Chris Coulson suggests this sounds very similar to a gnome-screensaver issue (bug #555870) he saw reported, where gnome-screensaver does not reliably reset the gamma back to the correct value after its faded.
To verify if this bug is the same as that bug, please collect an xtrace of gnome-screensaver while reproducing the behavior.
Chris Coulson suggests this sounds very similar to a gnome-screensaver issue (bug #555870) he saw reported, where gnome-screensaver does not reliably reset the gamma back to the correct value after its faded.
To verify if this bug is the same as that bug, please collect an xtrace of gnome-screensaver while reproducing the behavior.