This is a further report on the behaviour of the sound system. I did not experence any crackling today so am unable to report on its occurrence.
I played a video using the Videos app and ontained good quality sound. Plugging a pair of good quality headphones allowed me to listen for any instances of poor quality. None were heard. I note that a pair o fheadphones appears to override any signal being sent to the Speakers (as one would normally expect for electrical switching of the output via the headphone socket) as noted in comment #12. However, I also note that the system retains separate volume controls for speakers and headphones. Thus, if the speakers are set to a louder volume than the headphones, highlighting the Speakers menu item in the Sound panel will increase the volume of the sound in the headphones. When I plugged an HDMI monitor into the DisplayPort socket, the video display system recognised the monitor and extended the display to it. I was thus able to move the Videos window into the monitor's area and get the window to appear in full screen as it does on the laptop's screen. However, the sound remained playing through the headphones. There was no HDMI/Display Port menu item in the Sound panel. Using the workaround as in the initial bug description, I opened the VLC app, selected the HDMI under Audio > Devices and, as soon as a video file was opened, the HDMI menu item appeared. I closed the VLC app and highlighted the HDMI menu item which caused the sound to play out of the minotor's speakers. Unplugging the monitor from the Display Port caused the display to revert to the laptop's display and the sound menu item caused the sound to be directedto revert to the headphones that remained plugged in. However, reconnecting the HDMI monitor brought up the HDMI sound output option in the Sound panel. Highlighting of the HDMI caused the sound to be redirected to the monitor's speakers once again. Just for good measure, I switched on a previously paired set of Bluetooth headph ones. Their menu item appeared in the Sound panel and the sound was able to be directed to them as one might expect. What I regard as part of this bug report is therefore the failure of the sound system to recognise the availability of the HDMI / Display Port sound option without having to kick it into action using the VLC app. Other outputs such as the headphone and Bluetooth headphones seem to achieve this but not the connection to the Display Port unless previously "primed" by VLC. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1402666 Title: [XPS13 9333, Intel Haswell HDMI, Digital Out, HDMI] Playback problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1402666/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
