[Bug 97022] Garbage in windows while running a game windowed - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 97022] Garbage in windows while running a game windowed
Date: Thu, 21 Jul 2016 13:19:31 +0000	[thread overview]
Message-ID: <bug-97022-502@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=97022

            Bug ID: 97022
           Summary: Garbage in windows while running a game windowed
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: peter.mulholland@vpltd.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 125226
  --> https://bugs.freedesktop.org/attachment.cgi?id=125226&action=edit
Photograph of screen when the problem occurs

This is an odd one, as of posting I have only managed to reproduce this when
using a Virtual Programming OpenGL 3.2 based game, such as The Witcher 2. I
have not been able to reproduce it with Valve's Source games.

For example, If you run The Witcher 2 in windowed mode, and allow it to get to
the menu screen, doing anything with another window (such as resizing) causes
the display to turn to junk. Eventually the whole X11 display will be corrupt,
and only rebooting the system will clear it. Text mode TTY's are unaffected.

Occasionally, rather than corruption, the system will lock up, requiring a hard
reset or magic sysrq reset. I could not find a way to consistently reproduce
this though, whereas I can consistently reproduce the corruption.

Specs:
Xubuntu 16.04.1 LTS
Kernel 4.0.0-31-generic, x86_64
Mesa 12.1.0-devel (Padoka PPA)
DRM 2.43.0
GPU Radeon HD 7750 (CAPE VERDE PCI 1002:683F), 1GB VRAM
Xorg 1.18.3
Desktop Xfce4 4.12, using builtin compositor

Disabling the compositor makes no difference. Restarting Xorg when the fault
occurs makes no difference.

The bug is not present in the 11.2.0 release of Mesa shipped with Ubuntu 16.04
by default.

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