Mac OS X 10.8 crashes after disconnecting the Thunderbolt display

Wondering if anyone can help my Mac OS X 10.8.5 crashes after I disconnect the thunderbolt display.
I normally work in the studio with my macbook connected to an external display.
When I go to use it without the thunderbolt display it crashes - 4 times in one day, which really isn't ideal when your freelancing.
I've checked my log files and I have a list of panic reports. I'm not too sure what I'm supposed to be looking for, but each of the reports refer to the graphics control. I've read online it might have something to do with the display sleep, so I've reset that.
GPU Panic: [<None>] 5 3 7f 0 0 0 0 3 : NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff808013e000 0x0a5480a2, D0, P3/4\n"@/SourceCache/AppleGraphicsControl/AppleGraphicsControl-3.4.5/src/AppleM uxControl/kext/GPUPanic.cpp:127
I'd be very grateful if anyone could help
Chloe

Hi Chloebat,
I'm sorry to hear you are having issues with your MacBook Pro. If you continue to have intermittent but persistent crashing issues with your Mac, possibly related to the display, you may find the troubleshooting steps outlined in the following article helpful:
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem." - Apple Support
Regards,
- Brenden

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