[Bug 56405] Distorted graphics on Radeon HD 6620G

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56405

--- Comment #17 from Michael Dressel <mdrslmr at t-online.de> ---
(In reply to comment #14)
> (In reply to comment #13)


> Maybe it would be easier to just do manual builds instead of using PKGBUILD
> for the bisect? You can point to the directory containing the manually built
> r600_dri.so with the environment variable LIBGL_DRIVERS_PATH. You may also
> want to set LIBGL_DEBUG=verbose to verify it's picking up the expected
> r600_dri.so.

At which point would I need to have the environment setup in order to pick the
driver? Can I just stop gdm set the environment and start gdm with  systemctl?

> 
> Also, especially for older commits, you may need to run make clean or even
> autogen.sh between bisection steps to prevent inconsistent builds.

There are a lot of options. Which are relevant?
    COMMONOPTS="--prefix=/usr \
    --sysconfdir=/etc \
    --with-dri-driverdir=/usr/lib/xorg/modules/dri \
    --with-gallium-drivers=r300,r600,radeonsi,nouveau,svga,swrast \
    --with-dri-drivers=i915,i965,r200,radeon,nouveau,swrast \
    --enable-gallium-llvm \
    --enable-egl \
    --enable-gallium-egl \
    --with-egl-platforms=x11,drm \
    --enable-shared-glapi \
    --enable-gbm \
    --enable-glx-tls \
    --enable-dri \
    --enable-glx \
    --enable-osmesa \
    --enable-gles1 \
    --enable-gles2 \
    --enable-texture-float \
    --enable-xa \
    --enable-vdpau "

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