I've downloaded and installed the Vista audio drivers (http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-67218) rebooted Vista and the sound worked again.
I then shutdown the PC and booted Ubuntu Feisty and e presto the sound in Ubuntu worked from the start. I am still unsure about what caused all the problems but for now it seems to work again. -- [Feisty] Inaudible audio upon resuming from suspend-to-disk https://bugs.launchpad.net/bugs/80893 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs