My ubuntu mining rig (2x6970; 1x 5830; 1x 6870) running pheonix on bitcoins.lc is crashing one or twice a week (I reboot and restart when it happens)...it's stable enough that I didn't do anything about it so far but it's getting irritating in the long run. Warmest card is at 79ºC (6970), coolest (5830) at 60ºC. When it crashes the screen simply goes black.
What would be the right way to debug this? Is there a way to log what happens or my only hope is to tweak my pheonix settings?
When these things happen to me, I usually just back the clocks down a little to see if it stabilizes and move on. It is better to run a little slower and never crash then get a couple of more Mh and have to deal with it.