<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [BAT SNB regression] Fifo underruns since CI_DRM_952" href="https://bugs.freedesktop.org/show_bug.cgi?id=93640#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [BAT SNB regression] Fifo underruns since CI_DRM_952" href="https://bugs.freedesktop.org/show_bug.cgi?id=93640">bug 93640</a> from <a class="email" href="mailto:daniel@ffwll.ch" title="Daniel Vetter <daniel@ffwll.ch>"> Daniel Vetter</a> <pre>(In reply to Matt Roper from <a href="show_bug.cgi?id=93640#c3">comment #3</a>) > My above patch/comment was actually intended for <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [all] circular locking dependency detected: crtc_ww_class_mutex vs dev->mode_config.mutex" href="show_bug.cgi?id=93666">bug 93666</a>; disregard for > this defect since it likely isn't related to underruns. > > If I'm reading the CI details correctly, it's not just SNB that gets the > underruns, but also ILK and IVB. However HSW/BDW, which use pretty much the > same watermark logic and code, are fine. I'll take a look to see if I can > figure out the source of the problems. Unfortunately I don't have any of > these platforms at the moment so debugging is somewhat challenging. Yeah, I made the bug report before Tomi restored machines to operability (due to the ww mutex deadlock that killed them).</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>