intel_error_decode man page
intel_error_decode — Decodes an Intel GPU dump automatically captured by the kernel at the time of an error.
intel_error_decode intel_error_decode [ filename ]
intel_error_decode is a tool that decodes the instructions and state of the GPU at the time of an error. It requires kernel 2.6.34 or newer, and either debugfs mounted on /sys/kernel/debug or /debug containing a current i915_error_state or you can pass a file containing a saved error.
Decodes a previously saved error.