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    SubjectRe: [GIT PULL] sound updates #2 for 2.6.40
    On Fri, May 27, 2011 at 5:02 PM, Linus Torvalds
    <torvalds@linux-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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