On an intel laptop with mesa drivers. Only xrender shows the effects (blur around windows, transparency, animations, etc) With opengl, both 2.0 and 3.1, it doesn't, used to work before i tried to open wayland, it's broken in xorg now.
please attach your ~/.config/kwinrc
Created attachment 104848 [details] kwinrc
Please remove the line GLPlatformInterface=egl And try to switch to OpenGL again. Did you change compositor settings in the wayland session?
Removing that line fixed the issue, opengl now works on xorg, I don't know if I changed compositor settings: I tried now to go xorg -> wayland -> xorg without touching anything and the problem did not occur. Tried to change from opengl 3.1 to 2.0 on wayland and it crashed on me with a black screen, so I don't really know what happened By the way, I don't see an option to change egl related stuff on the panel (i'm not sure if there was such a thing in te past?) but I have not touched anything that wasn't on the gui. That line appeared on its own. Thanks for the support
Patch to no longer write the config value at https://phabricator.kde.org/D5285
Git commit a936516107579df13362f6d2d6f91f26a447d6dd by Martin Gräßlin. Committed on 04/04/2017 at 17:38. Pushed by graesslin into branch 'Plasma/5.9'. [kcmkwin/compositing] Do not write GLPlatformInterface config Summary: The gui element to select the platform interface is dropped. Thus we should not store the config for it. This is rather important as changing compositor settings on Wayland would result in egl being written into the config which potentially breaks an X11 session. Reviewers: #kwin, #plasma Subscribers: plasma-devel, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D5285 M +0 -4 kcmkwin/kwincompositing/compositing.cpp https://commits.kde.org/kwin/a936516107579df13362f6d2d6f91f26a447d6dd
*** Bug 378762 has been marked as a duplicate of this bug. ***