Thanks for reporting this bug in Ubuntu. You're right that this ought to be falling back to the vesa driver. Can you do two things?
First, please attach your /etc/X11/xorg.conf, /var/log/Xorg.0.log, and the output of lspci -vvnn.
Second, experiment with moving your /etc/X11/xorg.conf to /etc/X11/xorg.conf-orig and running X with no xorg.conf. This will tell us if in this case, Xorg itself can detect things properly.
Thanks for reporting this bug in Ubuntu. You're right that this ought to be falling back to the vesa driver. Can you do two things?
First, please attach your /etc/X11/xorg.conf, /var/log/ Xorg.0. log, and the output of lspci -vvnn.
Second, experiment with moving your /etc/X11/xorg.conf to /etc/X11/ xorg.conf- orig and running X with no xorg.conf. This will tell us if in this case, Xorg itself can detect things properly.