Greg Madden wrote:
I have the same issue, and I have never used the "screen lock" option in the start menu.
Mine is caused bythe Nvidia driver, from vendor, for my Quadro card, does not play well with TDE.
You don't mention video card info or drivers, could help.
ps, my solution was to rename the executable responsible: /opt/trinity/bin/kdesktop_lock to kdesktop_lock.bk
I think this is a problem with kdesktop_lock in general, perhaps also related with different themes. The best would be to file a bug https://bugs.trinitydesktop.org, so that we do not forget. there are few bugs against kdesktop_lock already
regards