ubuntu-x-swat team mailing list archive

[TJ <ubuntu@xxxxxxxxxxx>]

I think this theory has some legs. I had noticed some apparently random
characters showing up on VT7 after stopping gdm manually during
debugging.

I've now restarted the PC several times, not touched the keyboard until
the gdm log-in screen appears. Select the user with the mouse and then
begin typing the password. After 3 characters xserver crashes and
restarts.

Use another tty to "sudo stop gdm" then Ctrl+Alt+F7. Once VT7 text
console is revealed it shows a few kernel log messages from the drm
driver (see bug #342122 "[i815] [drm:drm_release] *ERROR*
reclaim_buffers_locked() deadlock") but, more importantly, there's some
*quasi-random* characters appearing and, in most cases, they are the
same across reboots - suggesting they are generated.

They look to be partial control-code representations.

E.g: " ^X ^C
or: ^]^]^]^]^]^]^]^]^]^]88888888888888888888888888 8888888888;

The latter happens if, as soon as the log-in dialog appears, I switch
away to VT1 (Ctrl+Alt+F1), log-in, then "sudo stop gdm" and then
Ctrl+Alt+F7.

If I stop the gdm process from a remote ssh session these characters
don't show up.

-- 
Xorg crashed at first login attempt
https://bugs.launchpad.net/bugs/532047
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