I am facing flickering in KDE Plasma 5.4. Flickering stops when I change Compositor Rendering Back-end To OpenGL 3 and then change again to OpenGL 2.
- OS: KUbuntu 15.04
- Graphics: Intel HD 4000
I was having the same issue but with a different graphics card and a different OS (Fedora 22 KDE spin). I just came across this:
which has several options that seem to solve the problem under Fedora at least. I'm trying option 3 and it seems to be working so far, and the first two options are things that can be changed purely through the kde system settings app (shouldn't be specific to OS).
Hope this helps you!
EDIT: In an effort to make this answer better, I'm putting a summary of the link given above here. To solve there issue there are three options
Go into System Setting > Hardware > Display and Monitor > Compositor and change the tearing prevention to "Full screen repaints"
As an alternative, in the same menu change the compositor to XRender
If you'd prefer to not do either of the above, create a script file in
kwin.sh (or anything ending .sh really). In that file place the line
This is recommended if your
.xsession-errors file mentions that Triple Buffering is not available. To find this, I just opened the file in kwrite and searched for triple, sure enough it said not available. After making the file, that message is no longer present on subsequent reboots.
had also that flickering with KDE on Kubuntu 15.10 running on a i5-3320M with integrated HD4000. it was really annoing my when i played games like mincraft in fullscreen.
After i stopped the compositor, no Fullscreen flickering. I acutally set startup without the composer, that is my soulution.
All other methodes written above had no affect.
Maybe this is a thing KDE developers need to fix, cause i read a lot about this on the net an many people using ivy-bridge cpu´s have this flickering problem.
In case this helps anyone else searching for a similar issue: I had intermittent flickering in Kubuntu 15.10 on a Macbook Pro retina. The desktop would load without issue, however on around every other boot, at some point the display would start flickering when minimising/resizing windows. Option 1 'full screen repaints' fixed this for me.
I have the same problem with intel drivers on Debian .
It's a PSR bug.
So you must disable it.
In Debian I add in to
/etc/default/grub: GRUB_CMDLINE_LINUX=" i915.enable_psr=0".
sudo update-grub, to regenerate /boot/grub/grub.cfg.