That was my hypothesis. I know little about the internals of ALSA.] It has lately started happening less often for me, but I haven't made a concerted attempt recently to see if it still repros on my machine.
I apparently haven't posted repro instructions yet, so here they are (only works on laptops) 1. Boot and log in. 2. Put machine into sleep mode. 3. Wake the machine. 4. As it's waking (and the screen comes on), put it to sleep while it is loading. This means closing the lid in the case for laptops. 5. Wake the machine again. 6. Sound now stops working through speakers. 7. Put the machine to sleep. 8. Wake it again, and unlock it if necessary. 9. Sound now works through speakers. Note: this works about 30-50% of the time, but it is rare for it to take more than 3-5 tries to trigger it. The typical case I've found is 2. I also have libtiff4 installed, but I don't have the easiest access to a clean install. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1320020 Title: [Inspiron 1470, Realtek ALC272, Speaker, Internal] No sound at all Status in “alsa-driver” package in Ubuntu: Confirmed Bug description: I can get perfect sound through headphones, and the kernel recognizes the internal speaker, but nothing is ever played through it. I have personally tested a pair of earbuds to make sure that sound could play through the headphone port, and that isn't a problem. The sound driver just refuses to recognize the existence of the speaker, even though the kernel does. I wouldn't be surprised if the last upstream update had something to do with it. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: isiah 7361 F.... pulseaudio CurrentDesktop: GNOME Date: Thu May 15 18:07:52 2014 InstallationDate: Installed on 2014-01-29 (106 days ago) InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed Symptom_Card: Built-in Audio - HDA Intel Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: isiah 7361 F.... pulseaudio Symptom_Jack: Speaker, Internal Symptom_Type: No sound at all Title: [Inspiron 1470, Realtek ALC272, Speaker, Internal] No sound at all UpgradeStatus: Upgraded to trusty on 2014-05-04 (11 days ago) dmi.bios.date: 03/23/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 0M7CYJ dmi.board.vendor: Dell Inc. dmi.board.version: A05 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A05 dmi.modalias: dmi:bvnDellInc.:bvrA05:bd03/23/2011:svnDellInc.:pnInspiron1470:pvrA05123:rvnDellInc.:rn0M7CYJ:rvrA05:cvnDellInc.:ct8:cvrA05: dmi.product.name: Inspiron 1470 dmi.product.version: A05123 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1320020/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
