[Ice Lake] screen goes blank for few seconds when there is new audio activity

[Hossein Lotfi]

I noticed this after installing 20.04.
At the beginning of new audio activity (playing video or generting system sounds eg. terminal bell) screen goes blank for few seconds.I can also reproduce it by opening settings in gnome and going to audio section.

The pulseadio in -vvv mode is attached around one of these events.
This might not be entirely a pulseadio issue, so appreciate a pointer on how to narrow it down to the source of the issue.

More info:

$ lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04
$ apt-cache policy pulseaudio
pulseaudio:
  Installed: 1:13.99.1-1ubuntu3
  Candidate: 1:13.99.1-1ubuntu3
  Version table:
 *** 1:13.99.1-1ubuntu3 500
        500 http://ca.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

-H
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: demystifier 4382 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-04-23 (7 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Package: pulseaudio 1:13.99.1-1ubuntu3
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Tags: focal
Uname: Linux 5.4.0-28-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 02/26/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.0.7
dmi.board.name: 077Y9N
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.0.7:bd02/26/2020:svnDellInc.:pnXPS139300:pvr:rvnDellInc.:rn077Y9N:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9300
dmi.product.sku: 096D
dmi.sys.vendor: Dell Inc.

[Hossein Lotfi (demystifier)]

pactl list output is attached

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1876228

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Hossein Lotfi (demystifier)]

apport information

[Hossein Lotfi (demystifier)]

apport information

[Hossein Lotfi (demystifier)]

apport information

[Hossein Lotfi (demystifier)]

apport information

[Hossein Lotfi (demystifier)]

apport information

[Hossein Lotfi (demystifier)]

apport information

[Daniel van Vugt (vanvugt)]

Seems there's a growing list of these bugs. Bug 1875254 is in progress but see also: https://bugs.launchpad.net/ubuntu/+bugs?field.tag=ice-lake-flicker

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1876228

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.

[Hossein Lotfi (demystifier)]

Thanks Daniel,
Yes my issue is a duplicate of Bug 1875254 and test kernel suggested in that bug fixed my issue

-H