Lock screen does not blank everything on dualhead

[Marcus Sundman]

If you have a non-rectangular multi-monitor layout then the virtual screen is rectangular, but only the parts visible on monitors are blanked when you choose Lock Screen.

Steps to reproduce:
- Make a non-rectangular multi-monitor layout. (E.g., I have a 1280x1024 TFT and a 1600x1200 CRT using the MetaMode "CRT-0: 1600x1200 @1600x1200 +1280+0, DFP-0: 1280x1024 @1280x1024 +0+0")
- Move a window so that it's (partially) outside the monitor viewports yet inside the whole virtual screen.
- Lock the screen.
- Connect to the computer using vnc or similar.
- Now, without having to unlock the screen you can still see everything that's "outside" the normally visible parts. (E.g., in my case this is everything that's in the bottom left 1280x176 area of the screen.)

[Jamie Strandboge (jdstrand)]

Thank you reporting this issue and helping to make Ubuntu even better. Is this still a problem on Gutsy?

[Marcus Sundman (sundman)]

Yes, it still behaves the same way in gutsy.
(Also, in gutsy the video window (probably xv) is shown on top of the locked screen after closing and re-opening the lid of my laptop running compiz, but that isn't dualhead-related and should probably go into another bugreport.)

[Bryce Harrington (bryce)]

Seems to be working properly as of Ubuntu Precise, at least on Intel graphics.

Feel free to reopen with further details if it's not working for you.