now every kernel invocation, regardless of arguments
counts and array sizes, fails
i.e. including ones that worked in 1.0.2-1? Do they use the 'local' memory space (which triggers a third known bug on Haswell)?

drm_intel_gem_bo_context_exec() failed: Invalid argument
That's the error check added by this patch, but not the same error code as I get for a too-large array on Ivy Bridge (that's "drm_intel_gem_bo_context_exec() failed: No space left on device"), so may be it catching a different bug.

I will report this upstream.

sudo cat /sys/module/i915/parameters/enable_cmd_parser
returns 1
That means you don't have the #767148 workaround enabled. Does it ( sudo echo 0 > /sys/module/i915/parameters/enable_cmd_parser ) help?

What are your other i915 parameters ( sudo head /sys/module/i915/parameters/* )?


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