Comment 1 for bug 45290

Thank you for your bug report.

Hmm. This sounds like a kernel bug (a user program like xscreensaver shouldn't be able to lock up the keyboard and stop caps lock working).

Marcin:

Does running a screensaver like /usr/lib/xscreensaver/glmatrix also cause a lockup? Could you also attach (using the Add Attachment link at the left of the launchpad website) your
/etc/X11/xorg.conf
file?