dual cgminer instances (scrypt) crash driver

[carly200]

Hi,

I have a 280x and a 290 in my clean setup system.
I finetuned them individually and now tried to setup 2 cgminer instances (in seperate folders) and with --device 0/1 --remove-disabled

unfortunateley the driver crashes seconds after i run cgminer for a second GPU



current results: if I lower tc on on of the cards to an absolute minimum (hashrate ist flatlining), driver crashes "later"...


any clue on what could cause this?


I also noticed that -auto-fan with two instances runs into trouble... (makes one card/fan spin up and down, like a whine constantly)

somehow the two instances don't run completely seperate... (is that possible?)


any hint on how to debug this?