yesterday I realized that direct rendering (dri) is not working anymore on
my xserver (checked as usual with
glxinfo | grep -i direct).
the solution was:
Section "Device"
Identifier "Intel Corporation 82865G Integrated Graphics Controller"
Driver "intel"
...
Option "Cachelines" "3582"
EndSection
& the most interesting part: all this fuzzing around for dri or the
modlines is
not the xserver's fault, not the monitor's fault, not the graphic card's
fault — but it's necessary because there's a KVM-switch between the
monitor & the machine. if I plug the monitor directly into the machine's
vga-port I don't even need an xorg.conf.
