Hi,

I have exactly the same error. Instantly after I plug in my USB receiver for wireless keyboard graphical environment crashes. It started to occur immediately after release upgrade to 12.04. Before that there were no problems (I've been using this keyboard for couple of years without issues). 
Upgrade process was smooth, software is up-to-date, in BIOS I have enabled USB legacy support.
Below you can find my Xorg.0.log.

[   765.703] 
X.Org X Server 1.11.3
Release Date: 2011-12-16
[   765.703] X Protocol Version 11, Revision 0
[   765.703] Build Operating System: Linux 2.6.42-23-generic i686 Ubuntu
[   765.703] Current Operating System: Linux xerxes 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:52 UTC 2012 i686
[   765.703] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=1bd81dbe-08cd-4a3f-b761-f3c313a12dbf ro quiet splash vt.handoff=7
[   765.704] Build Date: 20 April 2012  05:12:21AM
[   765.704] xorg-server 2:1.11.4-0ubuntu10.1 (For technical support please see http://www.ubuntu.com/support) 
[   765.704] Current version of pixman: 0.24.4
[   765.704] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[   765.704] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[   765.705] (==) Log file: "/var/log/Xorg.0.log", Time: Tue May  8 20:03:37 2012
[   765.706] (==) Using config file: "/etc/X11/xorg.conf"
[   765.706] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[   765.710] (==) No Layout section.  Using the first Screen section.
[   765.710] (**) |-->Screen "Default Screen" (0)
[   765.710] (**) |   |-->Monitor "<default monitor>"
[   765.711] (==) No device specified for screen "Default Screen".
	Using the first device section listed.
[   765.711] (**) |   |-->Device "Default Device"
[   765.711] (==) No monitor specified for screen "Default Screen".
	Using a default monitor configuration.
[   765.712] (==) Automatically adding devices
[   765.712] (==) Automatically enabling devices
[   765.712] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[   765.712] 	Entry deleted from font path.
[   765.713] (==) FontPath set to:
	/usr/share/fonts/X11/misc,
	/usr/share/fonts/X11/100dpi/:unscaled,
	/usr/share/fonts/X11/75dpi/:unscaled,
	/usr/share/fonts/X11/Type1,
	/usr/share/fonts/X11/100dpi,
	/usr/share/fonts/X11/75dpi,
	/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType,
	built-ins
[   765.713] (==) ModulePath set to "/usr/lib/i386-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[   765.713] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[   765.713] (II) Loader magic: 0xbaa5a0
[   765.713] (II) Module ABI versions:
[   765.713] 	X.Org ANSI C Emulation: 0.4
[   765.713] 	X.Org Video Driver: 11.0
[   765.713] 	X.Org XInput driver : 16.0
[   765.713] 	X.Org Server Extension : 6.0
[   765.716] (--) PCI:*(0:2:0:0) 10de:087d:1043:83f9 rev 177, Mem @ 0xfa000000/16777216, 0xe0000000/268435456, 0xf6000000/33554432, I/O @ 0x0000dc00/128, BIOS @ 0x????????/131072
[   765.717] (II) Open ACPI successful (/var/run/acpid.socket)
[   765.718] (II) "extmod" will be loaded by default.
[   765.718] (II) "dbe" will be loaded by default.
[   765.718] (II) "glx" will be loaded. This was enabled by default and also specified in the config file.
[   765.718] (II) "record" will be loaded by default.
[   765.718] (II) "dri" will be loaded by default.
[   765.718] (II) "dri2" will be loaded by default.
[   765.718] (II) LoadModule: "glx"
[   765.719] (II) Loading /usr/lib/i386-linux-gnu/xorg/extra-modules/libglx.so
[   765.780] (II) Module glx: vendor="NVIDIA Corporation"
[   765.780] 	compiled for 4.0.2, module version = 1.0.0
[   765.780] 	Module class: X.Org Server Extension
[   765.780] (II) NVIDIA GLX Module  295.40  Thu Apr  5 21:49:54 PDT 2012
[   765.780] (II) Loading extension GLX
[   765.780] (II) LoadModule: "extmod"
[   765.782] (II) Loading /usr/lib/xorg/modules/extensions/libextmod.so
[   765.782] (II) Module extmod: vendor="X.Org Foundation"
[   765.783] 	compiled for 1.11.3, module version = 1.0.0
[   765.783] 	Module class: X.Org Server Extension
[   765.783] 	ABI class: X.Org Server Extension, version 6.0
[   765.783] (II) Loading extension MIT-SCREEN-SAVER
[   765.783] (II) Loading extension XFree86-VidModeExtension
[   765.783] (II) Loading extension XFree86-DGA
[   765.783] (II) Loading extension DPMS
[   765.783] (II) Loading extension XVideo
[   765.783] (II) Loading extension XVideo-MotionCompensation
[   765.783] (II) Loading extension X-Resource
[   765.783] (II) LoadModule: "dbe"
[   765.785] (II) Loading /usr/lib/xorg/modules/extensions/libdbe.so
[   765.785] (II) Module dbe: vendor="X.Org Foundation"
[   765.785] 	compiled for 1.11.3, module version = 1.0.0
[   765.785] 	Module class: X.Org Server Extension
[   765.785] 	ABI class: X.Org Server Extension, version 6.0
[   765.785] (II) Loading extension DOUBLE-BUFFER
[   765.785] (II) LoadModule: "record"
[   765.787] (II) Loading /usr/lib/xorg/modules/extensions/librecord.so
[   765.787] (II) Module record: vendor="X.Org Foundation"
[   765.787] 	compiled for 1.11.3, module version = 1.13.0
[   765.787] 	Module class: X.Org Server Extension
[   765.787] 	ABI class: X.Org Server Extension, version 6.0
[   765.787] (II) Loading extension RECORD
[   765.787] (II) LoadModule: "dri"
[   765.789] (II) Loading /usr/lib/xorg/modules/extensions/libdri.so
[   765.790] (II) Module dri: vendor="X.Org Foundation"
[   765.790] 	compiled for 1.11.3, module version = 1.0.0
[   765.790] 	ABI class: X.Org Server Extension, version 6.0
[   765.790] (II) Loading extension XFree86-DRI
[   765.790] (II) LoadModule: "dri2"
[   765.792] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
[   765.792] (II) Module dri2: vendor="X.Org Foundation"
[   765.792] 	compiled for 1.11.3, module version = 1.2.0
[   765.792] 	ABI class: X.Org Server Extension, version 6.0
[   765.792] (II) Loading extension DRI2
[   765.792] (II) LoadModule: "nvidia"
[   765.792] (II) Loading /usr/lib/i386-linux-gnu/xorg/extra-modules/nvidia_drv.so
[   765.794] (II) Module nvidia: vendor="NVIDIA Corporation"
[   765.794] 	compiled for 4.0.2, module version = 1.0.0
[   765.794] 	Module class: X.Org Video Driver
[   765.794] (II) NVIDIA dlloader X Driver  295.40  Thu Apr  5 21:29:50 PDT 2012
[   765.794] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[   765.794] (++) using VT number 7

[   765.795] (II) Loading sub module "fb"
[   765.795] (II) LoadModule: "fb"
[   765.796] (II) Loading /usr/lib/xorg/modules/libfb.so
[   765.797] (II) Module fb: vendor="X.Org Foundation"
[   765.797] 	compiled for 1.11.3, module version = 1.0.0
[   765.797] 	ABI class: X.Org ANSI C Emulation, version 0.4
[   765.797] (II) Loading sub module "wfb"
[   765.797] (II) LoadModule: "wfb"
[   765.798] (II) Loading /usr/lib/xorg/modules/libwfb.so
[   765.799] (II) Module wfb: vendor="X.Org Foundation"
[   765.799] 	compiled for 1.11.3, module version = 1.0.0
[   765.799] 	ABI class: X.Org ANSI C Emulation, version 0.4
[   765.799] (II) Loading sub module "ramdac"
[   765.799] (II) LoadModule: "ramdac"
[   765.799] (II) Module "ramdac" already built-in
[   765.800] (II) Loading /usr/lib/i386-linux-gnu/xorg/extra-modules/nvidia_drv.so
[   765.800] (II) Loading /usr/lib/xorg/modules/libwfb.so
[   765.800] (II) Loading /usr/lib/xorg/modules/libfb.so
[   765.800] (II) NVIDIA(0): Creating default Display subsection in Screen section
	"Default Screen" for depth/fbbpp 24/32
[   765.800] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
[   765.800] (==) NVIDIA(0): RGB weight 888
[   765.800] (==) NVIDIA(0): Default visual is TrueColor
[   765.801] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[   765.801] (**) NVIDIA(0): Option "NoLogo" "True"
[   765.801] (**) NVIDIA(0): Enabling 2D acceleration
[   765.988] (II) NVIDIA(GPU-0): Display (ONK TX-NR609 (DFP-0)) does not support NVIDIA 3D
[   765.988] (II) NVIDIA(GPU-0):     Vision stereo.
[   765.994] (II) NVIDIA(0): NVIDIA GPU ION (C79) at PCI:2:0:0 (GPU-0)
[   765.994] (--) NVIDIA(0): Memory: 524288 kBytes
[   765.994] (--) NVIDIA(0): VideoBIOS: 62.79.67.00.00
[   765.994] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
[   765.997] (--) NVIDIA(0): Connected display device(s) on ION at PCI:2:0:0
[   765.997] (--) NVIDIA(0):     ONK TX-NR609 (DFP-0)
[   765.998] (--) NVIDIA(0): ONK TX-NR609 (DFP-0): 165.0 MHz maximum pixel clock
[   765.998] (--) NVIDIA(0): ONK TX-NR609 (DFP-0): Internal Single Link TMDS
[   766.000] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display
[   766.000] (**) NVIDIA(0):     device ONK TX-NR609 (DFP-0) (Using EDID frequencies has
[   766.001] (**) NVIDIA(0):     been enabled on all display devices.)
[   766.231] (II) NVIDIA(0): Assigned Display Device: DFP-0
[   766.231] (==) NVIDIA(0): 
[   766.231] (==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
[   766.231] (==) NVIDIA(0):     will be used as the requested mode.
[   766.231] (==) NVIDIA(0): 
[   766.232] (II) NVIDIA(0): Validated modes:
[   766.232] (II) NVIDIA(0):     "nvidia-auto-select"
[   766.232] (II) NVIDIA(0): Virtual screen size determined to be 1920 x 1080
[   766.287] (WW) NVIDIA(0): ONK TX-NR609 (DFP-0)'s EDID does not contain a maximum image
[   766.287] (WW) NVIDIA(0):     size; cannot compute DPI from ONK TX-NR609 (DFP-0)'s
[   766.288] (WW) NVIDIA(0):     EDID.
[   766.288] (==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
[   766.288] (--) Depth 24 pixmap format is 32 bpp
[   766.288] (II) NVIDIA: Using 768.00 MB of virtual memory for indirect memory access.
[   766.304] (II) NVIDIA(0): Setting mode "nvidia-auto-select"
[   766.345] (II) Loading extension NV-GLX
[   766.438] (==) NVIDIA(0): Disabling shared memory pixmaps
[   766.439] (==) NVIDIA(0): Backing store disabled
[   766.439] (==) NVIDIA(0): Silken mouse enabled
[   766.440] (==) NVIDIA(0): DPMS enabled
[   766.440] (II) Loading extension NV-CONTROL
[   766.442] (II) Loading extension XINERAMA
[   766.442] (II) Loading sub module "dri2"
[   766.442] (II) LoadModule: "dri2"
[   766.444] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
[   766.444] (II) Module dri2: vendor="X.Org Foundation"
[   766.444] 	compiled for 1.11.3, module version = 1.2.0
[   766.445] 	ABI class: X.Org Server Extension, version 6.0
[   766.445] (II) NVIDIA(0): [DRI2] Setup complete
[   766.445] (II) NVIDIA(0): [DRI2]   VDPAU driver: nvidia
[   766.445] (==) RandR enabled
[   766.445] (II) Initializing built-in extension Generic Event Extension
[   766.445] (II) Initializing built-in extension SHAPE
[   766.445] (II) Initializing built-in extension MIT-SHM
[   766.445] (II) Initializing built-in extension XInputExtension
[   766.445] (II) Initializing built-in extension XTEST
[   766.445] (II) Initializing built-in extension BIG-REQUESTS
[   766.445] (II) Initializing built-in extension SYNC
[   766.445] (II) Initializing built-in extension XKEYBOARD
[   766.445] (II) Initializing built-in extension XC-MISC
[   766.445] (II) Initializing built-in extension SECURITY
[   766.445] (II) Initializing built-in extension XINERAMA
[   766.445] (II) Initializing built-in extension XFIXES
[   766.446] (II) Initializing built-in extension RENDER
[   766.446] (II) Initializing built-in extension RANDR
[   766.446] (II) Initializing built-in extension COMPOSITE
[   766.446] (II) Initializing built-in extension DAMAGE
[   766.446] (II) Initializing extension GLX
[   766.566] (II) XKB: reuse xkmfile /var/lib/xkb/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
[   766.579] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[   766.579] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[   766.579] (II) LoadModule: "evdev"
[   766.580] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.581] (II) Module evdev: vendor="X.Org Foundation"
[   766.581] 	compiled for 1.11.3, module version = 2.7.0
[   766.581] 	Module class: X.Org XInput Driver
[   766.581] 	ABI class: X.Org XInput driver, version 16.0
[   766.582] (II) Using input driver 'evdev' for 'Power Button'
[   766.582] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.582] (**) Power Button: always reports core events
[   766.582] (**) evdev: Power Button: Device: "/dev/input/event1"
[   766.582] (--) evdev: Power Button: Vendor 0 Product 0x1
[   766.582] (--) evdev: Power Button: Found keys
[   766.582] (II) evdev: Power Button: Configuring as keyboard
[   766.582] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1/event1"
[   766.582] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[   766.583] (**) Option "xkb_rules" "evdev"
[   766.583] (**) Option "xkb_model" "pc105"
[   766.583] (**) Option "xkb_layout" "us"
[   766.585] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[   766.585] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[   766.585] (II) Using input driver 'evdev' for 'Power Button'
[   766.585] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.586] (**) Power Button: always reports core events
[   766.586] (**) evdev: Power Button: Device: "/dev/input/event0"
[   766.586] (--) evdev: Power Button: Vendor 0 Product 0x1
[   766.586] (--) evdev: Power Button: Found keys
[   766.586] (II) evdev: Power Button: Configuring as keyboard
[   766.586] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input0/event0"
[   766.586] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 7)
[   766.587] (**) Option "xkb_rules" "evdev"
[   766.587] (**) Option "xkb_model" "pc105"
[   766.587] (**) Option "xkb_layout" "us"
[   766.589] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:1028 (/dev/input/event3)
[   766.590] (**) Logitech Unifying Device. Wireless PID:1028: Applying InputClass "evdev pointer catchall"
[   766.590] (II) Using input driver 'evdev' for 'Logitech Unifying Device. Wireless PID:1028'
[   766.590] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.590] (**) Logitech Unifying Device. Wireless PID:1028: always reports core events
[   766.590] (**) evdev: Logitech Unifying Device. Wireless PID:1028: Device: "/dev/input/event3"
[   766.590] (--) evdev: Logitech Unifying Device. Wireless PID:1028: Vendor 0x46d Product 0xc52b
[   766.590] (--) evdev: Logitech Unifying Device. Wireless PID:1028: Found 20 mouse buttons
[   766.591] (--) evdev: Logitech Unifying Device. Wireless PID:1028: Found scroll wheel(s)
[   766.591] (--) evdev: Logitech Unifying Device. Wireless PID:1028: Found relative axes
[   766.591] (--) evdev: Logitech Unifying Device. Wireless PID:1028: Found x and y relative axes
[   766.591] (II) evdev: Logitech Unifying Device. Wireless PID:1028: Configuring as mouse
[   766.591] (II) evdev: Logitech Unifying Device. Wireless PID:1028: Adding scrollwheel support
[   766.591] (**) evdev: Logitech Unifying Device. Wireless PID:1028: YAxisMapping: buttons 4 and 5
[   766.591] (**) evdev: Logitech Unifying Device. Wireless PID:1028: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[   766.591] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:04.0/usb3/3-4/3-4:1.2/0003:046D:C52B.0003/input/input3/event3"
[   766.591] (II) XINPUT: Adding extended input device "Logitech Unifying Device. Wireless PID:1028" (type: MOUSE, id 8)
[   766.592] (II) evdev: Logitech Unifying Device. Wireless PID:1028: initialized for relative axes.
[   766.593] (**) Logitech Unifying Device. Wireless PID:1028: (accel) keeping acceleration scheme 1
[   766.593] (**) Logitech Unifying Device. Wireless PID:1028: (accel) acceleration profile 0
[   766.593] (**) Logitech Unifying Device. Wireless PID:1028: (accel) acceleration factor: 2.000
[   766.593] (**) Logitech Unifying Device. Wireless PID:1028: (accel) acceleration threshold: 4
[   766.594] (II) config/udev: Adding input device Logitech Unifying Device. Wireless PID:1028 (/dev/input/mouse0)
[   766.594] (II) No input driver specified, ignoring this device.
[   766.594] (II) This device may have been added with another device file.
[   766.596] (II) config/udev: Adding input device Chicony USB Wireless HID Receiver (/dev/input/event12)
[   766.596] (**) Chicony USB Wireless HID Receiver: Applying InputClass "evdev keyboard catchall"
[   766.596] (II) Using input driver 'evdev' for 'Chicony USB Wireless HID Receiver'
[   766.597] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.597] (**) Chicony USB Wireless HID Receiver: always reports core events
[   766.597] (**) evdev: Chicony USB Wireless HID Receiver: Device: "/dev/input/event12"
[   766.597] (--) evdev: Chicony USB Wireless HID Receiver: Vendor 0x4f2 Product 0x618
[   766.597] (--) evdev: Chicony USB Wireless HID Receiver: Found keys
[   766.597] (II) evdev: Chicony USB Wireless HID Receiver: Configuring as keyboard
[   766.597] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:06.0/usb4/4-5/4-5:1.0/input/input12/event12"
[   766.597] (II) XINPUT: Adding extended input device "Chicony USB Wireless HID Receiver" (type: KEYBOARD, id 9)
[   766.597] (**) Option "xkb_rules" "evdev"
[   766.597] (**) Option "xkb_model" "pc105"
[   766.598] (**) Option "xkb_layout" "us"
[   766.600] (II) config/udev: Adding input device Chicony USB Wireless HID Receiver (/dev/input/event13)
[   766.600] (II) No input driver specified, ignoring this device.
[   766.600] (II) This device may have been added with another device file.
[   766.601] (II) config/udev: Adding input device Chicony USB Wireless HID Receiver (/dev/input/event14)
[   766.601] (**) Chicony USB Wireless HID Receiver: Applying InputClass "evdev keyboard catchall"
[   766.601] (II) Using input driver 'evdev' for 'Chicony USB Wireless HID Receiver'
[   766.602] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.602] (**) Chicony USB Wireless HID Receiver: always reports core events
[   766.602] (**) evdev: Chicony USB Wireless HID Receiver: Device: "/dev/input/event14"
[   766.602] (--) evdev: Chicony USB Wireless HID Receiver: Vendor 0x4f2 Product 0x618
[   766.602] (--) evdev: Chicony USB Wireless HID Receiver: Found 1 mouse buttons
[   766.602] (--) evdev: Chicony USB Wireless HID Receiver: Found scroll wheel(s)
[   766.602] (--) evdev: Chicony USB Wireless HID Receiver: Found relative axes
[   766.602] (II) evdev: Chicony USB Wireless HID Receiver: Forcing relative x/y axes to exist.
[   766.603] (--) evdev: Chicony USB Wireless HID Receiver: Found absolute axes
[   766.603] (II) evdev: Chicony USB Wireless HID Receiver: Forcing absolute x/y axes to exist.
[   766.603] (--) evdev: Chicony USB Wireless HID Receiver: Found keys
[   766.603] (II) evdev: Chicony USB Wireless HID Receiver: Configuring as mouse
[   766.603] (II) evdev: Chicony USB Wireless HID Receiver: Configuring as keyboard
[   766.603] (II) evdev: Chicony USB Wireless HID Receiver: Adding scrollwheel support
[   766.603] (**) evdev: Chicony USB Wireless HID Receiver: YAxisMapping: buttons 4 and 5
[   766.603] (**) evdev: Chicony USB Wireless HID Receiver: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[   766.603] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:06.0/usb4/4-5/4-5:1.1/input/input14/event14"
[   766.603] (II) XINPUT: Adding extended input device "Chicony USB Wireless HID Receiver" (type: KEYBOARD, id 10)
[   766.603] (**) Option "xkb_rules" "evdev"
[   766.603] (**) Option "xkb_model" "pc105"
[   766.604] (**) Option "xkb_layout" "us"
[   766.604] (II) evdev: Chicony USB Wireless HID Receiver: initialized for relative axes.
[   766.604] (WW) evdev: Chicony USB Wireless HID Receiver: ignoring absolute axes.
[   766.605] (**) Chicony USB Wireless HID Receiver: (accel) keeping acceleration scheme 1
[   766.605] (**) Chicony USB Wireless HID Receiver: (accel) acceleration profile 0
[   766.605] (**) Chicony USB Wireless HID Receiver: (accel) acceleration factor: 2.000
[   766.605] (**) Chicony USB Wireless HID Receiver: (accel) acceleration threshold: 4
[   766.606] (II) config/udev: Adding input device Chicony USB Wireless HID Receiver (/dev/input/event15)
[   766.607] (**) Chicony USB Wireless HID Receiver: Applying InputClass "evdev keyboard catchall"
[   766.607] (II) Using input driver 'evdev' for 'Chicony USB Wireless HID Receiver'
[   766.607] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[   766.607] (**) Chicony USB Wireless HID Receiver: always reports core events
[   766.607] (**) evdev: Chicony USB Wireless HID Receiver: Device: "/dev/input/event15"
[   766.607] (--) evdev: Chicony USB Wireless HID Receiver: Vendor 0x4f2 Product 0x618
[   766.607] (--) evdev: Chicony USB Wireless HID Receiver: Found absolute axes
[   766.607] (--) evdev: Chicony USB Wireless HID Receiver: Found absolute multitouch axes
[   766.608] (--) evdev: Chicony USB Wireless HID Receiver: Found x and y absolute axes
[   766.608] (--) evdev: Chicony USB Wireless HID Receiver: Found keys
[   766.608] (II) evdev: Chicony USB Wireless HID Receiver: Configuring as mouse
[   766.608] (II) evdev: Chicony USB Wireless HID Receiver: Configuring as keyboard
[   766.608] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:06.0/usb4/4-5/4-5:1.1/input/input15/event15"
[   766.608] (II) XINPUT: Adding extended input device "Chicony USB Wireless HID Receiver" (type: KEYBOARD, id 11)
[   766.608] (**) Option "xkb_rules" "evdev"
[   766.608] (**) Option "xkb_model" "pc105"
[   766.608] (**) Option "xkb_layout" "us"
[   766.611] (II) evdev: Chicony USB Wireless HID Receiver: initialized for absolute axes.
[   766.611] 
Backtrace:
[   766.612] 0: /usr/bin/X (xorg_backtrace+0x37) [0xb3d627]
[   766.612] 1: /usr/bin/X (0x9b5000+0x18c3aa) [0xb413aa]
[   766.612] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0x5c240c]
[   766.612] 3: /lib/i386-linux-gnu/libc.so.6 (0x61d000+0x1312c0) [0x74e2c0]
[   766.612] 4: /usr/bin/X (XIChangeDeviceProperty+0x16c) [0xad5afc]
[   766.612] 5: /usr/lib/xorg/modules/input/evdev_drv.so (0x3a5000+0x634e) [0x3ab34e]
[   766.612] 6: /usr/lib/xorg/modules/input/evdev_drv.so (0x3a5000+0x6595) [0x3ab595]
[   766.612] 7: /usr/bin/X (ActivateDevice+0x66) [0x9e12e6]
[   766.612] 8: /usr/bin/X (0x9b5000+0x8cc05) [0xa41c05]
[   766.613] 9: /usr/bin/X (0x9b5000+0x9b142) [0xa50142]
[   766.613] 10: /usr/bin/X (0x9b5000+0x9b9b3) [0xa509b3]
[   766.613] 11: /usr/bin/X (config_init+0x14) [0xa4fa14]
[   766.613] 12: /usr/bin/X (InitInput+0xfd) [0xa2fedd]
[   766.613] 13: /usr/bin/X (0x9b5000+0x2524e) [0x9da24e]
[   766.613] 14: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x6364d3]
[   766.613] 15: /usr/bin/X (0x9b5000+0x255e9) [0x9da5e9]
[   766.614] Segmentation fault at address 0x123
[   766.614] 
Caught signal 11 (Segmentation fault). Server aborting
[   766.614] 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
[   766.614] Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[   766.614] 
[   766.652] (II) evdev: Power Button: Close
[   766.652] (II) UnloadModule: "evdev"
[   766.652] (II) Unloading evdev
[   766.704] (II) evdev: Power Button: Close
[   766.704] (II) UnloadModule: "evdev"
[   766.704] (II) Unloading evdev
[   766.732] (II) evdev: Logitech Unifying Device. Wireless PID:1028: Close
[   766.732] (II) UnloadModule: "evdev"
[   766.732] (II) Unloading evdev
[   766.788] (II) evdev: Chicony USB Wireless HID Receiver: Close
[   766.788] (II) UnloadModule: "evdev"
[   766.788] (II) Unloading evdev
[   766.872] (II) evdev: Chicony USB Wireless HID Receiver: Close
[   766.872] (II) UnloadModule: "evdev"
[   766.872] (II) Unloading evdev
[   766.872] (II) UnloadModule: "evdev"
[   766.872] (II) Unloading evdev
[   768.338]  ddxSigGiveUp: Closing log
[   768.339] Server terminated with error (1). Closing log file.