Confirmed this bug with Ubuntu 12.04.2 LTS. Audio becomes unavailable after HDMI television has been turned off.
dmesg entries: [149806.475564] HDMI hot plug event: Codec=0 Pin=3 Presence_Detect=0 ELD_Valid=0 [149806.475609] HDMI status: Codec=0 Pin=3 Presence_Detect=0 ELD_Valid=0 Running the following to take down the display and throw it back up will get everything working again: xrandr -display :0 --output DFP2 --off xrandr -display :0 --output DFP2 --auto Replace FDP2 with your appropriate output device. There's probably a more graceful way to reset the sound but that's beyond my Linux-fu. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/1001842 Title: No Audio from HDMI After Switching Monitor Off / On To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1001842/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
