Slow Audio Playback through DisplayPort monitor

[Brian Chidester]

I have a Dell XPS 13 (9343) hooked up to a Dell U2515H Monitor running 16.04 (clean install around beta) and connected to the monitor via 3.5mm stereo out I have a pair of Logitech speakers. When I hotplug the monitor to my laptop and try to play audio through "HDMI" the audio plays at what seems to be half speed.

The source of the audio does not matter (local audio/video, internet audio/video stream etc) but if the laptop is rebooted with the monitor connected, the problem does not manifest. Playing audio through the internet laptop speakers with any setup seems to work fine, as does playing audio through the laptop headphone jack.

[Brian Chidester (brianchidester)]

Not sure why this is marked as affecting dpkg, that may have been a mistake on my part when filing. This is an audio bug.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1584929

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.6 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[Hasan Mahmood (hasan-mahm)]

I am also seeing this with my Samsung monitor.

[penalvch (penalvch)]

Hasan Mahmood, it will help immensely if you filed a new report with the Ubuntu via a terminal:
ubuntu-bug audio

Please feel free to subscribe me to it.

For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]