Bug#546609: xserver-xorg: Blank screen if switching from vt7 to vt1 and back to vt7, after kdm login

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Boris shtrasman wrote:
> Package: xserver-xorg
> Version: 1:7.4+4
> Severity: critical
> Justification: breaks the whole system
>
> Happen starting from 7.4 (i tested it with 7.3 where it didn't happen).
> Happens only after login to kdm / gdm :
> Tested before login works as a charm.
> after kde login if i switch to any non graphical vt (1-6) and then back
> to vt7 i got blank screen.
> sysrq+k/b dosn't work (no affect).
> alt+ctrl+del also dosn't work
>
> nothing that i can do except manually shutdown down the pc (power button).
>   

Can you ping the machine from another machine ? If so, can you log in
through ssh and attach a gdb to see what the server is doing?

Brice