Also, there is a patch in the upstream 3.1-rc10 kernel which may fix this issue:
author Alex Deucher Tue, 4 Oct 2011 16:23:24 +0000 (12:23 -0400)
committer Dave Airlie Wed, 5 Oct 2011 09:31:40 +0000 (10:31 +0100)
commit 6777a4f6898a53974ef7fe7ce09ec41fae0f32db
tree e5680a33625e3a69d78c11e1fb56849e2c573beb
parent 4f332844cc87c5f99c5300f788abbe8a8c731390
drm/radeon/kms: fix dp_detect handling for DP bridge chips
The HPD pin is not reliable for detecting whether a monitor
is connected or not. Skip HPD and just use DDC or load
detection.
Fixes phantom VGA connected bugs.
[Michel: fixes phantom VGA bugs on his llano system.]
Signed-off-by: Alex Deucher
Reviewed-by: Michel Dänzer
Tested-by: Michel Dänzer
Cc: <email address hidden>
Signed-off-by: Dave Airlie
A PPA of this kernel is available at http://kernel.ubuntu.com/~kernel-ppa/mainline/
It has also been cc'd to the stable kernel tree and should therefore eventually make it's way to oneiric-updates as an SRU.
Also, there is a patch in the upstream 3.1-rc10 kernel which may fix this issue:
author Alex Deucher Tue, 4 Oct 2011 16:23:24 +0000 (12:23 -0400) 74ef7fe7ce09ec4 1fae0f32db 9d78c11e1fb5684 9e2c573beb 99c5300f788abbe 8a8c731390
committer Dave Airlie Wed, 5 Oct 2011 09:31:40 +0000 (10:31 +0100)
commit 6777a4f6898a539
tree e5680a33625e3a6
parent 4f332844cc87c5f
drm/radeon/kms: fix dp_detect handling for DP bridge chips
The HPD pin is not reliable for detecting whether a monitor
is connected or not. Skip HPD and just use DDC or load
detection.
Fixes phantom VGA connected bugs.
[Michel: fixes phantom VGA bugs on his llano system.]
Signed-off-by: Alex Deucher
Reviewed-by: Michel Dänzer
Tested-by: Michel Dänzer
Cc: <email address hidden>
Signed-off-by: Dave Airlie
A PPA of this kernel is available at http:// kernel. ubuntu. com/~kernel- ppa/mainline/
It has also been cc'd to the stable kernel tree and should therefore eventually make it's way to oneiric-updates as an SRU.