I updated today to 1831 kernel but the problem is the same, however the mentioned two tricks are working again: > On one machine at least, a workaround was to Ctrl-Alt-F1 then > back to Ctrl-Alt-F7. > > I've the same problem with my ATI Radeon Card and SyncMaster 191T monitor. > I've found changing the video mode (CTRL+ALT+"numpad +" or > CTRL+ALT+"numpad -") reset the video. Balint