I'm having the same problem in Ubuntu 14.04.1 LTS using on-board Intel graphics, no binary drivers in sight.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/1001842 Title: No Audio from HDMI After Switching Monitor Off / On Status in fglrx-installer package in Ubuntu: Confirmed Bug description: After the 12.04 Update my HDMI audio stops working anytime I turn off or on, my 2nd monitor(plasma TV) System Settings>Sound - Output HDMI audio disappears from the list when monitor is turned off or on and does not reappear. see http://askubuntu.com/questions/133575/hdmi-audio-stops-after-tv- turned-off/139265#139265 I'm guessing it has something to do with sink detection and ATI video The only info I've found is after running pactl list Partial copy Sink #0 State: SUSPENDED Name: alsa_output.pci-0000_01_00.1.hdmi-stereo Description: Turks HDMI Audio [Radeon HD 6000 Series] Digital Stereo (HDMI) Driver: module-alsa-card.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 4 Mute: no Volume: 0: 100% 1: 100% 0: 0.00 dB 1: 0.00 dB balance 0.00 Base Volume: 100% 0.00 dB Monitor Source: alsa_output.pci-0000_01_00.1.hdmi-stereo.monitor Latency: 0 usec, configured 0 usec Flags: HARDWARE DECIBEL_VOLUME LATENCY SET_FORMATS Properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" alsa.name = "HDMI 0" alsa.id = "HDMI 0" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "3" alsa.card = "1" alsa.card_name = "HD-Audio Generic" alsa.long_card_name = "HD-Audio Generic at 0xfddfc000 irq 48" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:01:00.1" sysfs.path = "/devices/pci0000:00/0000:00:02.0/0000:01:00.1/sound/card1" device.bus = "pci" device.vendor.id = "1002" device.vendor.name = "Advanced Micro Devices [AMD] nee ATI" device.product.name = "Turks HDMI Audio [Radeon HD 6000 Series]" device.string = "hdmi:1" device.buffering.buffer_size = "65536" device.buffering.fragment_size = "32768" device.access_mode = "mmap+timer" device.profile.name = "hdmi-stereo" device.profile.description = "Digital Stereo (HDMI)" device.description = "Turks HDMI Audio [Radeon HD 6000 Series] Digital Stereo (HDMI)" alsa.mixer_name = "ATI R6xx HDMI" alsa.components = "HDA:1002aa01,00aa0100,00100200" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" Ports: hdmi-output-0: HDMI / DisplayPort (priority: 5900, not available) Active Port: hdmi-output-0 Formats: pcm I checked before and after. The only difference is hdmi-output-0: HDMI / DisplayPort (priority: 5900, not available) Where "not available" is the only change I found. Removing cable from HDMI socket and plugging in again, restores audio. Logging in and out again restores audio. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1001842/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
