hello all,

>>>and in which file do i  specify my default desktop
manager?

The default desktop can be changed in
etc/sysconfig/desktop file

>>>and more importantly, i cant get resolutions above
640x480.
>>>i tried editing the XF86Config file and the
resolutions are
>>>in the order "1024x786" "800x600" "640x480"


The first thing to be noted is that XFree86 ver 4 uses
XF86Config-4 file 
instead of XF86Config. The XF86Config-4 has got some
new additions,,, like
"Driver" line inside every section, so ur graphics
card has to give the
correct driver there. but that is not guranteed to
give a resolution over
640x480. for example my card is cirrus logic 5430.. it
has got a driver
cirrus but it does not give me resolution over
640x480. as u all know there are
a number of X servers available. For the older
machines the new XFree86 server does not seem that
lovable.. 

Here after i'll tell u what i did. maybe its correct
maybe its not,, but it works for me.

Instead of XFree86 try running XF86_SVGA from command
line.. before running
u have set XF86Config file with correct parameters.
(XF86_SVGA uses XF86Config)
In the Screen section for the color svga server, the
driver should be "svga"
then set the desired resolution. If u r gettin
resolution over 640 then its
workin fine. (NOTE: There wont be any display
managers, the screen will be 
in graphics mode with only a mouse cursor). 

Now to set it to the display managers...
open /etc/X11/xdm/Xservers,  there should be an entry
like this in the 
bottom part:- :0 local /usr/X11R6/bin/X,  change the
"X" part to XF86_SVGA.

Now for gdm session open /usr/X11/gdm/gdm.conf, in the
bottom servers section,
u should be finding an entry:-  0=/usr/bin/X11/X.
change "X" to XF86_SVGA.

This should do it, now gdm, xdm and kdm should work
fine. startx will still be using XFree86 so it would
be giving 640 resoltion. may be u can change it and 
tell me. 

for errors and logs check:
/var/log/messages, xdm-errors, XFree86.0.log
$HOME/.xsession-errors
/var/gdm/:0.log   ( display 0 errors )


Note: What i've done here may not be the correct way
to do it, if
anybody knows the correct way, please tell me. 
(The configuration files directories maybe different
for
different distributions)

This is my system configuration: P166 MMX, 32mb EDO
ram, cirrus logic 543x 
card with 1mb vram, samtron SC428PT/PTL monitor, ALS
100 sound card,
PCQ Linux 7.1 




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