Started with dpkg -reconfigure -phigh xserver-xorg to get a clean xorg.conf... Then added:
Originally Posted by bridgman
UseFBDev true - came from the dpkg -reconfigure, so I left it...
Identifier "Configured Video Device"
Option "NoAccel" "true"
Option "UseFBDev" "true"
The result... OMG... I have native resolution again... I can't believe I didn't think about trying that, but I'll be the first to admit I've been stabbing in the dark...
So what next, the issue is now totally reproducible - NoAccell fixes it... I'd like to get a fully functional card back.
Thanks to everyone who has chimed in here!