oclhashcat-"display driver stopped working....."

[yodabit]

Thanks for the workaround. I'm attacking a WPA2 handshake with a 4+ gb dictionary. Interestingly, I discovered that if I use the same 4gh dictionary with a rule..say best64...its runs fine and strangely the card runs cooler....been running for 2 days. Adding the rule triples the run time....the hashrate is the same...so its doing more work. Somehow the GPU seems to be under less stress.

I never had this issue with older versions of ocl using the same hd 5870.

I'm using hashcat gui w/ Windows 7 so I guess I would add those augments to a custom command line.

Thanks again for your help.

That usually has some relation to a "high load" on the gpu and is for example notorious in the combination of older cards and expensive algos like bcrypt.

You can work around this by tuning your attack with these options:
-n, --gpu-accel=NUM Workload tuning: 1, 8, 40, 80, 160
-u, --gpu-loops=NUM Workload fine-tuning: 8 - 1024

As you lower them you may find a point where the attack will run without crashing the driver.