Hi, I have a WRT1900acsv2 that is unstable - after a few hours, it locks up (crashes, becomes unresponsive, wireless is lost etc) and needs resetting, rebooting or even booting from the alternative partition...
I've reflashed it with - OpenWRT, ROOter, Gargoyle (all based on OpenWRT) and also reflashed it back to stock Linksys. It seems most stable with Gargoyle (which is the smallest build, but this may be a red herring).
The only real clue I have is that I suspect the CPU is maybe overheating? When Gargoyle is installed, the CPU temperature is displayed and reaches 74 or 75C. Is this overheating? My next move is probably to remove the case to improve ventilation, or maybe stick a small fan outside the case.