Thank you Samuel, that did solve my problem. After commenting out the line in the file accessibility.properties as you described, freemind starts without any problems.
Regards, Vincent Smeets 2015-11-20 14:08 GMT+01:00 Samuel Thibault <sthiba...@debian.org>: > Hello, > > Please have a look at > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797595 > > Commenting the line in /etc/java-8-openjdk/accessibility.properties may > help with X11 issues, but I believe the ground issue is that the openjdk > awt toolkit doesn't tell X11 that it is using threads, and thus all > kinds of race conditions can happen within libxcb etc. just because > freemind happens to be using threads. > > Samuel >