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[Silence9123 <carphil@xxxxxxxxx>]

I have the exact same issue.
I have a Saitek Eclipse ii keyboard.
It disables my Dell mouse.
I'm on Red Hat Enterprise Linux Workstation release 6.5 (Santiago).
Kernel: Linux 2.6.32-573.3.1.el6.x86_64

I know this is an Ubuntu forum but I wanted to give context...

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https://bugs.launchpad.net/bugs/1352374

Title:
  changing backlight color on saitek eclipse 2 keyboard causes mouse
  failure

Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  This has apparently been ongoing for  a long time.  I have a Saitek
  Eclipse ii keyboard and I and others report that when you click the
  keyboard button to change the back light color, it triggers mouse
  events.  These end up disabling the mouse, in my case Microsoft
  Intellimouse.  Unplugging and replugging the USB cable for the
  keyboard resets function to normal with the default blue back light
  color.  If you try to change the color, the problem returns.  I am now
  running 64 bit 14.04 and the problem has been with me since at least
  12.04.   If I change the backlight color while the system is booting
  up but before the log in screen appears, I can select the color I want
  the keyboard to be, but if I wait till after the log in screen
  appears, then the mouse is non-functional when the desktop loads until
  I log off and back on.

  Here is some relevant data from a report on Ubuntu forums
  (http://ubuntuforums.org/showthread.php?t=2174670) about this exact
  problem...

  /dev/input/event5
  bustype : BUS_USB
  vendor : 0x6a3
  product : 0x8021
  version : 273
  name : "Chicony Saitek Eclipse II Keyboa"
  phys : "usb-0000:00:1d.0-1/input0"
  uniq : ""
  bits ev : EV_SYN EV_KEY EV_MSC EV_LED EV_REP

  
  /dev/input/event6
  bustype : BUS_USB
  vendor : 0x6a3
  product : 0x8021
  version : 273
  name : "Chicony Saitek Eclipse II Keyboa"
  phys : "usb-0000:00:1d.0-1/input1"
  uniq : ""
  bits ev : EV_SYN EV_KEY EV_MSC

  
  The feature that causes the problem here is the button to turn on/off/change the kb backlight color. input-events for /dev/input/event6:

  
  First press (backlight off->blue): emulates left click
  19:43:40.885931: EV_MSC MSC_SCAN -16646143
  19:43:40.885936: EV_KEY BTN_0 (0x100) pressed
  19:43:40.885941: EV_MSC MSC_SCAN -16646140
  19:43:40.885942: EV_KEY BTN_3 (0x103) released
  19:43:40.885943: EV_SYN code=0 value=0

  
  Second press (blue->red): emulates middle click
  19:43:43.101984: EV_MSC MSC_SCAN -16646143
  19:43:43.101989: EV_KEY BTN_0 (0x100) released
  19:43:43.101992: EV_MSC MSC_SCAN -16646142
  19:43:43.101992: EV_KEY BTN_1 (0x101) pressed
  19:43:43.101996: EV_SYN code=0 value=0

  
  Third press (red->purple): emulates right click
  19:43:38.005865: EV_MSC MSC_SCAN -16646142
  19:43:38.005869: EV_KEY BTN_1 (0x101) released
  19:43:38.005871: EV_MSC MSC_SCAN -16646141
  19:43:38.005872: EV_KEY BTN_2 (0x102) pressed
  19:43:38.005874: EV_SYN code=0 value=0

  
  Fourth press (purple->off) emulates ???
  19:43:39.765915: EV_MSC MSC_SCAN -16646141
  19:43:39.765921: EV_KEY BTN_2 (0x102) released
  19:43:39.765925: EV_MSC MSC_SCAN -1664614019
  19:43:39.765926: EV_KEY BTN_3 (0x103) pressed
  19:43:39.765928: EV_SYN code=0 value=0

  So, the backlight changing on a keyboard act as different types of
  mouse clicks based on what color you switch to. Apparently this
  problem is also present in PCLinuxOS.  Is this possibly a Udev issue?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  8 19:32:30 PST 2014
   GCC version:  gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,mousepoll,snap,move,vpswitch,regex,place,animation,session,imgpng,grid,gnomecompat,wall,resize,expo,unitymtgrabhandles,workarounds,fade,ezoom,scale,unityshell]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Mon Aug  4 09:47:36 2014
  DistUpgraded: 2014-08-02 23:43:24,960 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   NVIDIA Corporation GF116 [GeForce GTX 550 Ti] [10de:1244] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: eVga.com. Corp. Device [3842:1556]
  InstallationDate: Installed on 2009-11-04 (1733 days ago)
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  MachineType: To be filled by O.E.M. To be filled by O.E.M.
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=59092ad5-f628-4cfa-859e-9236256eac88 ro quiet splash
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-08-03 (1 days ago)
  dmi.bios.date: 01/16/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1503
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: M5A97 R2.0
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1503:bd01/16/2013:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A97R2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: To be filled by O.E.M.
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.ia32-libs: ia32-libs 20090808ubuntu36
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Mon Aug  4 09:25:50 2014
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.15.1-0ubuntu2

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