ubuntu-x-swat team mailing list archive

["Grizzly\(Francis Smit\)" <grizzly@xxxxxxxxxx>]

Martin Olsson wrote:
> @Francis, do you have accesss to two computers? 
No I only have the one computer but I'll ask work maybe they will loan 
me one of the portables
> 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"
Done
> * 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
>
>   
OK will endeavour to do this but it might take me a while to get access 
to another machine
> (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
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