[alsa-devel] v2.6.25.3 BUG (due to usb audio device?)

[Takashi Iwai]

At Sat, 17 May 2008 07:54:04 -0700,
Avuton Olrich wrote:
> 
> On Sat, May 17, 2008 at 7:50 AM, Avuton Olrich <avuton at gmail.com> wrote:
> > On Tue, May 13, 2008 at 4:25 AM, Takashi Iwai <tiwai at suse.de> wrote:
> >> At Sun, 11 May 2008 09:53:01 -0700,
> >> Avuton Olrich wrote:
> >>>
> >>> This locks up KDE due to kmixer somehow trying to stay attached to the
> >>> audio device after resume from suspend-to-disk. This is the second
> >>> time of dealing with this (or a similar bug) with the usb audio
> >>> device:
> >>>
> >>> http://mailman.alsa-project.org/pipermail/alsa-devel/2008-March/006867.html
> >>>
> >>> I got it working by using the head of the git tree recommended in that
> >>> thread (unfortunately I don't have the hash it was related to).
> >>
> >> If the recent git works, it should be the series of my patches:
> >>
> >> 73d38b13ffb105ab633bd91969c8d218b2de38d4
> >>        [ALSA] Fix the race of card instance unregistration
> >> f18638dcf0c481eca2430206ebcdc7295aec8623
> >>        [ALSA] Clean up snd_card_free*()
> >> 9eb70e68f38bbc5996a2193e7b7dc0b5487a08cb
> >>        [ALSA] usb-audio - Fix race in reconnection
> >>
> >> But the patches are intrusive, and I'm not keen on applying them to
> >> stable trees...
> >
> > OK, finally had the time to try the newer master and here's what I get now;
> >
> > I suspend and resume fine, but the sound card no longer works again
> > after resume and the only thing I see in the dmesg is:
> >
> > [  125.873947] usb 3-1: reset full speed USB device using ohci_hcd and address 2
> > [  126.017265] snd-usb-audio 3-1:1.0: no reset_resume for driver snd-usb-audio?
> > [  126.017265] snd-usb-audio 3-1:1.1: no reset_resume for driver snd-usb-audio?
> > [  126.017265] snd-usb-audio 3-1:1.2: no reset_resume for driver snd-usb-audio?
> 
> Forgot to mention the hash for this one is linus tree:
> f26a3988917913b3d11b2bd741601a2c64ab9204

It's:
    Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

Are you using ppc?  Otherwise I suspect it's due to the addition of
suspend/resume callbacks in usbaudio.c.


Takashi