[Intel-gfx] [PATCH] drm/i915: Revert i915.semaphore=1 default from 47ae63e0
keithp at keithp.com
Tue May 24 10:46:07 PDT 2011
On Tue, 24 May 2011 13:10:27 -0400, Andrew Lutomirski <luto at mit.edu> wrote:
> I'm getting hangs on my X220 Core i7 laptop as well with 2.6.39 and
> i915.semaphores=1. They're not as reliable -- sometimes the system
> hangs on log in, sometimes after a few seconds, and sometimes it
> doesn't hang.
That's consistent with our theory at least -- lockups caused by GPU/CPU
interactions, which occur far more often with semaphores disabled, but
still occur with semaphores enabled.
We're working on it...
keith.packard at intel.com
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