<div class="gmail_quote">On Wed, Feb 8, 2012 at 18:53, Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> These fix many GPU hangs for Eugeni, though not on my machine for some reason. Oddly, the register writes to UCGCTL2 and SQ_CHICKEN_MBCUNIT_CONFIG stick, but the writes to L3_CHICKEN_MODE, L3CNTLREG1, and COMMON_SLICE_CHICKEN1 don't seem to take effect. Currently no theories why. Manually writing these values with intel_reg_write /does/ fix the hangs for me. I'm fine with these going to -fixes. They seem to help some people, and I highly doubt they'll make anything worse. It'd be nice to understand why the register writes aren't sticking, though... </blockquote><div> Complementing Ken's mail, Li Bo from our QA team has did a full round of tests with these patches on IVB and all known issues were gone apparently. Keith, Jesse - I think they are good -fixes candidates at this point. </div></div>-- Eugeni Dodonov<a href="http://eugeni.dodonov.net/" target="_blank"> </a>