Graphics glitches after wake up.

[bishb25]

Hi all,

I have an annoying glitch that happens after I wake my PC up from a long sleep (a few hours to overnight). The titles of my desktop icons are all glitched up looking like censor bars and the PC runs a bit poorly. I put the PC to sleep using Application Launcher>Leave>Suspend. I wake it up by pressing a key on the keyboard then I login as normal at the login screen, but I'm greeted with this after plasma loads.

The easiest way to fix it is to log out (Application Launcher>Leave>Logout) then login again.

I'm using Kubuntu 18.04

Kubuntu 5.3.0-40-generic #32~18.04.1-Ubuntu SMP Mon Feb 3 14:05:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

I'm running an MSI GTX1050ti 4GB OC edition
Nvidia Driver: 435.21


Anyone have any ideas how to fix this? My PC is an older optiplex workstation with an i7-2600 (4 core 3.4GHz) and linux for some reason takes more than 5 minutes to boot so I like suspending the system instead of shutting down so I can get back in quick if I need to.

Thanks

[kubicle]

This is probably an old Qt bug that is supposedly fixed in later versions, which version of Qt are you using?

As a temporary workaround, does running "plasmashell --replace" fix the corruptions (the command reloads the plasmashell, rather quicker than re-logging)?

Some of the bug reports with possible workarounds:
https://bugs.kde.org/show_bug.cgi?id=382115
https://bugs.kde.org/show_bug.cgi?id=370953
https://bugs.kde.org/show_bug.cgi?id=364766
https://devtalk.nvidia.com/default/t...p-folder-view/
https://bugreports.qt.io/browse/QTBUG-56610

One workaround mentioned is adding

[QtQuickRendererSettings]
GraphicsResetNotifications=true

in $HOME/.config/plasmashellrc

The bug should be fixed in 20.04, if you plan to upgrade to that eventually

[bishb25]

I don't know which version of QT i'm using. it would be whatever is in the official repos.

[kubicle]

I don't know which version of QT i'm using. it would be whatever is in the official repos.

Then it should be 5.9.5 (which is rather old) [https://packages.ubuntu.com/search?k...ll&section=all]

You can check your qt version by running "kf5-config --version" in konsole, the version is also shown in the "kinfocenter" app and in the "help>about application>libraries" section in kde apps.

I don't think there is a *simple* way to upgrade qt5 for bionic installations (if someone running kubuntu has some info on this, feel free to pitch in), but upgrading to focal (20.04 release should be in april) should give you a much newer version (currently 5.12.5).

Kde Neon (based on *buntu 18.04) has 5.14.1 (which is the latest released version), and that is one of the main reasons I use Neon (up-to-date Qt).

[Don B. Cilly]

~$ kf5-config --version
Qt: 5.14.1
KDE Frameworks: 5.68.0
kf5-config: 1.0

[EDIT] Oops. Started replying, did something else, got jumped :·)