External display will be `Single Display` when HDMI plugged

[Andy Chi]

Upstream bug:
https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/1038

[Impact]

 * DUT will remain `Single Display` mode when 4k monitor is plugged.
   Not every 4K monitor will cause this issue.

[Test Plan]

 * Find a 4k monitor (Philips 276E)

 * Plug HDMI cable to internal HDMI port on DUT

[Where problems could occur]

 * This change makes DUT more stable when connecting external monitor.

 * This fix is also include in impish and jammy

[Andy Chi (andch)]

Upload debdiff for focal

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "gnome-control-center_3.36.5-0ubuntu4.debdiff" seems to be a debdiff. The ubuntu-sponsors team has been subscribed to the bug report so that they can review and hopefully sponsor the debdiff. If the attachment isn't a patch, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issue please contact him.]

[Sebastien Bacher (seb128)]

uploaded to focal

[Łukasz Zemczak (sil2100)]

Since I don't know the code, but I see that the logic is a bit modified, a quick question before we get this accepted: can you tell me if the detection behavior will be changed in any way to other users? Or will it all follow the same logic, just 'do it better'? Thanks!

[Andy Chi (andch)]

Include this patch won't change the detection behavior, it will 'do it better' to set a preferred scale when monitor plugged.

[Łukasz Zemczak (sil2100)]

Hello Andy, or anyone else affected,

Accepted gnome-control-center into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/gnome-control-center/1:3.36.5-0ubuntu4 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Andy Chi (andch)]

Enable -proposed and install gnome-control-center 1:3.36.5-0ubuntu4 on Focal. Test it on DUT which have HDMI port, plug HDMI monitor (ASUS PA279). External monitor with `Join Displays` works as expected.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gnome-control-center - 1:3.36.5-0ubuntu4

---------------
gnome-control-center (1:3.36.5-0ubuntu4) focal; urgency=medium

  * d/p/0001-display-Try-harder-to-select-a-good-and-working-scal.patch
    display: Try harder to select a good and working scale (LP: #1969428)

 -- Andy Chi <email address hidden> Tue, 19 Apr 2022 21:36:59 +0200

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for gnome-control-center has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.