ubuntu u13.10 figuring out sound. In past and present linux, fc13 and u13.10 I found I could not have a 2nd user access the sound and sometimes the first user could not.
In fc13 I got it so my 2nd user could access sound by my primary account could not. Trouble shooting seemed to find nothing that explained.
My partial fix hack for fc13 was
watson@xen1[101]cat reboot_fixes
#!/bin/tcsh
# /root/reboot_fixes
chmod 777 /dev/snd
cd /dev/snd
chmod 666 ./controlC1
chmod 666 ./hwC1D0
chmod 666 ./pcmC1D3p
chmod 666 ./by-path
chmod 777 ./by-path
chmod 666 ./controlC0
chmod 666 ./hwC0D2
chmod 666 ./pcmC0D0c
chmod 666 ./pcmC0D0p
chmod 666 ./pcmC0D2c
chmod 666 ./seq
chmod 666 ./timer
As I continued troubleshooting in u13.10 I realized that on every reboot. the permissions were being reset by the booting process. pulseaudio seems to be the deamon handling the interface.
watson@xen1[100]ls -l /dev/snd
total 0
drwxr-xr-x 2 root root 80 Apr 13 10:02 by-path/
crw-rw----+ 1 root audio 116, 6 Apr 13 10:02 controlC0
crw-rw----+ 1 root audio 116, 9 Apr 13 10:02 controlC1
crw-rw----+ 1 root audio 116, 5 Apr 13 10:02 hwC0D2
crw-rw----+ 1 root audio 116, 8 Apr 13 10:02 hwC1D0
crw-rw----+ 1 root audio 116, 4 Apr 13 10:02 pcmC0D0c
crw-rw----+ 1 root audio 116, 3 Apr 13 10:02 pcmC0D0p
crw-rw----+ 1 root audio 116, 2 Apr 13 10:02 pcmC0D2c
crw-rw----+ 1 root audio 116, 7 Apr 13 10:02 pcmC1D3p
crw-rw----+ 1 root audio 116, 1 Apr 13 10:02 seq
crw-rw----+ 1 root audio 116, 33 Apr 13 10:02 timer
I have also found that after reboot fixes, whenever a user starts a sound app. mostly vlc used. The last access time of
crw-rw----+ 1 root audio 116, 4 Apr 13 10:02 pcmC0D0c
crw-rw----+ 1 root audio 116, 3 Apr 13 10:02 pcmC0D0p
crw-rw----+ 1 root audio 116, 2 Apr 13 10:02 pcmC0D2c
crw-rw----+ 1 root audio 116, 7 Apr 13 10:02 pcmC1D3p
changes.
On u13.10 after reboot_fixes both users can use sound, but only one at a time.
still analyzing. |
