Bug#420292: xserver-xorg-video-intel: gnome-screensaver blanks screen and does not display dialog after upgrade to 2.0.0-1

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Arjan Oosting wrote:
> With i810 1.7.4:
>
> arjan@nebula:~$ xrandr -q --verbose
> Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
> default connected 1024x768+0+0 normal (normal left inverted right) 0mm x 0mm
>         Identifier: 0x56
>         Timestamp:  349578648
>         Subpixel:   horizontal rgb
>         Clones:     
>         CRTC:       0
>         CRTCs:      0
>   1024x768 (0x57)   47.2MHz
>         h: width  1024 start    0 end    0 total 1024 skew    0 clock   46.1KHz
>         v: height  768 start    0 end    0 total  768           clock   60.0Hz
>   

Ok, that's a single screen.

> With intel 2.0.0:
>
> arjan@nebula:~$ xrandr -q --verbose
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1280 x 1280
> VGA connected 1024x768+0+0 normal (normal left inverted right) 0mm x 0mm
> [...]
> LVDS connected 1024x768+0+0 normal (normal left inverted right) 304mm x 228mm
>
> So it does think something is attached.
>   

Yes, it exposes 2 screens. This monitor detection problem is apparently
known upstream. To workaround it, could you try disabling the LVDS
output with
    xrandr --output VGA --off
(not sure it will work but we never know...) and see whether
gnome-screensaver works fine then?

I am pretty sure there's also a bug in gnome-screensaver. It was working
fine on my laptop today. However, I just plugged a external VGA monitor
and got gnome-screensaver to display a black screen as you described.

Brice