Just another observation: switching back and forth between Speakers and Headphones sometimes puts the headphones into the Telephony Duplex mode. Even though the High Fidelity Playback seems to be selectable, the Test Sound button only results in the Mono test being offered. A workaround is to turn off the headphones in the Bluetooth drop-down panel and then turn them back on. The headphones then re- appear in the "Play sound through" list with the Settings for Headset showing High Fidelity Playback and the Test Sound button allowing testing of right and left hand channels. (If the Telephony Duplex mode is selected, the Test Sound button allows Mono testing as expected.)
This further suggests that the kernel is not necessarily recognising the full features of the Bluetooth headset every time that they are selected. (Whilst writing this, I am continuing to monitor the sound output of the Videos app. It appears to be stable without any interference from the Firefox Web Browser!) Also, the laptop has warmed up since the previous report when it was switched on from cold. Hopefully the hardware is not sensitive to temperature. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1402194 Title: PCI/internal sound card not detected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1402194/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
