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SubjectRe: ALSA regression in recent kernels: Intel HDA/ALC892 sound glitches
At Sun, 8 Jan 2012 09:49:27 +0000 (GMT),
Artem S. Tashkinov wrote:
> > On Jan 8, 2012, Takashi Iwai <tiwai@suse.de> wrote:
> >
> > At Thu, 5 Jan 2012 11:29:40 +0000 (GMT),
> > Artem S. Tashkinov wrote:
> > >
> > > Hello,
> > >
> > > Since kernel 3.0.11 I have quite terrible sound artifacts - random pops, clicks and
> > > short pauses (~500ms). Linux kernel 3.0.0 is *bug free*. So, some some of patches in
> > > kernel *3.0.11* broke the driver, the bug is, of course, present in kernels 3.1 and 3.2.
> >
> > Could you give alsa-info.sh output to check more details?
> > Also, any chance to identify which 3.0.x release breaks the things?
>
> alsa-info output was attached to my original mail posted into LKML, please check out
> you e-mail client.

Ah, OK, I'll check it later. I'm still on vacation so I can't check
in details.

> There are so few changes in Intel/Realtek HDA ALSA code between 3.0 and 3.0.11
> I thought you could identify the culprit just by looking at the list.

Well, it's not too easy since the problem isn't deterministic.
You can check the patches with ALSA: hda (or capital) and ALSA: pcm
prefix.


> ALSA: fm801: Fix double free in case of error in tuner detection
> ALSA: fm801: Gracefully handle failure of tuner auto-detect
> ALSA: HDA: Add new revision for ALC662
> ALSA: hda - Add position_fix quirk for Dell Inspiron 1010
> ALSA: hda - Add support for 92HD65 / 92HD66 family of codecs
> ALSA: HDA: Add support for IDT 92HD93
> ALSA: HDA: Cirrus - fix "Surround Speaker" volume control name
> ALSA: HDA: conexant support for Lenovo T520/W520
> ALSA: hda - Disable power-widget control for IDT 92HD83/93 as default
> ALSA: hda - Don't add elements of other codecs to vmaster slave
> ALSA: hda - Fix ADC input-amp handling for Cx20549 codec
> ALSA: HDA: No power nids on 92HD93
> ALSA: hda/realtek - Avoid bogus HP-pin assignment
> ALSA: hda/realtek - Fix auto-mute with HP+LO configuration
> ALSA: hda/realtek - Skip invalid digital out pins
> ALSA: hda - Remove bad code for IDT 92HD83 family patch
> ALSA: pcm - fix race condition in wait_for_avail()
> ALSA: ua101: fix crash when unplugging
> ALSA: usb-audio: Check for possible chip NULL pointer before clearing probing flag
> ALSA: usb-audio - Check the dB-range validity in the later read, too
> ALSA: usb-audio - clear chip->probing on error exit
> ALSA: usb-audio - Fix the missing volume quirks at delayed init
>
> If you have no ideas about which patch could have broken things, I will try to figure it out
> by bisecting.

That'll be helpful.


thanks,

Takashi


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