[Quantal][SRU][PATCH 0/1] radeon/kms: force rn50 chip to always report connected on analog output

[leann.ogasawara at canonical.com]

From: Leann Ogasawara <leann.ogasawara at canonical.com>

== Quantal SRU Justification ==
A regression was discovered while testing HP SL4545 G7 systems with the
recent 3.5.0-22.34 Quantal kernel.  The regression results in a failure
to display a login screen/prompt upon booting.  Booting into a previous
3.5.0-17.28 Quantal kernel confirms the issue does not exit.  This issue
was bisected and it was determined the following commit introduced the
regression:

commit 83325d072185899b706de2956170b246585aaec9
Author: Egbert Eich <eich at suse.de>
Date: Wed Oct 24 18:29:49 2012 +0200

    DRM/Radeon: Fix Load Detection on legacy primary DAC.

== Fix ==
After additional testing, it was then confirmed that the following
upstream commit (which has also been CC'd to stable) resolves the issue:

commit 51861d4eebc2ddc25c77084343d060fa79f6e291
Author: Jerome Glisse <jglisse at redhat.com>
Date: Tue Jan 8 18:41:01 2013 -0500

    radeon/kms: force rn50 chip to always report connected on analog output

I would like to propose we pick up this fix as a pre-stable update and
respin Quantal so that this fix can land in the upcoming 12.04.2 point
release.

Herton, I assume you'll pick this up through your normal 3.5.y.z
process as it was CC'd to stable in the original upstream commit.

== Test Case ==
Boot eg. the 3.5.0-22.34 Quantal kernel on an HP SL4545 G7 system and
confirm the login screen/prompt is *not* displayed and ssh'ing into the
system one can see the following message in dmesg output:

[ 5.848056] No connectors reported connected with modes
[ 5.848059] [drm] Cannot find any crtc or sizes - going 1024x768

Boot a kernel with commit 51861d4e applied on an HP SL4545 G7 system and
confirm the login screen/prompt is displayed and the above message is
not seen in dmesg output.