[Bug 88781] New: black screen when starting X with radeon

* [Bug 88781] New: black screen when starting X with radeon
@ 2014-11-23 16:59 bugzilla-daemon
  2014-11-23 17:15 ` [Bug 88781] " bugzilla-daemon
  2014-11-25  2:57 ` bugzilla-daemon
  0 siblings, 2 replies; 3+ messages in thread
From: bugzilla-daemon @ 2014-11-23 16:59 UTC (permalink / raw)
  To: dri-devel

https://bugzilla.kernel.org/show_bug.cgi?id=88781

            Bug ID: 88781
           Summary: black screen when starting X with radeon
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.17.3
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: serge.yquel@laposte.net
        Regression: No

Hello,

Since the 3.17.3 kernel when starting X,I got a black screen with no tty
acces,with stable mesa or mesa-git.

If i switch to catalyst,all is fine,also after downgrading the kernel to 3.17.2
i can start X with mesa drivers.

I did a git bisect and the result is:

ffe0245532b98efc4bc0e06f29c51d3f0e471152 is the first bad commit
commit ffe0245532b98efc4bc0e06f29c51d3f0e471152
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Mon Oct 13 11:51:50 2014 -0400

    drm/radeon: fix speaker allocation setup

    commit 4910403836ded89803fab201d4b5caaa85de3a89 upstream.

    If the sad_count is 0, set the hw to stereo and change
    the error message to a warn.  A lot of monitors don't
    set the speaker allocation block.

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

:040000 040000 e74a4921582bc648dac6568df703f3a857a121d7
c99bee9a0eab114373fb523803be6e7c4c6cf218 M    drivers

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