After my Ubuntu updating (14.04 to 14.10), an Ubuntu none modified (on Unity), after doing a classical update with graphical update, et installation came fine, and restart much times after making all sudo apt-get update/grade/autoremove needed, without update happen anymore.
Material : Amilo Pi 2530 – Fujitsu
Update did by Ethernet, without network shutdown
Previous version: 14.04 (without problem), actual version: 14.10.
1/ One main error message: Sorry, an error occurred within software installation. Package: syslinux-themes-debian.
2/ No more Sound Card showed:
3/ Material:
********:~$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
4/ I tried this tutorial: here without success. AlsaMixer works fine for entry, detect material, but doesnt send outpout.
5/ PavuControl doesn't detect my material.
6/ I tried to uninstall and reinstall all, force services restart, restart computer, but nothing happen on my sound.
Best Answer
I have the same audio device, and noticed an unknown modem drive in the "Additional Drivers" tab of the "Software & Updates" setting.
I tried disabling the unknown driver and sound instantly worked. However upon restart the driver was re-enabled.
For a more permanent fix I removed the package "sl-modem-daemon" and after a restart the audio was working again.
After a restart the driver is disabled and sound is working again.
Hope that helps.