[CLOSED][Ubuntu 13.10]Game Crash When Shooting

I know there is already a topic on with this problem but there wasn't an answer.

So the title says it. This is my log file and my sysinfo:
Log File

I only have a old syslog because my syslog crashes since I have a nvidia driver.
Since then my syslog can't export the info of the NVIDIA tab so it crashes.

Here is the old Syslog

This is (I guess) the error in the log:

Error: lua/Globals.lua:459: attempt to index a nil value
[Server] Script Error #1: lua/Globals.lua:459: attempt to index a nil value
    Call stack:
    #1: GetHasVariant lua/Globals.lua:459
        data =  {1= {displayName="Normal", modelFilePart="", viewModelFilePart="" }, 2= {displayName="Shadow", modelFilePart="_shadow", productId=250893, viewModelFilePart="" } }
        var = nil
        client = ServerClient { }
    #2: f2 lua/GorgeVariantMixin.lua:54
        self = Gorge-865 {abilityEnergyOnChange=100, activeWeaponId=2197, alive=true, animateAngles=false, animateDistance=false, animatePosition=false, animateYOffset=false, animationBlend=0, animationGraphIndex=58, animationGraphNode=0, animationSequence2=-1, animationSequence=0, animationSpeed2=1, animationSpeed=1, animationStart2=0, animationStart=93.457458496094, armor=75, baseYaw=0, bellyYaw=0, blockPersonalResources=false, bodyYaw=-1.4835299253464, bodyYawRun=0, cameraDistance=0, canUseTunnel=true, celeritySpeedScalar=0, clientIndex=4, cloakRate=0, cloakingDesired=false, collisionRep=0, communicationStatus=1, countingDown=false, crouching=false, darkVisionSpectatorOn=false, darwinMode=false, desiredCameraAngles=cdata, desiredCameraDistance=0, desiredCameraPosition=cdata, desiredCameraYOffset=0, detected=false, dragsUmbra=false, electrified=false, enableTunnelEntranceCheck=false, energizeLevel=0, enzymed=false, flinchIntensity=0, followingTransition=false, fov=95, frozen=false, fullPrecisionOrigin=cdata, fullyCloaked=false, gameEffectsFlags=0, gameStarted=true, giveDamageTime=0, hasAdrenalineUpgrade=false, hasBellySlide=false, hatched=false, health=160, healthIgnored=false, hotGroupNumber=0, inCombat=false, infestationSpeedScalar=0, infestationSpeedUpgrade=false, isCatalysted=false, isMoveBlocked=false, isOnEntity=false, isOnFire=false, isUsing=false, jumpHandled=false, jumping=false, lastTakenDamageAmount=0, lastTakenDamageOrigin=cdata, lastTakenDamageTime=0, lastTargetId=-1, layer1AnimationBlend=0, layer1AnimationGraphNode=11, layer1AnimationSequence2=-1, layer1AnimationSequence=-1, layer1AnimationSpeed2=1

Does somebody knows how to fix this?