Andres Cimmarusti wrote:
> I installed two kernels from snapshots. Using date 2012-02-01 I was
> able to pull in a 3.1.8 kernel that exhibited the same problem as
> kernels 3.2.x.
> I also used data 20111201 and pulled in a debian 3.0.x kernel. This
> one didn't have the problem (as in the case of my own 3.0.20).
Thanks, that's very useful.
Perhaps v3.1-rc2~4^2~47^2~89 (ALSA: hda: HDMI: Support codecs with
fewer cvts than pins, 2011-07-01) is the problematic patch. Can you
check this guess, like so?
0. Prerequisites:
apt-get install git build-essential
1. Get a copy of the kernel:
git clone \
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
cd linux
Or, if you already have a copy, update it:
cd linux
git fetch origin
2. Try the suspect commit:
git checkout v3.1-rc2~4^2~47^2~89
cp /boot/config-$(uname -r) .config; # current configuration
make localmodconfig; # optional: minimize configuration
make deb-pkg; # optionally with -j<num> for parallel build
dpkg -i ../<name of package>
reboot
aplay -l
3. Try without it:
cd linux
git reset --keep HEAD^; # checking out the immediately previous version
make deb-pkg; # maybe with -j4
dpkg -i ../<name of package>
reboot
aplay -l
If the suspect commit reproduces the problem and its parent does not,
please contact Stephen Warren <[email protected]> for advice, cc-ing
Takashi Iwai <[email protected]>, [email protected], and either
me or this bug log so we can track it. Be sure to mention:
- steps to reproduce the problem, expected result, actual result, and
how the difference indicates a bug
- which kernel versions you have tested and what happened with each
- where one can find your alsa-info.sh output with a problematic and
unproblematic kernel (e.g., attaching them should be fine)
- what kinds of tests you would be able to carry out (e.g., are you
able to test patches for debugging if provided?)
- any other weird observations or workarounds
- a link to http://bugs.debian.org/660111 for context
If my guess is wrong, we can try using "git bisect" for a more
systematic search (see the git-bisect(1) manpage for details).
Hope that helps,
Jonathan
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