linux-kernel - Re: [GIT PULL] sound updates #2 for 2.6.40

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Date:	Fri, 27 May 2011 17:09:04 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...mlogic.co.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] sound updates #2 for 2.6.40

On Fri, May 27, 2011 at 5:02 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>>
>>  af4ccf4f86c0..9477c58e3308
>>
>> probably it's that last one ("ALSA: hda - Reorganize controller quriks
>> with bit flags").
>
> Confirmed. Also confirmed that reverting that from current tip of git
> fixes the issue.

Just to clarify: it's commit 9477c58e3308f54a108a5d1eb9621830b329b0ca
that is bad.

It causes odd stuttering/echoing effects on my bog-standard Westmere setup:

  00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 12)
  00:02.0 VGA compatible controller: Intel Corporation Core Processor
Integrated Graphics Controller (rev 12)
  00:16.0 Communication controller: Intel Corporation 5 Series/3400
Series Chipset HECI Controller (rev 06)
  00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series
Chipset USB2 Enhanced Host Controller (rev 06)
  00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset
High Definition Audio (rev 06)
  ...

with dmesg saying:

  HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
  HDA Intel 0000:00:1b.0: irq 52 for MSI/MSI-X
  HDA Intel 0000:00:1b.0: setting latency timer to 64
  hda_codec: ALC889: BIOS auto-probing.
  HDMI status: Pin=6 Presence_Detect=0 ELD_Valid=0
  input: HDA Intel HDMI/DP as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input2
  input: HDA Intel Headphone as
/devices/pci0000:00/0000:00:1b.0/sound/card0/input3
  ALSA device list:
    #0: HDA Intel at 0xfb9f4000 irq 52

and I'm not seeing anything odd with the bad kernel, but the long-on
"boing" sound repeats about once a second as an echo and some
corruption for a few seconds, and trying to listen to music or
anything else is just psychedelic (more echo/stutter effects).

                      Linus
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