Mint 17 KDE Screen flickering issues with discrete GPU

  • Vivaldi seems a wonderful, feature rich browser - just what the doctor ordered! However, - a curious issue with 1.0 on Linux mint 17-KDE, running nvidia-prime - everything works fine when using the nvidia GPU, but as soon as I switch to the intel GPU, I get a very annoying flickering. I have narrowed the problem down to the two GPUs, but I'm not altogether sure how to fix it. Surely a browser should run well on a fairly up to date discrete GPU? Curious!

  • Moderator

    May be a problem with OpenGL and hardware acceleration or VSnyc.
    Intel GPU is slower and may be cause flickering while redraw of OpenGL or video buffer.

  • I wondered that too - In fact it's a very v-sync like flicker. The curious thing is that the same system runs chromium perfectly. Experimentation in vivaldi://flags/ doesn't seem to have much of an effect.

  • Solved it! May be useful should anyone else stumble across this thread.
    No amount of tinkering with GPU-related settings in vivaldi://flags has helped. However thinking of vsync (thanks Gwen-Dragon!) I ran it from the command line with the flag:-
    Obviously I then changed the launcher…
    Sorted. It may be worth pointing out that in KDE the "relaunch" button in vivaldi://flags was proving troublesome - not cleaning up processes after itself, so this slowed the troubleshooting a bit (it proved more reliable to shut then restart the program manually).

    Hope this is of use to someone, and thanks Gwen-Dragon!

  • Moderator

    Ah VSync. Good to know.

    That is indeed a fine and useful tip for us.
    Thanks a lot. 🙂

  • Experiencing the same problem. Disabling GPU vsync fixes the flickering, but it also puts way more strain on my CPU whenever I watch a video of any kind. I just updated from Linux Mint 17.3 to 18 a few days ago, and that's when this problem started (I was using vivaldi on the old installation as well). Any idea what could be causing this? maybe mint 18 has a different version of some graphics driver?

    EDIT: I already mentioned this in another thread about this problem, but now I tried it for a few minutes and switching to native window really does fix the problem. In conclusion, it is probably a combination of some driver and the way the vivaldi window works.

  • Moderator

    For boards with Intel GPU this helped as Xorg config:

    Section "Device"
       Identifier  "Intel Graphics"
       Driver      "intel"
       Option      "AccelMethod" "sna"
       Option      "DRI" "3"
       Option      "TearFree" "true"


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