I found out what it was: I had without my attention managed to press FN+F7.
This locks the mousepad. -- random desktop hangs while using mouse https://bugs.launchpad.net/bugs/114365 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs