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.
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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