GUI elements break in various (Qt?) applications after a while on 15.10

[Zoltan Kiss]

After booting, everything works fine for a while. But after a while, the GUI of various apps stop working and start being misaligned and badly rendered. See attached screenshots.

Affected applications:
- Krusader
- smplayer
- Skype

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: krusader 1:2.4.0~beta3-2ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Oct 28 10:10:46 2015
ExecutablePath: /usr/bin/krusader
InstallationDate: Installed on 2015-09-26 (32 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: krusader
UpgradeStatus: Upgraded to wily on 2015-10-24 (4 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[DEDan (zsdedan)]

I confirm.

[Zoltan Kiss (zoltan-kiss-jr)]

I believe this is a bug in ubuntu and not in Krusader, smplayer or Skype. Did some research online and issuing sudo killall -9 unity-settings-daemon seems to have an effect on things - although it does not solve the glitches.

[DEDan (zsdedan)]

I think too that is bug of ubuntu, because I found another complaint with this issue http://askubuntu.com/questions/691636/update-to-15-10-breaks-qt-apps

[Zoltan Kiss (zoltan-kiss-jr)]

An other thread I found seems to be the same issue: http://askubuntu.com/questions/689682/kubuntu-upgrade-broke-kde-programs

[Tomas Mrozek (u-mail-j)]

I have the same problem with KeePassX and ownCloud sync client in Ubuntu 14.04 (with non-default kernel 4.0.7-040007-generic).

[Zoltan Kiss (zoltan-kiss-jr)]

Reported this to Qt as well: https://bugreports.qt.io/browse/QTBUG-49215

Their response was that they have stopped supporting 4.x versions. Not sure if krusader, smplayer and skype are using 4.x qt but 'apt-cache showpkg krusader' seems to list 4.x qt libs.

Could this mean this is a kernel 4.x issue?

[Zoltan Kiss (zoltan-kiss-jr)]

Changing affected package to the kernel as it seems to be related to that based on affected users' feedback

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.3 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/v4.3-unstable/

[Michael Foley (foli)]

Issues with qbzr and mumble as well, but works with workaround mentioned here:
http://askubuntu.com/questions/693136/upgraded-to-ubuntu-15-10-wily-and-get-qnativeimage-unable-to-attach-shared-memo
https://bbs.archlinux.org/viewtopic.php?id=200167

So from terminal:
QT_GRAPHICSSYSTEM=native mumble

qbzr and mumble do seem to use qt4 from dependency package list.

Note, this is with a fresh install of 15.10 just after release, not an upgrade.

[Tomas Mrozek (u-mail-j)]

This is not related to kernel. I've tried version 4.3 (http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-wily/) in Ubuntu 14.04 and the problem remains. It really looks like it has something to do with other programs based on Java. As soon as I close PhpStorm, the problem disappears in other programs.

[Zoltan Kiss (zoltan-kiss-jr)]

I'm using intellij all day, which is also a java app. Today I'm testing if the workaround QT_GRAPHICSSYSTEM=native solves the issue or not

[Luigi Clemente Awin (luigi-clemente)]

I confirm that I have this issue with KeepassX. Closing Phpstorm actually fixes it.

[Zoltan Kiss (zoltan-kiss-jr)]

QT_GRAPHICSSYSTEM=native seems to have fixed it for me

[DEDan (zsdedan)]

QT_GRAPHICSSYSTEM=native fixes for me too

[vvhk (vvhk-deactivatedaccount-deactivatedaccount)]

QT_GRAPHICSSYSTEM=native fixed keepassx for me as well (bug #1513429).