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System: Ubuntu 10.04.1

GFX Card1: 04:02.0 VGA compatible controller: nVidia Corporation NV44A [GeForce 6200] (rev a1)
GFX Card2: 01:00.0 VGA compatible controller: ATI Technologies Inc RV610 video device [Radeon HD 2400 PRO]
Xorg Config: Below
Using: xmonad instead of Gnome (but problem existed in Gnome as well, before I switched)

Screen Layouts (all at 1200x1024)

Nvidia | Nvidia | ATI

Description of problem:
I can't at-will reproduce this bug, but it seems to happen 0-5 times daily.  What happens is I'm working away either typing into a terminal, or checking my changes in the browser.  Every now-and-again, the cursor regardless of where it was on the screen jumps to a monitor border, and locks.  When I say locks, I mean doesn't respond to me moving the mouse.  It also is rapidly blinking.  Anything on the screen that otherwise would have been updating, flash video, console cursor blinks, seconds ticking on a clock all stop.  However, music continues to play.  Control-Alt-F1 doesn't do anything either, keyboard isn't responding.  However, the machine is still fine.  The solution is I ssh in, and restart GDM (I assume it kills X as well), and then I just log back in.

Each card, when used by itself in my computer has run for 3 days without
this happening.  I've never been able to go that long with both being
used at the same time, not to say that either isn't the culprit but it's
not looking that way.


---- Xorg.conf ------

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    Screen      1  "Screen1" RightOf "Screen0"
    Screen      2  "Screen2" RightOf "Screen1"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "1"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "DELL E198FP"
    HorizSync       31.0 - 80.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "DELL 1907FP"
    HorizSync       30.0 - 81.0
    VertRefresh     56.0 - 76.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor2"
    VendorName     "Unknown"
    ModelName      "DELL 1907FP"
    HorizSync       30.0 - 81.0
    VertRefresh     56.0 - 76.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6200"
    BusID          "PCI:4:2:0"
    Screen          0
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6200"
    BusID          "PCI:4:2:0"
    Screen          1
EndSection

Section "Device"
    Identifier     "Device2"
    Driver         "radeon"
    VendorName     "ATI Technologies Inc"
    BoardName      "RV610 video device [Radeon HD 2400 PRO]"
    BusID          "PCI:1:0:0"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "TwinViewXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "CRT: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "DFP: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen2"
    Device         "Device2"
    Monitor        "Monitor2"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

-- End Xorg.conf

** Affects: xorg-server (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Xorg crash cursor locked on monitor border
https://bugs.edge.launchpad.net/bugs/623605
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