Bug#611452: xserver-xorg-core: switching to linux console leaves screen blank

[Andreas Beckmann]

Hi Carsten,

> Carsten Allefeld <carsten.allefeld at googlemail.com> (29/01/2011):
>>
>> After being logged in to my KDE session under X, switching to a
>> virtual linux console using Ctrl-Alt-F1 leads to a blank screen. The
>> console seems to be working, insofar as I can log in blindly and
>> start a command, which I can verify is running after switching back
>> to the X session using Ctrl-Alt-F7.  Because of this, I suspect that
>> the problem is that either the video mode is not set correctly, or
>> the font is not loaded. However, I did no special screen mode / font
>> configurations before or after upgrading to lenny, so this can't be

Did you mean squeeze instead of lenny? At least this information
suggests that you use squeeze:

>-- System Information:
>Debian Release: 6.0
>  APT prefers testing
>  APT policy: (500, 'testing')

>> the problem. I am not entirely sure whether the problem lies with
>> this package or another one, but I can't come up with a way to find
>> out what exactly is going wrong. If you can point me to a way to
>> pinpoint the problem, I would be glad to do so.

Some things to try:

1. Try to reproduce the problem with a free driver, e.g. nv or nouveau
instead the the non-free nvidia driver. In /etc/X11/xorg.conf change the
        Driver "nvidia"
line to "nv" or "nouveau" and reboot (or stop X, rmmod nvidia, start X,
but a reboot is probably better to create a clean (and reproducible)
environment).
Or just move xorg.conf away and reboot, X autoconfiguration is advanced
enough to not need a xorg.conf for a default setup with free drivers.
Ensure the nvidia kernel module is not loaded (will be autoloaded if
listed in /etc/modules)
   lsmod | grep nvidia
should list nothing (test this after X has been started).

2. If the problem seems to be related to nvidia, please try the driver
currently in experimental, it may have been fixed by upstream inbetween.

3. Also test a minimal xorg.conf for the nvidia driver as described in
/usr/share/doc/nvidia-glx/README.Debian - eventually some of the options
in your xorg.conf (which seems to originate from some time ago) are
problematic nowadays.


Thanks

Andreas