[Bug 90187] New: [PRIME] Xorg segfaults during startup when loading the xf86-video-ati driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90187

            Bug ID: 90187
           Summary: [PRIME] Xorg segfaults during startup when loading the
                    xf86-video-ati driver
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: mike at fireburn.co.uk
        QA Contact: xorg-team at lists.x.org

Created attachment 115354
  --> https://bugs.freedesktop.org/attachment.cgi?id=115354&action=edit
Xorg.0.log Broken

The xf86-video-ati driver has been segfaulting on me the last few days I've git
bisected to:

# bad: [80f3d727f93cb6efedd2b39338d2301035965fe2] On screen resize, clear the
new buffer before displaying it
git bisect bad 80f3d727f93cb6efedd2b39338d2301035965fe2
# good: [43159ef400c3b18b9f4d3e6fa1c4aef2d60d38fe] Add Option "TearFree" v4
git bisect good 43159ef400c3b18b9f4d3e6fa1c4aef2d60d38fe
# good: [37874a4eeace5df04b02c8fc28f67b824e3f0f5f] Defer initial
drmmode_copy_fb call until root window creation
git bisect good 37874a4eeace5df04b02c8fc28f67b824e3f0f5f
# good: [37874a4eeace5df04b02c8fc28f67b824e3f0f5f] Defer initial
drmmode_copy_fb call until root window creation
git bisect good 37874a4eeace5df04b02c8fc28f67b824e3f0f5f
# good: [37874a4eeace5df04b02c8fc28f67b824e3f0f5f] Defer initial
drmmode_copy_fb call until root window creation
git bisect good 37874a4eeace5df04b02c8fc28f67b824e3f0f5f
# bad: [a4a8cdbcc10c1c5f07485a2af9e9e81e490c3e1d] Update scanout pixmap
contents before setting a mode with it
git bisect bad a4a8cdbcc10c1c5f07485a2af9e9e81e490c3e1d
# bad: [a4a8cdbcc10c1c5f07485a2af9e9e81e490c3e1d] Update scanout pixmap
contents before setting a mode with it
git bisect bad a4a8cdbcc10c1c5f07485a2af9e9e81e490c3e1d
# bad: [673e1c7637687c74fc9bdeeeffb7ace0d04b734f] Defer initial modeset until
the first BlockHandler invocation
git bisect bad 673e1c7637687c74fc9bdeeeffb7ace0d04b734f
# first bad commit: [673e1c7637687c74fc9bdeeeffb7ace0d04b734f] Defer initial
modeset until the first BlockHandler invocation

I'm unable to revert the first bad commit- I've also not seen anyone complain
so I'm assuming it's PRIME related:

00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller [8086:0116] (rev 09)
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] [1002:6741] (rev
ff)

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