Backport to bionic a patch for improved fractional scaling

Bug #1823857 reported by Mitar on 2019-04-09
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gnome-control-center (Ubuntu)

Bug Description

* Impact
In some cases after a configuration chang ethe "apply" button is not displayed

* Test case
On a multimonitor setup, go to settings -> display and change the monitors layout and zoom factor, following a change a "apply" button should be displayed

* Regression potential
The change is in the monitor configurations logic, just make sure that changing resolution/layouts work correctly and is restored are a logout/login cycle


I have been debugging why I do not get "Apply" button in Displays view when my primary monitor is on the left of the external monitor, but it appears when it is on the right. I traced the problem down to this issue and patch:

Reading this issue tracker I see that some issues people are reporting my be connected to this problem. I would suggest, if possible, that this patch is backported to Bionic and its version of gnome-control-center.

Mitar (mitar) wrote :

I made this patch for myself and it solved the problem.

The attachment "scaling-displays.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

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

tags: added: patch
Sebastien Bacher (seb128) wrote :

The issue is fixed in newer serie but indeed sounds worth backporting to BIonic

Changed in gnome-control-center (Ubuntu):
status: New → Fix Released
importance: Undecided → Low
description: updated

Hello Mitar, or anyone else affected,

Accepted gnome-control-center into bionic-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See 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 and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. 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 . 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.

Changed in gnome-control-center (Ubuntu Bionic):
status: New → Fix Committed
tags: added: verification-needed verification-needed-bionic
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