I came across an interesting bug in Windows 7 RC this week, where a laptop running Win7 was being used for a live software demo. The laptop had been connected to a data projector in extended desktop mode, and worked fine. However, the laptop was then disconnected, moved to another location, and connected to a new projector.
At the new location, the vision switcher in line would acknowledge that the source was connected and syncing at the correct resolution, but could only see a black/blank screen. In Windows 7′s display settings dialog box, if you pressed ‘Identify Displays’, the system would show “1″ and “2″ number overlays next to each other on the laptop’s local monitor.
It seemed that Windows 7 had confused itself, and thought that both outputs were in fact showing on the one monitor. Confused? So was I. A restart resolved the issue, and I haven’t had time to try replicating it again. Hopefully these bugs will be ironed out before RTM.
Windows 7 Identify Displays Bug
#1 by Ted on June 7, 2009 - 10:10 am
I thought that the “1|2″ was shown when the screen was cloned, hence it would be perfectly normal for it show up in this scenario.
The fact that it was just black on the external connector does sound like a bug though.
Cheers!
#2 by Steve Wylie on June 7, 2009 - 1:46 pm
Interesting – the 1 | 2 indication could indeed be for ‘clone’ mode… but yes the black output was puzzling… could have been something to do with the HP laptop that it was running on with integrated Intel graphics…