From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 48422] Radeon KMS fails on Radeon X850XT (R480) graphics card
Date: Wed, 18 Apr 2012 22:13:54 +0000
Message-ID: <bug-48422-502-mgkBXsZHX4@http.bugs.freedesktop.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=48422

Jonathan Nieder <jrnieder@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Jonathan Nieder <jrnieder@gmail.com> 2012-04-18 15:13:54 PDT ---
Mike Brodbelt wrote[1]:

> I have done basic testing. Pulling a kernel source tree for 3.3.y and
> applying the patch results in a new kernel which now boots
> successfully.
>
> Currently running kernel is :-
>
> $ uname -a
> Linux mordor 3.3.1+ #5 SMP Tue Apr 10 01:53:45 BST 2012 x86_64 GNU/Linux
>
> Which is working.... I've not tested this tree without the patch yes,
> so can't be 100% certain, but that patch is looking pretty convincing
> so far.

So it looks like this is fixed by

commit afceb9319f21b18ee3bc15ee9a5f92e18ef8a8c9
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Tue Apr 3 17:05:41 2012 -0400

    drm/radeon/kms: fix DVO setup on some r4xx chips

    Some r4xx chips have the wrong frev in the
    DVOEncoderControl table.  It should always be 1
    on r4xx.  Fixes modesetting on DVO on r4xx chips
    with the bad frev.

    Reported by twied on #radeon.

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Dave Airlie <airlied@redhat.com>

which is part of v3.4-rc3.

[1] http://bugs.debian.org/667799#36

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