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    SubjectRe: T61P sound issue
    At Tue, 5 Feb 2008 22:16:08 +0100 (CET),
    Jiri Kosina wrote:
    > [ added Takashi ]
    > On Tue, 5 Feb 2008, Felipe Balbi wrote:
    > > > > > > Could anyone make T61P's ICH8 sound controller to work properly?
    > > Good that there's a lot of people using T61p, it's a good machine.
    > > I'll upgrade my BIOS and try again the crappy sound.
    > I have just bought X61s, and it seems to have the very same soundcard as
    > your T61p does:
    > 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
    > Subsystem: Lenovo Lenovo Thinkpad T61
    > Flags: bus master, fast devsel, latency 0, IRQ 17
    > Memory at fe220000 (64-bit, non-prefetchable) [size=16K]
    > Capabilities: [50] Power Management version 2
    > Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
    > Capabilities: [70] Express Unknown type IRQ 0
    > Capabilities: [100] Virtual Channel
    > Capabilities: [130] Unknown (5)
    > The sound also doesn't work with 2.6.24 (tried modprobing the
    > snd-hda-intel with 'model=thinkpad', didn't make any difference). The
    > mixer settings seem to be correct, but there is no sound.
    > Two strange things in alsamixer:
    > - it is possible to change volume of the "PCM" toggle, but it is missing
    > the possibility to mute/unmute (the box with "MM"/"OO" simply isn't
    > there)
    > - the "Headphone" toggle has "OO" as it is unmuted, but there is no
    > possibility to change its volume, the volume box is completely missing

    These are intentional. There is no proper widgets (in HD-audio term,
    corresponding to registers) to behave for these purposes.
    On 2.6.25, you have additional "Master" volume and switch so that
    these won't matter much, I hope.

    > Takashi, if you need any other information which would help resolving
    > this, please let me know.

    First, make sure that you unmuted the hardware volume / mute via
    laptop keyboards.

    If everything looks OK ("PCM" adjusted, "Headphone" and "Speaker"
    unmuted) but still it doesn't work, it can be a driver problem.
    If you set CONFIG_SND_HDA_POWER_SAVE, try to undefine it.

    Or, try Ingo's patch Ted suggested. (To be noted, this couldn't get
    in to the mainline because this causes problems on other devices.
    2.6.24-git already inclues this patch but with some workarounds.)


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