[Bug 100968] New:=?UTF-8?Q?=20xf86=2Dvideo=2Damdgpu=2D1=2E3=2E0=20=E2=80=94=20Xorg?=: Segmentation fault

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100968

            Bug ID: 100968
           Summary: xf86-video-amdgpu-1.3.0 — Xorg: Segmentation fault
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: bts+freedesktop at 31c0.net
        QA Contact: xorg-team at lists.x.org
                CC: bts+freedesktop at 31c0.net

Created attachment 131259
  --> https://bugs.freedesktop.org/attachment.cgi?id=131259&action=edit
bisect-protocol.log

Environment
-----------
OS:     Gentoo Linux (several kernel versions)
GPU:    AMD, Inc. [AMD/ATI] Tahiti LE [Radeon HD 7870 XT] [1002:679e]
Driver: tag xf86-video-amdgpu-1.3.0 and master

Description
-----------
With driver beyond tag xf86-video-amdgpu-1.2.0 (precisely from commit b5c18947)
I got a “Segmentation fault at address 0x0” on Xorg start.

Probably the mentioned commit is the culprit. See my attached
    bisect-protocol.log
but be lenient with me — it’s my first bisect log.

Thanks in advance and please let me know when I can do something more within
the limits of my resources.

Addendum
--------
FWIW: I was never be able (for nearly three years) to get hardware acceleration
to work with this GPU and the open-source driver. Therefore the setting:
    Option "Accel" "no"
is currently and must always be applied.

Otherwise the screen goes black, keyboard and mouse will be lost after invoking
`startx`. Thus, only a hard reboot remains to get access again and SSHing into
this PC is useless because I have no clue how to debug those behaviour.

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