<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BDW regression]igt/pm_pc8 subcases cause system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=77565#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BDW regression]igt/pm_pc8 subcases cause system hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=77565">bug 77565</a> from <a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> Guo Jinxian</a> <pre>fc1744ff7ba63cabf858c55217382104e9dd94ed is the first bad commit commit fc1744ff7ba63cabf858c55217382104e9dd94ed Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> Date: Thu Apr 10 09:01:40 2014 +0200 Revert "drm/i915: fix infinite loop at gen6_update_ring_freq" This reverts commit 4b28a1f3ef55a3b0b68dbab1fe6dbaf18e186710. This patch duct-tapes over some issue in the current bdw rps patches which must wait with enabling rc6/rps until the very first batch has been submitted by userspace. But those patches aren't merged yet, and for upstream we need to have an in-kernel emission of the very first batch. I shouldn't have merged this patch so let's revert it again. Also Imre noticed that even when rps is set up normally there's a small window (due to the 1s delay of the async rps init work) where we could runtime suspend already and blow up all over the place. Imre has a proper fix to block runtime pm until the rps init work has successfully completed. Cc: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>> Cc: Imre Deak <<a href="mailto:imre.deak@intel.com">imre.deak@intel.com</a>> Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> :040000 040000 c7c7c9b7e4dc136a3ac650c847e65f6913e83ba4 6e22952e0db97d29757b13b0a1dc6a4392d86f95 M drivers Reverted this commit, the case passed. Thanks.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>