Running Blender while the mesa-dri-drivers-experimental package is installed results in Blender not functioning properly. Blender displays its splash screen but does not advance to the user interface, instead the interface will flash in and out of existence when the mouse is moved about the window, and buttons in the interface may stay if the mouse is held over them. Removing the experimental set of mesa drivers corrects this problem, leaving me to believe the issue is caused by the mesa-dri-drivers-experimental package.
Created attachment 427860 [details] glxinfo on a machine that suffers this bug.
That appears to be a glxinfo from after you've removed -experimental, so I can't tell what video card this is with. What video hardware are you using?
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