I believe this is a duplicate of bug #475259 and am marking it as such.
What is slim? There doesn't appear to be a package of that name in Ubuntu. Does slim start an X server? If so, why does slim work but gdm fails (resulting in trying to load the vesa X server, which will trash the KMS console)?
Can you provide a copy of /var/log/Xorg.0.log from a successful start after gdm has been downgraded?
I believe this is a duplicate of bug #475259 and am marking it as such.
What is slim? There doesn't appear to be a package of that name in Ubuntu. Does slim start an X server? If so, why does slim work but gdm fails (resulting in trying to load the vesa X server, which will trash the KMS console)?
Can you provide a copy of /var/log/Xorg.0.log from a successful start after gdm has been downgraded?