<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Linux 4.5 regression: FIFO underruns on Skylake" href="https://bugs.freedesktop.org/show_bug.cgi?id=94337#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Linux 4.5 regression: FIFO underruns on Skylake" href="https://bugs.freedesktop.org/show_bug.cgi?id=94337">bug 94337</a> from <a class="email" href="mailto:luto@mit.edu" title="Andy Lutomirski <luto@mit.edu>"> Andy Lutomirski</a> <pre>I have not reproduced this problem in 4.6-rc1, so it might be fixed. If I had to guess, I'd say this was: commit bf22045250fafbe733277e13300eaa240ba2104d Author: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>> Date: Tue Jan 19 11:43:04 2016 -0800 Revert "drm/i915: Add two-stage ILK-style watermark programming (v10)" which is the fix for <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [BAT ILK SNB IVB bisected] Fifo underruns since CI_DRM_952" href="show_bug.cgi?id=93640">bug 93640</a>. I think there is something wrong with your release process. v4.5 has: commit e2e407dc093f530b771ee8bf8fe1be41e3cea8b3 Author: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>> AuthorDate: Mon Feb 8 11:05:28 2016 -0800 Commit: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>> CommitDate: Tue Feb 9 11:24:39 2016 +0200 drm/i915: Pretend cursor is always on for ILK-style WM calculations (v2) v4.6-rc1 also has: commit b2435692dbb709d4c8ff3b2f2815c9b8423b72bb Author: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>> AuthorDate: Tue Feb 2 22:06:51 2016 -0800 Commit: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>> CommitDate: Wed Feb 3 05:59:03 2016 -0800 drm/i915: Pretend cursor is always on for ILK-style WM calculations (v2) What gives? (I haven't confirmed that the latter is the change that fixes this.)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>