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Bug#601727: alsa-base: No sound through speakers on newer kernels

Hi José and Stas,

Jose Manuel Castroagudin wrote:

> If the system boots using a 2.6.30 kernel, everything works perfectly. But,
> using a newer kernel (right now, 2.6.32-5-686), some strange things happen: It
> seems like there is no sound at all. Every mixer shows all the controllers, and
> everything seems right, but you can hear no sound through the laptop builtin
> speakers. But I can hear everything if I plug some headphones in (i mean,
> through the headphones, not the speakers).
> options snd-hda-intel model=fujitsu-pi2515

stas zytkiewicz wrote:

> The fix is to add the two following lines to /etc/modprobe.d/alsabase.conf
> options snd-hda-intel model=hp-dv5

Some quick ideas for moving forward:

 1. Please attach output from the alsa-info.sh script[1].
 2. Is this reproducible with a current sid or experimental kernel?  (The
    only packages from outside squeeze you should need in order to check
    are the kernel image itself, linux-base, and initramfs-tools.)
 3. If a 3.x.y kernel avoids problems, it would be helpful to bisect through
    kernels between squeeze and sid from snapshot.debian.org to find when the
    fix was introduced.  If a current sid or experimental kernel
    does _not_ avoid problems, it would be useful to file a report at
    http://alsa-project.org/ (if doing so, please let us know the
    message-id or bug number so we can track it).

Thanks and hope that helps,

[1] http://git.alsa-project.org/?p=alsa-driver.git;a=blob_plain;f=utils/alsa-info.sh

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