Bug#660803: oss-compat 3 problems with udev and breaks audio

[Michael Hatzold]

Hi Stephen,

thanks for your reply and your effort to solve the problem.


Am 29.06.2013, 17:33 Uhr, schrieb Stephen Kitt <sk...@debian.org>:

Hi Michael,

On Thu, 27 Jun 2013 21:22:25 +0200, "Michael Hatzold" <m.hatz...@web.de>
wrote:

Am 27.06.2013, 20:21 Uhr, schrieb Stephen Kitt <sk...@debian.org>:
> Could you possibly try the following?
> * re-install oss-compat 3
> * reboot (with the timeout)
> * run
>    sudo udevadm --debug trigger --verbose
>   to re-attempt to load the sound modules and trace what is attempted

As root in a VT I did run:

"udevadm --debug trigger --verbose"


do exactly.

Output in attachement. If it's not what you wanted pls let me know what to

Thanks, that is what I wanted although it's not enough to figure out the
problem - but Sven provided the missing info (thanks!).

If you don't mind, could you try the following workarounds?

The first is to drop the last softdep from oss-compat.conf (v3):

        softdep snd-pcm post: snd-pcm-oss
        softdep snd-mixer post: snd-mixer-oss

This version is working for me. No delay during boot and working sound even with oss-depending software (wmmixer).

That's the workaround provided by Sven, so it should work just fine.

The second is to add a variant of the last softdep:

        softdep snd-pcm post: snd-pcm-oss
        softdep snd-mixer post: snd-mixer-oss
        softdep snd-seq post: snd-seq-oss

Thisone is *not* working. Delay during boot an no sound.

This will help determine whether the initialisation lock-up is related to
loading snd-seq-midi... (Incidentally, the Debian kernels don't ship
snd-seq-oss.)

In the hope of providing usefull info I attach:

lsmod | grep oss >> lsmod.grep_oss.workaround1 (workaround #1 config)
lsmod | grep oss >> lsmod.grep_oss.workaround2 (workaround #2 config)


If you need further testing, just let me know.


Thanks,

Michael

I don't use a Debian stock kernel, but a siduction kernel which is vanilla plus whatever patches siduction applies. strace.workaround2 ( "strace -f modprobe snd-seq-oss" with workaround #2 config)

Thanks,

Stephen

lsmod.grep_oss.workaround1
Description: Binary data

lsmod.grep_oss.workaround2
Description: Binary data

strace.workaround2
Description: Binary data