https://bugs.freedesktop.org/show_bug.cgi?id=87728

            Bug ID: 87728
           Summary: Starting X produces a screen of static and GPU lockups
                    (Radeon HD 7970)
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: [email protected]
          Reporter: [email protected]
        QA Contact: [email protected]

I am still unable to get the radeonsi driver working with my Radeon HD 7970.
Bug 84186 was my previous attempt.

Right now I have installed:

kernel from Dave Airlie's drm-next, at commit 4e0cd68 (December 13 2014)
libgl1-mesa-glx 10.3.2-1
xserver-xorg-core 2:1.16.2.901-1
xserver-xorg-video-radeon 1:7.5.0-1

Apart from the kernel, the rest are Debian (jessie) packages.

With this configuration, X starts, but the display is a mess of grey static.
Through the static I can discern a large square which is apparently a mouse
cursor (moves when I move my mouse).

My syslog contains many complaints from the radeon driver which look like:

Dec 26 12:41:57 kano kernel: radeon 0000:01:00.0: ring 0 stalled for more than
10004msec
Dec 26 12:41:57 kano kernel: radeon 0000:01:00.0: GPU lockup (current fence id
0x0000000000000001 last fence id 0x0000000000000051 on ring 0)
Dec 26 12:41:58 kano kernel: [drm:si_gpu_check_soft_reset] MC busy: 0x00000548,
clearing.

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