This might not be a bug, but a few kernel revisions ago, DVI-0 became active:
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 8192 x 8192
DVI-0 unknown connection (normal left inverted right x axis y axis)
LVDS connected 1440x900+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
VGA-0 disconnected (normal left inverted right x axis y axis)
Hardware: Lenovo Thinkpad T400
01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3400 Series
What's this DVI-0? LVDS and VGA-0 (when connected) work fine, and DVI-0 does not hurt, but still I thought I'd report this here in case this shouldn't be as it is now ;-)
It's on a docking station. As to why it's suddenly getting detected, can you bisect?
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