Comment 22 for bug 428619

Looking at the differences between svolume_sse.c from pulseaudio 0.9.16 and the current one I noticed that those changes are only cosmetical - only a comment has changed. It does not make sense to try to patch that... But you can of course try the patch I posted in #19 and see if that works for you.

It is quite simple really. Assuming you...

- keep your sources in /usr/src
- downloaded the patch to your home directory
- have not built pulseaudio before so there are no pulseaudio*.deb or libpulse*.deb packages in /usr/src

...it goes something like this:

(first get the build dependencies:)

   sudo apt-get build-dep pulseaudio

(now get the source:)

   cd /usr/src
   apt-get source pulseaudio

(patch the source:)
(cd whatever directory the source was installed to, currently pulseaudio-0.9.18 so...)

   cd pulseaudio-0.9.18
   patch -p1 < ~/revert_svolume_mmx_to_known_good_version.patch

(build the binary packages:)

   fakeroot dpkg-buildpackage -b

(install pulseaudio and libpulse:)
(while still in the pulseaudio source directory, directly after the build has finished:)

   sudo dpkg -i ../libpulse0_*.deb ../pulseaudio_*.deb

As to how to test the new build depends on how you use it. If you run a sound-generating package like mplayer or totem it should be sufficient to kill any running pulseaudio daemon with:

   pulseaudio -k

It should autostart the next time you start any sound-generating program... unless you have autospawn=no in your personal pulseaudio config of course... in that case you need to start it manually.

If you run some sound-generating daemon like mpd you may need to restart that to make sure it starts a fresh copy of pulseaudio.

Now try to change volume...