Hum, the bug seems already fixed with the latest updates of Intrepid. I dunno which update fixed the problem 'cause I've not tried to lock the screen since the report above, but it works well right now, without any configuration change.
I attach the lspci -vvnn if useful for anyone, but not the Xorg's log since I cannot reproduce the problem anymore. Regards ** Attachment added: "lspci -vvnn" http://launchpadlibrarian.net/19389316/gp%2Blspci-vvnn ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: Incomplete => Fix Released -- [8.10] Locking screen with an ATI Radeon Xpress 200M (RS400) results in a blank screen https://bugs.launchpad.net/bugs/289949 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