Bug#688564: alsa: no sound from from internal speaker

[Jonathan Nieder <jrnieder@gmail.com>]

tags 688564 + upstream patch moreinfo
# hardware support
severity 688564 important
fixed 688564 linux-2.6/2.6.37-1~experimental.1
quit

Hi,

Bill Allombert wrote:

> there is no sound from the internal speaker, but the output jack plug works.
> On the other hand, the internal speaker works with linux-image-2.6.37-trunk-amd64
[...]
> Manufacturer:      Sony Corporation
> Product Name:      VPCS11C5E
> Product Version:   C10464HB
> Firmware Version:  R0280Q3
[...]
> Codec: Realtek ALC275

Thanks!  There have been several changes improving support for that
chip since 2.6.32.y, so it will probably take a few tries to pin this
one down.

Do you know how other kernels between 2.6.32 and 2.6.37 did?

Please test the attached patch, for example by using the following
instructions:

 0. prerequisites

	apt-get install git build-essential

 1. get the kernel history, if you don't already have it

	git clone \
	  git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

 2. fetch latest 2.6.32.y+drm.z

	cd linux
	git remote add squeeze-drm \
	  git://kernel.ubuntu.com/smb/linux-2.6.32.y-drm33.z.git
	git fetch squeeze-drm

 3. configure, build, test

	git checkout squeeze-drm/master
	cp /boot/config-$(uname -r) .config; # current configuration
	scripts/config --disable DEBUG_INFO
	make localmodconfig; # optional: minimize configuration
	fakeroot -u make deb-pkg; # optionally with -j<num> for parallel build
	dpkg -i ../<name of package>; # as root
	reboot
	... test test test ...

   Hoppefully it reproduces the bug.  So

 4. try the patch

	cd linux
	git am -3sc /path/to/the/patch
	fakeroot -u make deb-pkg; # maybe with -j4
	dpkg -i ../<name of package>; # as root
	reboot
	... test test test ...

I'd also be interested to hear whether the microphone jack works.

Thanks for your help and patience,
Jonathan