[Bug 226495] graphics/mesa-dri: GPU freeze on Sandy Bridge system

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226495

--- Comment #3 from rkoberman at gmail.com ---
(In reply to Carlos J. Puga Medina from comment #2)
Thanks for the suggestions, Carlos.

I seem to have a dilemma. I need to have VTd enabled to support my Windows 7
virtual system, so the question is whether VTd with semaphore is more stable
than VTd without it.

>From the blog, it is not clear to me that enabling rc6 is related to my problem
or just a good thing to do. In any case, I had already been running with it set
to '5'. There was a note that a bug in Sandy Bridge could lead to hangs if bit
1 was set, though a later note indicated that an update to the DRM code might
disable that optimization on affected Sandy Bridge systems. This is from old
memory as I have been running it at '5' for several years.

I'll monitor for errors and see of the semaphore makes things better or worse.

Finally, where did "Robert" come from? I have not used that name for almost 60
years, though that is my first name. I started using my middle name in first
grade. I'd like to find the source of any such reference and squash it, if
possible.

Again, thanks!
Kevin

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