I can confirm a similar behavior as described in post #7. 1. I installed Ubuntu Studio 15.04 on the harddisk and there was no way to get sound from speakers. 2. I started Ubuntu Studio 12.04.5 from a USB stick with persistence and did all updates. 3. With 12.04.5 initial system and also after update I had sound on speakers. 4. I boot 15.04, with power connected, and there is sound on speakers. 5. I boot 15.04 using the battery, and there is NO sound on speakers. 6. I boot 15.04, with power connected, and there is NN sound on speakers.
7. I go back and can repeat cycle starting at item 3. I also verified, that when just temporarily removing power cable before step 4, I still have sound in step 4. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1265611 Title: No sound with HDA Intel, VIA VT8237A/VT8251, kernel 3.12 To manage notifications about this bug go to: https://bugs.launchpad.net/alsa-driver/+bug/1265611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
