I installed CUDA 7.5 on a fresh EC2 g2.2xlarge running Ubuntu 14.04 (kernel 3.13.0-63-generic). Unfortunately the samples won’t run reliably. Sometimes I can run any sample any number of times. Other times, after a reboot, a sample may run a few times and then hang. This has been observed with deviceQuery as well. Once the application hangs, it can’t be interrupted or killed and the load average will climb with ksoftirqd dominating the CPU.
I would welcome suggestions on how to triage this.