Public bug reported:

Binary package hint: gnome-screensaver

Most of the time when I lock my desktop (or when the screensaver kicks
in) I am able to log back into the desktop by moving the mouse or
pressing a key and then entering the password.

However sometimes, usually when the screen has been locked overnight or
for a couple of hours, I'm unable to log back in.  I move the mouse or
press a key and the mouse pointer appears but the password box doesn't
come up.

On half of the occasions that this happens I'm able to enter the
password and the screen unlocks, however on a couple of occasions I
press any key, enter my password etc and I just get a beep.  I have to
force the X session to close (using the good old Ctrl-Alt-Backspace) but
it's a bit frustrating if I leave anything running.

I'm not sure if it helps but I am running the Nvidia GLX New driver on a
Geforce 6200GS (PCI Express) with Xinerama enabled with two screens (one
monitor and a HDTV to the right hand side).

Here's my xorg.conf:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 1.0  ([EMAIL PROTECTED])  Tue Mar  4 20:28:57 UTC 
2008

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 1.0  ([EMAIL PROTECTED])  Thu Feb 14 18:13:41 PST 
2008
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
    Identifier     "Default Layout"
    Screen      0  "Screen0" 0 0
    Screen      1  "Screen1" 1280 0
    InputDevice    "Generic Keyboard" "CoreKeyboard"
    InputDevice    "Configured Mouse" "CorePointer"
EndSection

Section "Module"
    Load           "glx"
EndSection

Section "ServerFlags"

# Removed Option "Xinerama" "1"
# Removed Option "Xinerama" "0"
    Option         "Xinerama" "1"
EndSection

Section "InputDevice"
    Identifier     "Generic Keyboard"
    Driver         "kbd"
    Option         "XkbRules" "xorg"
    Option         "XkbModel" "pc105"
    Option         "XkbLayout" "gb"
EndSection

Section "InputDevice"
    Identifier     "Configured Mouse"
    Driver         "mouse"
EndSection

Section "Monitor"
    Identifier     "Configured Monitor"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Acer AL1714"
    HorizSync       30.0 - 82.0
    VertRefresh     50.0 - 75.0
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "PhilipsTV (5)"
    HorizSync       31.0 - 80.0
    VertRefresh     47.0 - 85.0
EndSection

Section "Device"
    Identifier     "Configured Video Device"
    Driver         "nvidia"
EndSection

Section "Device"
    Identifier     "Videocard0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 7300 SE/7200 GS"
    BusID          "PCI:1:0:0"
    Screen          0
EndSection

Section "Device"
    Identifier     "Videocard1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 7300 SE/7200 GS"
    BusID          "PCI:1:0:0"
    Screen          1
EndSection

Section "Screen"
    Identifier     "Default Screen"
    Device         "Configured Video Device"
    Monitor        "Configured Monitor"
    DefaultDepth    24
    Option         "NoLogo" "True"
    SubSection     "Display"
        Depth       24
        Modes      "nvidia-auto-select"
    EndSubSection
EndSection

Section "Screen"

# Removed Option "TwinView" "0"
# Removed Option "metamodes" "CRT: nvidia-auto-select +0+0"
# Removed Option "TwinView" "1"
# Removed Option "metamodes" "CRT: nvidia-auto-select +0+0, DFP: 
nvidia-auto-select +1280+0"
    Identifier     "Screen0"
    Device         "Videocard1"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "TwinViewXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "CRT: nvidia-auto-select +0+0"
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Videocard0"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "DFP: nvidia-auto-select +0+0"
EndSection

** Affects: gnome-screensaver (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Hardy when locking desktop, sometimes password box doesn't come up
https://bugs.launchpad.net/bugs/204800
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