I have this problem on my Dell Latitude E6500 with Intel Mobile 4 graphics using the i915 kernel driver.
Switching to gdm from lightdm just brought up the "low graphics mode" dialog.
I think this is more of an Xorg issue because of the X log message:
[drm] failed to set drm interface version.
Failed to become DRM master.
UnloadModule: "intel"
I have this problem on my Dell Latitude E6500 with Intel Mobile 4 graphics using the i915 kernel driver.
Switching to gdm from lightdm just brought up the "low graphics mode" dialog.
I think this is more of an Xorg issue because of the X log message:
[drm] failed to set drm interface version.
Failed to become DRM master.
UnloadModule: "intel"
These seem related:
bug #982889
bug #966868