So guys, ckolivas asked me some hours ago to report back with a "windows lost again" setup!
MSI 6970 Lightning @945c/1375m
export GPU_USE_SYNC_OBJECTS=0
was set to 1 for bitcoins cpu hogging
export GPU_MAX_ALLOC_PERCENT=40
you need to get the value specific for your card set! 100 crashes kernel for me 30 drops hashrate to 70kh/s
./cgminer --scrypt --shaders 1538 -I 16
Yes, exactly! I did not set anything else..
Results in
GPU 0: | 428.2/ 434.0Kh/s | A:11354 R:140 HW:0 U:24.57/m I:16
for windows it was some like 390Kh/s with U averaging at <22/m