenGL programs back then
when I could still use fglrx, so I find it hard to believe that buggy hardware
is at fault here.

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #9 from Alex Deucher <agd5f@yahoo.com> ---
(In reply to comment #8)
> The computer used to work quite nicely for a lot of OpenGL programs back
> then when I could still use fglrx, so I find it hard to believe that buggy
> hardware is at fault here.

There are probably ways to make your system work better, but due to the nature
of AGP and the fact that the hw is so old, I'm just saying it's not likely
anyone is going to put much time into it at this point.

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

--- Comment #10 from miri@turboprinzessin.de ---
Anything I can do to help? More info or enabling some debug output?

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[Bug 56878] FireGL Mobility T2: WebGL under firefox16 freezes system

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https://bugs.freedesktop.org/show_bug.cgi?id=56878

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

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

--- 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/313.

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