Locking the screen in a dualhead configuration results in one monitor being still visible

[Unkraut]

Binary package hint: gdm

Hi!

Locking the screen on system with two monitors results in only one getting black while the other keeps on displaying its old content.

Steps to reproduce: Click on System->Lock screen. Firstly both screens turn black, but then one turns to its previous content.

Best regards

---------Additional information:----------

Swithing to dualhead:

$ xrandr --newmode 1600x1200 235.00 1600 1728 1896 2192 1200 1203 1207 1262 -hsync +vsync
$ xrandr --addmode VGA-0 1600x1200
$ xrandr --output VGA-0 --mode 1600x1200 --left-of LVDS

Version of gdm:

$ apt-cache policy gdm
 Installiert: 2.27.4-0ubuntu11
  Kandidat: 2.27.4-0ubuntu11
  Versions-Tabelle:
 *** 2.27.4-0ubuntu11 0
        500 http://ubuntu.inode.at karmic/main Packages
        100 /var/lib/dpkg/status

[Sebastien Bacher (seb128)]

the screen locking is a gnome-screensaver thing

[Unkraut (unkraut2)]

Hi,

this bug has disappeared after installing recent upgrades. Can't recall which one it was, however.

Best regards!