Update with some new info. I booted into Win10 and noticed that it wasn't recognizing an audio device. Googled around a bit and ended up (re)installing the Realtek drivers largely by following what I read here:
http://en.community.dell.com/support-forums/laptop/f/3517/t/19630850 NOTE: I did the diagnostic and the 8 tones played correctly from the speakers. Rebooted into Win10 again. It was showing an audio device, but I couldn't get it to actually play anything. Rebooted into Ubuntu again, and it now sees the broadwell-rt286 device! With a little poking in sound preferences, I'm able to get the laptop speakers to work. Not quite out of the woods yet though. 1) If I reboot the computer into Ubuntu, the broadwell device disappears. I have to go into Win10 and then back into Ubuntu to get it to show up again. 2) If I plug speakers into the headphone jack, I can get sound to work, but if the sound card is left alone for any length of time is starts making a loud persistent clicking sound over and over. The speakers will play any audio just fine, but if I'm not doing anything, there's a continuous clicking noise. I'm attaching the output of a new run of also-info.sh, which definitely has a bunch of new things in it compared to the attachment in my previous comment. ** Attachment added: "alsa-info-new.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1551880/+attachment/4660983/+files/alsa-info-new.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1551880 Title: [Dell XPS 13 9343] Audio broken with I2S mode in Ubuntu 16.04 kernel 4.4 (but works with kernel 4.3) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1551880/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
