I can no longer reproduce this bug after the upgrade to xserver-xorg-video-nouveau 1:1.0.11-1; I'll try to do some more tests. -- Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)