GUI of Intellij IDEA is grayed out
Answered
When starting IDEA community or ultimate only the first few windows are visible and clickable (e.g. start a new project window). Once started a new project the bigger IDE window opens but is just a bigger grey area not indicating any GUI elements. I do not have KDE or GNOME installed and wish to only install the really necessary packages to use the IDE. Currently im on Gentoo, Kernel 4.9.76 and use X server.
What could be responsible for this behaviour and how to resolve it?
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https://youtrack.jetbrains.com/issue/IDEA-110048 may be related.
Do other Java Swing apps work on your system? You can try JEdit and NetBeans.
JEdit does seem to draw the whole GUI. Netbeans has the same problem as previously described. What could be the reason for that? Is it possible that it is caused by problems with the nouveau driver or an installed jdk/jre?
Could be related to the video driver, window manager or JDK.
Thank you so much for your suggestion to look at the window manager. Apparently there is java application missbehaving using dwm window manager because java doesn't know which wm is being used. Following https://wiki.gentoo.org/wiki/Dwm#Troubleshooting fixed my problem.