No thanks to Ubuntu support (or lack thereof), a fellow owner of a Dell 3000 / Intel-865G provided me the solution:
Create / edit / save this file ('vi', notepad, et al): /usr/share/X11/xorg.conf.d/00-xorg.conf that contains the following content: Section "Screen" Identifier "Default Screen" DefaultDepth 24 EndSection -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1173649 Title: incorrect color depth - intel graphics card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1173649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs