[Bug 91800] New: [bisected] flickering in The Talos Principle

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Aug 29 07:40:32 PDT 2015


https://bugs.freedesktop.org/show_bug.cgi?id=91800

            Bug ID: 91800
           Summary: [bisected] flickering in The Talos Principle
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: notasas at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117983
  --> https://bugs.freedesktop.org/attachment.cgi?id=117983&action=edit
Xorg.log

CPU: Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz
OS: Ubuntu 14.04
kernel: 4.2.0-rc8+
mesa: git master (c8a61ea4fbcb)
libdrm: git 56d8dd6a9c0
xf86-video-intel: git master (300319e2044c)
other components should be stock Ubuntu 14.04 (desktop environment: Xfce 4.10)

When playing The Talos Principle in windowed mode, there is severe
flickering/stuttering. I've noticed that xf86-video-intel from stock Ubuntu
14.04 has no such problem, so ran bisect which resulted in:

commit 72d208a7f2f0e8f2d93483e535154f34a8a26d81
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Mar 5 12:26:15 2015 +0000

    sna/dri2: Perform swap elision on windows for swap-interval==0

The commit doesn't revert, but checking out, building and installing
72d208a7f2^ gives properly working game after restarting Xorg.

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