* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
[not found] <bug-36037-502@http.bugs.freedesktop.org/>
@ 2011-04-07 9:58 ` bugzilla-daemon
2011-04-07 14:27 ` bugzilla-daemon
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From: bugzilla-daemon @ 2011-04-07 9:58 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=36037
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Product|xorg |DRI
Version|git |unspecified
Component|Driver/Radeon |DRM/Radeon
AssignedTo|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop
| |.org
QAContact|xorg-team@lists.x.org |
--- Comment #2 from Michel Dänzer <michel@daenzer.net> 2011-04-07 02:58:34 PDT ---
Looks like one of the pointers in radeon_legacy_backlight_get_brightness() is
NULL, but I'm not sure which one that could be. Johannes, can you add some
debugging output to see which one it is?
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
[not found] <bug-36037-502@http.bugs.freedesktop.org/>
2011-04-07 9:58 ` [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code bugzilla-daemon
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From: bugzilla-daemon @ 2011-04-07 14:27 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=36037
Johannes Obermayr <johannesobermayr@gmx.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #45356|0 |1
is obsolete| |
--- Comment #3 from Johannes Obermayr <johannesobermayr@gmx.de> 2011-04-07 07:27:13 PDT ---
Created an attachment (id=45373)
--> (https://bugs.freedesktop.org/attachment.cgi?id=45373)
dmesg
(In reply to comment #2)
> Looks like one of the pointers in radeon_legacy_backlight_get_brightness() is
> NULL, but I'm not sure which one that could be. Johannes, can you add some
> debugging output to see which one it is?
boot parameter: drm.debug=255 nomodeset 3
then a 'rmmod radeon'
and finally a 'modprobe radeon'
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
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https://bugs.freedesktop.org/show_bug.cgi?id=36037
--- Comment #4 from Michel Dänzer <michel@daenzer.net> 2011-04-07 07:51:26 PDT ---
Thanks, but I mean modifying radeon_legacy_backlight_get_brightness() to print
the value of each pointer before dereferencing it. If you don't know how to do
that, I can try whipping up a test patch.
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
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From: bugzilla-daemon @ 2011-04-07 15:35 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=36037
--- Comment #5 from Michel Dänzer <michel@daenzer.net> 2011-04-07 08:35:56 PDT ---
Created an attachment (id=45386)
View: https://bugs.freedesktop.org/attachment.cgi?id=45386
Review: https://bugs.freedesktop.org/review?bug=36037&attachment=45386
Debugging patch
This patch (only compile tested) should print the pointer values before
referencing them, and bail if one of them is NULL. This should also avoid the
immediate crash, but it might still crash elsewhere later on.
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
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From: bugzilla-daemon @ 2011-04-07 17:03 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=36037
Johannes Obermayr <johannesobermayr@gmx.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #45373|0 |1
is obsolete| |
--- Comment #6 from Johannes Obermayr <johannesobermayr@gmx.de> 2011-04-07 10:03:15 PDT ---
Created an attachment (id=45392)
--> (https://bugs.freedesktop.org/attachment.cgi?id=45392)
dmesg
dmesg output with applied Debugging patch
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
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https://bugs.freedesktop.org/show_bug.cgi?id=36037
--- Comment #7 from Johannes Obermayr <johannesobermayr@gmx.de> 2011-04-07 11:00:32 PDT ---
After a second and third try (after reboots) I got:
[drm] pdata=00000072
I assume it is the value I receive each time now.
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
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From: bugzilla-daemon @ 2011-04-14 14:59 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=36037
--- Comment #8 from Michel Dänzer <michel@daenzer.net> 2011-04-14 07:59:21 PDT ---
So bl_get_data() returns NULL in radeon_legacy_backlight_get_brightness(). I'm
stumped as to how that could happen... Any ideas, Matthew?
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
[not found] <bug-36037-502@http.bugs.freedesktop.org/>
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From: bugzilla-daemon @ 2011-04-14 15:29 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=36037
--- Comment #9 from Matthew Garrett <mjg59@srcf.ucam.org> 2011-04-14 08:29:30 PDT ---
That's bizarre. I can't see any obvious way this could happen.
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^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug 36037] RV250Lf: airlied/drm-fixes branch crashes in new backlight code
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From: bugzilla-daemon @ 2012-01-04 13:06 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=36037
Johannes Obermayr <johannesobermayr@gmx.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #10 from Johannes Obermayr <johannesobermayr@gmx.de> 2012-01-04 05:06:07 PST ---
It does not crash when building against recent kernels.
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