Description:

When upgrading to new xorg-server 1.6.1 the X server with Xinerama (and Nvidia TwinView) crashes with signal 11 when pressing backspace after moving the mouse over multiple screens.


I have 4 monitors (2x2 twin-views) on 2 nvidia cards so I enabled twinview and Xinerama. The setup was working well before (I think 1.5.3).


Removing xinerama support in the configuration effectively fix the problem in 1.6.1 :

- Option "Xinerama" "On"
+# Option "Xinerama" "On"


I tried to use the old xorg kbd/mouse drivers instead of the new automatic hal/evdev driver also. Same issue.


Problem also described here :

debian-bugs-dist@lists.debian.org/msg638234.html"> http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg638234.html

Fixed in xorg-server>1.6.1 ?

debian-bugs-dist@lists.debian.org/msg638300.html"> http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg638300.html


My xorg.conf :

Section "ServerLayout"
Identifier "Standard"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
Option "Xinerama" "On"
EndSection

Section "ServerFlags"
Option "blank time" "10"
Option "standby time" "20"
Option "suspend time" "30"
Option "off time" "60"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc:unscaled"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/75dpi"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/100dpi"
FontPath "/usr/share/fonts/PEX"
FontPath "/usr/share/fonts/cyrillic"
FontPath "/usr/share/fonts/Type1"
FontPath "/usr/share/fonts/ttf/western"
FontPath "/usr/share/fonts/ttf/decoratives"
FontPath "/usr/share/fonts/truetype"
FontPath "/usr/share/fonts/truetype/openoffice"
FontPath "/usr/share/fonts/truetype/ttf-bitstream-vera"
FontPath "/usr/share/fonts/latex-ttf-fonts"
FontPath "/usr/share/fonts/defoma/CID"
FontPath "/usr/share/fonts/defoma/TrueType"
EndSection

Section "Module"
EndSection

Section "Monitor"
Identifier "Monitor0"
Option "DPMS" "true"
EndSection

Section "Monitor"
Identifier "Monitor1"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "Card0"
Driver "nvidia"
VendorName "nVidia Corporation"
BoardName "All"
BusID "PCI:2:0:0"
Option "DPMS" "true"
Option "NoLogo" "true"
Option "UseDisplayDevice" "DFP-0, DFP-1"
Option "RenderAccel" "True"
Option "TwinView" "True"
Option "MetaModes" "DFP-0: 1280x1024, DFP-1: 1280x1024"
EndSection

Section "Device"
Identifier "Card1"
Driver "nvidia"
VendorName "nVidia Corporation"
BoardName "All"
BusID "PCI:7:0:0"
Option "DPMS" "true"
Option "NoLogo" "true"
Option "UseDisplayDevice" "CRT-0, CRT-1"
Option "RenderAccel" "True"
Option "TwinView" "True"
Option "MetaModes" "CRT-0: 1280x1024, CRT-1: 1280x1024"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection


Steps to reproduce:

* Install xorg-server-1.6.1
* Enable Xinerama across multiple screens (and TwinView ?)
* Move move around
* Press backspace for a long time => crash the server with the following log :


Backtrace:
0: /usr/bin/X(xorg_backtrace+0x26) [0x4efd76]
1: /usr/bin/X(xf86SigHandler+0x39) [0x49be99]
2: /lib/libc.so.6 [0x7fa595d81150]
3: /usr/bin/X(miPointerWarpCursor+0x8b) [0x4d9e4b]
4: /usr/bin/X [0x477da0]
5: /usr/bin/X [0x4d9a9c]
6: /usr/bin/X [0x53468f]
7: /usr/bin/X [0x454f04]
8: /usr/bin/X(CheckMotion+0x2af) [0x45924f]
9: /usr/bin/X(ProcessOtherEvent+0x2d9) [0x53e249]
10: /usr/bin/X(XkbHandleActions+0x21b) [0x5653bb]
11: /usr/bin/X(XkbProcessKeyboardEvent+0x116) [0x565bf6]
12: /usr/bin/X [0x55ddb4]
13: /usr/bin/X [0x55de75]
14: /usr/bin/X [0x4ed5d8]
15: /usr/bin/X(WaitForSomething+0x56b) [0x4edc2b]
16: /usr/bin/X(Dispatch+0x80) [0x44d6c0]
17: /usr/bin/X(main+0x3bd) [0x43389d]
18: /lib/libc.so.6(__libc_start_main+0xe6) [0x7fa595d6d546]
19: /usr/bin/X [0x432d29]

Fatal server error:
Caught signal 11. Server aborting