Comment 52 for bug 1332900

if it support surround 5.1 by three audio jacks

the easy way is to use hdajackretask to change them to line out

although this patch allow desktop to use 5.1 speakers as 2.1

but pulseaudio alway use your internal 2.1 speakers when select 2.1 profile

http://git.alsa-project.org/?p=alsa-lib.git;a=commit;h=48f1b308cc66152eb6db66742dd0d08d888cda8d