I have the same problem with Acer Aspire 1524WMLI. 00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 50)
Built in speakers are deaf after resume, but sound works great if I plug headphones. No sound problems with hibernation. -- sound gone after resuming from sleep on hp nx8220 https://launchpad.net/bugs/21574 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs