[ubuntu-x] Kernel Call for Testing(CFT): DRM stack

Luis R. Rodriguez mcgrof at gmail.com
Fri Apr 16 20:14:30 BST 2010

On Fri, Apr 16, 2010 at 11:45 AM, Bryce Harrington <bryce at canonical.com> wrote:
> On Fri, Apr 16, 2010 at 01:15:15AM -0700, Luis R. Rodriguez wrote:
>> Alright -- so HDMI audio issue resolved by upgrading my kernel to
>> 2.6.34-rc4. I'm all set :)
>> One small note: with the default Ubuntu kernel on 10.04 and the DRM
>> from 33.2 that it comes with my desktop kept a grey tone, as the old
>> default tones on Ubuntu 9.04. I thought that was just part of the
>> installation, but after installing 2.6.34 I now get the dark grey
>> tones for the desktop as it was on the beta2 LiveCD. So -- I did see
>> the dark grey tones on the LiveCD but not upon install. Not sure how
>> that happened and why upgrading my kernel "fixes" this :P
>> Anyway -- great stuff guys, now I only have to stick to a "stable" rc
>> kernel to get my hardware completely functional. It only took 2 years
>> after my original purchase.. but we go there.
> Audio is generally outside the scope of X.org; I know there seems to be
> some overlap in this case since the same cable transmits both video and
> audio, but as I understand it, video and audio are split out at the
> kernel level and the latter is directed off to the audio system, so it's
> not something we deal with in ubuntu-x.
> Since it sounds like you were able to resolve it by using a newer
> kernel, that suggests there is a kernel patch upstream needed to make
> your system work.  So you should report this to the kernel team.  If you
> are able to identify the specific patch(es) needed either by talking
> with a developer or doing git bisection, you can request the patch(es)
> added to the kernel.  Probably too late to get into the lucid release
> but maybe it'll qualify for an SRU.  Otherwise, the newer kernel bits
> will be present in the 10.04.1 kernel update presumably.

The patches in question are for radeon KMS, and as I was told this was
only recently fixed on 2.6.34-rc4, I'll review the git log on that
stuff, see if I can cherry pick some patches out. I'm not highly
motivated to do this though as things are working with a newer kernel
and I'm happy to use it but if I have some time maybe I will, I can
see this being useful for others.


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