[Bug 55829] New: [Regression]Smokin-guns crash when change resolution

[Bug 55829] New: [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

          Priority: high
            Bug ID: 55829
          Assignee: dri-devel@lists.freedesktop.org
           Summary: [Regression]Smokin-guns crash when change resolution
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mengmeng.meng@intel.com
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: libdrm
           Product: DRI

System Environment:       
--------------------------
Platform: IVB,Piketon
Libdrm:    (master)libdrm-2.4.39-18-g844d75e5a0b3b8f3466a24256955e886275fb298
Mesa:    (master)87a34131c427b40a561cfef1513b446a0eeabc39
Xserver:(master)xorg-server-1.13.0-51-g4b7f00346daed20c96f3e8ea13ae411858a5424b
Xf86_video_intel:(master)2.20.9-47-gd73f5b5bb1a81421f1fdc3ac3b460a8ad90be0ad
Kernel:    (drm-intel-nightly) 4517f84e2981dddf4715997767c252a16579364b

Bug detailed description:
-----------------------------
Smokin-guns crash when change resolution on IVB and Piketon.
It's libdrm regression, the good commit is 2.4.31.

Reproduce steps:
----------------------------
1, xinit&
2, ./smokinguns.x86_64
3, change resolution(Settings/System/Video Mode)

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

--- Comment #1 from meng <mengmeng.meng@intel.com> ---
Created attachment 68393
  --> https://bugs.freedesktop.org/attachment.cgi?id=68393&action=edit
Xorg.0.log

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

Chris Wilson <chris@chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #2 from Chris Wilson <chris@chris-wilson.co.uk> ---
Maybe a bt from smokinguns as it crashes?

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

meng <mengmeng.meng@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #3 from meng <mengmeng.meng@intel.com> ---
bt
-----------------------------
#0  0x00007fffe66d280b in ?? ()
#1  0x0000000000000003 in ?? ()
#2  0x00000000023995e0 in ?? ()
#3  0x000000000278f2f0 in ?? ()
#4  0x0000000000000000 in ?? ()

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

--- Comment #4 from meng <mengmeng.meng@intel.com> ---
The problem also exists on most 3D games such as gl-117, warsow,Extreme
TuxRacer,padman.

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

--- Comment #5 from meng <mengmeng.meng@intel.com> ---
Xonotic (xonotic-linux64-sdl) can also repoduce this problem with above
version. Pls see Xorg.0.log and bt of xonotic.

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

--- Comment #6 from meng <mengmeng.meng@intel.com> ---
Created attachment 68594
  --> https://bugs.freedesktop.org/attachment.cgi?id=68594&action=edit
backtrace of xonotic

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

--- Comment #7 from meng <mengmeng.meng@intel.com> ---
Created attachment 68595
  --> https://bugs.freedesktop.org/attachment.cgi?id=68595&action=edit
Xorg.0.log of xonotic

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[Bug 55829] [Regression]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

--- Comment #8 from meng <mengmeng.meng@intel.com> ---
It's not libdrm regression. 
It's xf86_video_intel regression, and bisected show that xf86_video_intel
1675f441049d559d891fe378e437c12db21df9e7 is the first bad commit.

commit 1675f441049d559d891fe378e437c12db21df9e7
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jun 6 12:55:13 2012 +0100
    uxa/dri: Transfer reference of the new_back buffer to the flip_chain

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[Bug 55829] [Bisected]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

meng <mengmeng.meng@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[Regression]Smokin-guns     |[Bisected]Smokin-guns crash
                   |crash when change           |when change resolution
                   |resolution                  |
          Component|libdrm                      |DRM/other

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[Bug 55829] [Bisected]Smokin-guns crash when change resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=55829

meng <mengmeng.meng@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|dri-devel@lists.freedesktop |chris@chris-wilson.co.uk
                   |.org                        |
         QA Contact|                            |xorg-team@lists.x.org
            Product|DRI                         |xorg
          Component|DRM/other                   |Driver/intel

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