After Waking Up from Suspend to RAM the "close button" icon (graphic) of the window and the border of the window is broken on 4k display

Bug #1672206 reported by Franz W
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
unity (Ubuntu)
In Progress
Undecided
Unassigned

Bug Description

After Waking Up from Suspend to RAM the "close button" icon (graphic) of the window and the border of the window is broken on 4k display. If I restart unity (ALT+F2 -> unity) then everything is fine.
So this is why I think this is a unity bug.

Description: Ubuntu 16.04.2 LTS
Release: 16.04
unity 7.4.0+16.04.20160906-0ubuntu1

I just installed Ubuntu 16.04.2 LTE (date March 11,2017) and upgraded all packages. Then I see the bug.

I tried other desktops on other installations on the same PC and I can't see the bug. I can reproduce it only with unity.

I have a nVidia Geforce 1050 Ti with the proprietary driver 375.39 (up to date) from the graphics-drivers ppa from launchpad.
I think this is not a driver issue. The same driver works with KDE or even Linux Mint with Cinnamon. There is no graphic bug with other desktops.

more information:
I have different behaviors on the 4k display with different scaling factors in unity.
- If I have the scaling factor 1 then only the close button graphic is broken.
- If I have the scaling factor 1.25 then the close button and the border of the window is broken. There is a terrible big white border around the window. If I move the window the white big border is moved with the window. If I close the window and reopen it shows always this big white border.
- If I have the scaling factor 1.5 then the close button graphic is ok but the border is broken but not as terrible as with scaling factor 1.25

The only workaround I found is to restart unity or use another desktop.

Related branches

Revision history for this message
Kai-Heng Feng (kaihengfeng) wrote :

Hi, can you try the ppa in https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1292830/comments/90?

$ sudo add-apt-repository ppa:kaihengfeng/lp1292830
$ sudo apt update && sudo apt dist-upgrade

Then reboot and try.

If that works, please mark this one as duplicate.

Revision history for this message
Franz W (franzw) wrote :

Hi,

it works! Thank you.

When will it be integrated in an official version? 16.04.3 ?

Thank you!

Revision history for this message
Franz W (franzw) wrote :

ok. The window border and the close button work!

The "workspace switch window" (Ctrl + Alt + Right/Left) shows the same bug.

Revision history for this message
Kai-Heng Feng (kaihengfeng) wrote :

Courtesy to Saviq, he points out that the workspace preview widget is Compiz's Display Wall plugin.

Andrea Azzarone (azzar1)
Changed in unity (Ubuntu):
status: New → In Progress
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