Public bug reported:
Binary package hint: gnome-screensaver
This bug may equally be an issue with the Nvidia GLX drivers or Xorg.
When my laptop is configured with the following excerpt from xorg.conf,
the gnome-screensaver unlock dialog does not appear. I haven't tested if
the dialog box appears if a second monitor/projector is connected.
Further symptoms include two screensavers seeming to run at the same
time, sometimes one screensaver briefly appears over the top of the
other.
# Begin xorg.conf
Section "Device"
Identifier "NVIDIA Corporation NVIDIA Default Card"
Driver "nvidia"
BusID "PCI:1:0:0"
Option "RenderAccel" "true"
Option "Coolbits" "1"
Option "ConnectedMonitor" "DFP,CRT"
Option "TwinView" "1"
Option "Metamodes" "1280x800,1280x800; 800x600,800x600;
1280x800,NULL"
Option "UseEdidFreqs" "true"
Option "SecondMonitorHorizSync" "30-96"
Option "SecondMonitorVertRefresh" "50-160"
Option "TwinViewOrientation" "Clone"
EndSection
# End xorg.conf
I have disabled the ConnectedMonitor Option and all below it as a
workaround while I do not have a second monitor connected.
** Affects: gnome-screensaver (Ubuntu)
Severity: Normal
Priority: (none set)
Status: Unconfirmed
--
Unlock screen is invisible with Nvidia twinview
https://launchpad.net/bugs/45018
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