Ok, I solved the problem in my case. Given it seemed to be a communication problem I go the idea it could be ownership of sockets. I found various folders in my home directory were not owned by my local user and/or were not readable. Root owned .dbus and .gvfs, below .local were files/folders owned by me but without read/write permission.
I did a "chmod u+rw -R ~.local" and "sudo chown -R [myuser]:[myusergroup] /home/[myuser]" and a reboot and so far no problems since a few hours. Maybe it would be a good idea to check for that once in a while. There may be valid reasons of not-user-owned folders or files, but probably a warning message would help. Also I believe everything below .local should be read-writeable for the user and owned by it. Please correct me if I am wrong. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1181666 Title: gnome-shell randomly blocks mouse clicks from working in app windows To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1181666/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
