@Francis, do you have accesss to two computers? If so it would be very useful if you captured a stacktrace from X when it's in that black buggy state.
Please login to the buggy machine using SSH, then trigger the bug (just switch virtual terminals as you described above). Once the screen is black, do these things: * (with the machine still hung) please save the output of the command "dmesg" and also the files "/var/log/Xorg.0.log" and "/var/log/Xorg.0.log.old" (I know you already attach one copy of xorg.log earlier but I'm hoping that there might be some errors printed into xorg.log when it hangs so that's why I'd like to collect this log while the machine is still in that buggy "black screen" state). * install debug packages by running the command "sudo apt-get install xserver-xorg-core-dbg xserver-xorg-video-intel-dbg libgl1-mesa-dri-dbg libgl1-mesa-glx-dbg" * start the gdb debugger using this command "sudo gdb -p $(pidof X)" * activate logging to a file on disk inside the gdb debugger by running "set logging file gdb_blackscreen.txt" followed by the command "set logging on". * then, record a full backtrace by running the command "backtrace full" and pressing ENTER until all of it is printed. When you've returned to the "(gdb)" prompt just type "quit". * hopefully you can now use the command "sudo reboot now" to reboot the machine without having to use the powerbutton * attach the files to this bug report (PS. There is another way of collecting X backtraces describe here: https://wiki.ubuntu.com/X/Backtracing#Backtrace%20with%20gdb ) -- [915g] can't return to X after VT-switching (intel 82915G/GV/910GL) https://bugs.launchpad.net/bugs/374310 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
