Thanks for reporting this bug and any supporting documentation. Since this bug has enough information provided for a developer to begin work, I'm going to mark it as confirmed and let them handle it from here. Thanks for taking the time to make Ubuntu better!
** Description changed: Here is the scenario that in most cases reveals the issue on my desktop, but not in 100% cases. I login (my login is a member of admin group if this matters), do something. Then I switch user and login under some regular user account. Use the desktop for a while. The do logoff. The screen goes black as during a regular logoff but it never shows login prompt. Neither Ctrl+Alt+Backspace, nor Ctrl+Alt+Del work here. The only way out is to reset the machine. Linux Bee 2.6.24-18-generic #1 SMP Wed May 28 20:27:26 UTC 2008 i686 GNU/Linux + + xorg.0.log with driver fglrx: + http://launchpadlibrarian.net/17021415/Xorg.0.log + + With autodetection enabled and driver "RADEON" used, I can get to the + login-screen but receive a black screen after logging in. + + xorg.0.log with driver radeon, autodetected: + http://launchpadlibrarian.net/17030342/Xorg.0.log Excerpt from lspci: 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV530LE [Radeon X1600/X1650 PRO] [1002:71c6] (prog-if 00 [VGA controller]) - Excerpt from dmesg: [ 47.585077] [fglrx] Reserve Block - 0 offset = 0X7ffb000 length = 0X5000 [ 47.585084] [fglrx] Reserve Block - 1 offset = 0X0 length = 0X1000000 [ 47.585089] [fglrx] Reserve Block - 2 offset = 0Xffff000 length = 0X1000 [ 47.585093] [fglrx] Reserve Block - 3 offset = 0Xffbf000 length = 0X40000 [ 47.650702] [fglrx] interrupt source 20008000 successfully enabled [ 47.650708] [fglrx] enable ID = 0x00000008 [ 47.650719] [fglrx] Receive enable interrupt message with irqEnableMask: 20008000 [ 47.650799] [fglrx] interrupt source 10000000 successfully enabled [ 47.650804] [fglrx] enable ID = 0x00000009 [ 47.650810] [fglrx] Receive enable interrupt message with irqEnableMask: 10000000 ** Changed in: xserver-xorg-video-ati (Ubuntu) Sourcepackagename: xorg => xserver-xorg-video-ati Status: Incomplete => Confirmed -- [fglrx] Black screen on Logoff, System completely inresponsible https://bugs.launchpad.net/bugs/241176 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