Bug 48455

Summary:	Enabling R600_STREAMOUT causes graphical corruption
Product:	Mesa	Reporter:	Boudhayan Gupta <me>
Component:	Drivers/Gallium/r600	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:
Severity:	major
Priority:	medium
Version:	git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Boudhayan Gupta 2012-04-09 01:58:14 UTC

I use Mesa from Git (on an Arch Linux box), and build a new copy weekly. Since the last two weeks, keeping R600_STREAMOUT enabled in my /etc/environment file leads to severe graphical corruption (the screen is completely garbled), making it unusable on my Gnome 3 based system. Both GDM and GNOME-Shell exhibit this corruption, making it impossible to conduct tests on the system.

Here are some relevant outputs:

/etc/environment:
LIBGL_DRIVERS_PATH=/opt/mesa-master/lib/xorg/modules/dri
VDPAU_DRIVER=r600
R600_GLSL130=1
#R600_STREAMOUT=1

Keeping the last line enabled causes issues. Also, uname -a:

Linux bg14ina-laptop 3.3.1-2-ck #1 SMP PREEMPT Thu Apr 5 18:01:36 EDT 2012 x86_64 Intel(R) Core(TM)2 Duo CPU T6670 @ 2.20GHz GenuineIntel GNU/Linux

glxinfo | grep -i opengl:

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD RV710
OpenGL version string: 2.1 Mesa 8.1-devel (git-c653287)
OpenGL shading language version string: 1.30

Relevant line from lspci:01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV710 [Mobility Radeon HD 4300 Series]

The card is a 512 MB ATI Mobility Radeon HD4330, (VID:PID = 1002:9552)

Other software versions are:
xorg-server 1.12.0.901-1
xf86-video-ati 6.14.4-2
libdrm 2.4.33-1
libtxc_dxtn 1.0.1-2

The flags to configure when building Mesa from git:

./configure --prefix=/opt/mesa-master --with-dri-driverdir=/opt/mesa-master/lib/xorg/modules/dri --with-gallium-drivers=r300,r600,swrast --with-dri-drivers=swrast --enable-texture-float --enable-glx-tls --enable-xcb --enable-shared-dricore --enable-gbm --enable-gallium-gbm --enable-xvmc --enable-vdpau --enable-gallium-g3dvl --enable-osmesa --enable-xorg --enable-shared-glapi --enable-gles1 --enable-gles2 --enable-openvg --enable-gallium-egl

If there's anything else I can post, please let me know.

Comment 1 Andreas Boll 2012-08-09 15:21:05 UTC

You need kernel 3.5 and mesa from git.
There were streamout fixes in both kernel and mesa especially for r700.
Additionally you don't need to set R600_GLSL130=1 and R600_STREAMOUT=1 anymore,
both have been enabled by default in mesa master.

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