<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [regression] [bisected] i915 GPU HANG: ecode 7:1:0xfffffffe on Kernel 5.1.x and 5.2rc1 to 5.2rc6" href="https://bugs.freedesktop.org/show_bug.cgi?id=111014#c37">Comment # 37</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [regression] [bisected] i915 GPU HANG: ecode 7:1:0xfffffffe on Kernel 5.1.x and 5.2rc1 to 5.2rc6" href="https://bugs.freedesktop.org/show_bug.cgi?id=111014">bug 111014</a> from <a class="email" href="mailto:digetx@gmail.com" title="Dmitry Osipenko <digetx@gmail.com>"> Dmitry Osipenko</a> <pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=111014#c18">comment #18</a>) > See commit 928f8f42310f244501a7c70daac82c196112c190 > Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> > Date: Fri Apr 19 12:17:47 2019 +0100 > > drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context > > Despite what I think the prm recommends, commit f2253bd9859b > ("drm/i915/ringbuffer: EMIT_INVALIDATE after switch context") turned out > to be a huge mistake when enabling Ironlake contexts as the GPU would > hang on either a MI_FLUSH or PIPE_CONTROL immediately following the > MI_SET_CONTEXT of an active mesa context (more vanilla contexts, e.g. > simple rendercopies with igt, do not suffer). This fixes super-annoying hangs on Ivy Bridge with v5.1.15. Thanks for the pointer!</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>