[tlug] how do I rotate monitor image?

[Michal Hajek <hajek1@example.com>]

Hello people :)

I have Eizo FlexScan L568 monitor [1] which is capable of rotating the
screen to be a portrait or landscape. 

So far I did not use this feature, but now I would like to give it a
try. Unfortunately I have no idea, how to accomplish this task. I have tried to
changed my /etc/X11/XF86Config-4 file such that:

Section "Screen"
Identifier "Default Screen"
Device     "Generic Video Card"
Monitor    "Generic Monitor"
DefaultDepth     24

#               SubSection "Display"
#               Depth     24
#               Modes    "1280x1024" 
#       EndSubSection

SubSection "Display"
  Depth     24
  Modes "1024x1280" 
                                                                                EndSubSection
EndSection

My idea being just to switch resolution X<->Y. 
But this apparently does not work. Actualy, I see no effect at all
(to my surprise).

My graphics card is Inno3D with Nvidia GeForce FX 5500 chip with 256MB
of memory. 
My system is debian testing, amd64 port. 
The relevant package seems to be:
xserver-common 6.8.2.dfsg.1-7

If this is of any use, than I believe I run xserver with the following
parametrs (from /usr/X11R6/lib/X11/xinit/xserverrc):
/usr/bin/X11/X -dpi 100 -nolisten tcp


[1] http://www.eizo.com/products/lcd/l568/index.asp

Can anyone please help me with this? :)

Best regards
Michal