Hello, came across launchpad bug #1360241 [1] which discusses the same error. There it comes from ubuntu-ui-toolkit tests.
There they did revert their mesa package to depend on llvm-3.4 instead of llvm-3.5. So did I and recompiled mesa to use llvm-3.4 (see attached patch). And with these packages installed the error message was gone and the login screen is shown and a login possible. Going back to current jessie packages depending on llvm-3.5 lead to getting the error message again. Kind regards, Bernhard [1] https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.5/+bug/1360241 Rebuilding the mesa packages: root@debian:/home/benutzer# apt-get install debhelper quilt pkg-config libdrm-dev libx11-dev x11proto-gl-dev libxxf86vm-dev libexpat1-dev libxfixes-dev libxdamage-dev libxext-dev libvdpau-dev autoconf automake libtool x11proto-dri2-dev x11proto-dri3-dev x11proto-present-dev libx11-xcb-dev libxcb-dri2-0-dev libxcb-glx0-dev libxcb-xfixes0-dev libxcb-dri3-dev libxcb-present-dev libxcb-randr0-dev libxcb-sync-dev libxshmfence-dev libudev-dev flex bison llvm-3.4-dev libelf-dev libwayland-dev libclang-3.4-dev libclc-dev benutzer@debian:~$ mkdir mesa; cd mesa benutzer@debian:~/mesa$ apt-get source libgl1-mesa-dri benutzer@debian:~/mesa$ cd mesa-10.3.2 benutzer@debian:~/mesa/mesa-10.3.2$ patch -p1 --dry-run < ../switch-to-3.4.patch # change llvm 3.5 to 3.4 like https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.5/+bug/1360241 benutzer@debian:~/mesa/mesa-10.3.2$ dpkg-buildpackage -b root@debian:/home/benutzer/mesa# dpkg -i libegl1-mesa_10.3.2-1_i386.deb libegl1-mesa-drivers_10.3.2-1_i386.deb libgbm1_10.3.2-1_i386.deb libgl1-mesa-dri_10.3.2-1_i386.deb libgl1-mesa-dri-dbg_10.3.2-1_i386.deb libgl1-mesa-glx_10.3.2-1_i386.deb libglapi-mesa_10.3.2-1_i386.deb libopenvg1-mesa_10.3.2-1_i386.deb libwayland-egl1-mesa_10.3.2-1_i386.deb libxatracker2_10.3.2-1_i386.deb #reboot, error is gone root@debian:/home/benutzer# apt-get install --reinstall libegl1-mesa libegl1-mesa-drivers libgbm1 libgl1-mesa-dri libgl1-mesa-dri-dbg libgl1-mesa-glx libglapi-mesa libopenvg1-mesa libwayland-egl1-mesa libxatracker2 #reboot, error is visible again
diff -Nurp mesa-10.3.2.orig/debian/control mesa-10.3.2/debian/control --- mesa-10.3.2.orig/debian/control 2015-01-20 16:09:09.000000000 +0100 +++ mesa-10.3.2/debian/control 2015-01-20 16:15:14.772000000 +0100 @@ -37,10 +37,10 @@ Build-Depends: libudev-dev [linux-any], flex, bison, - llvm-3.5-dev (>= 1:3.5-1) [amd64 i386 kfreebsd-amd64 kfreebsd-i386 armhf], + llvm-3.4-dev [amd64 i386 kfreebsd-amd64 kfreebsd-i386 armhf], libelf-dev [amd64 i386 kfreebsd-amd64 kfreebsd-i386 armhf], libwayland-dev (>= 1.2.0) [linux-any], - libclang-3.5-dev (>= 1:3.5-1) [amd64 i386 armhf], + libclang-3.4-dev [amd64 i386 armhf], libclc-dev [amd64 i386 armhf], Vcs-Git: git://git.debian.org/git/pkg-xorg/lib/mesa Vcs-Browser: http://git.debian.org/?p=pkg-xorg/lib/mesa.git diff -Nurp mesa-10.3.2.orig/debian/rules mesa-10.3.2/debian/rules --- mesa-10.3.2.orig/debian/rules 2015-01-20 16:09:09.000000000 +0100 +++ mesa-10.3.2/debian/rules 2015-01-20 16:11:47.244000000 +0100 @@ -116,7 +116,7 @@ else ifneq (,$(filter $(DEB_HOST_ARCH),amd64 i386 kfreebsd-amd64 kfreebsd-i386 armhf)) GALLIUM_DRIVERS += radeonsi confflags_GALLIUM += --enable-gallium-llvm - confflags_GALLIUM += ac_cv_path_LLVM_CONFIG=llvm-config-3.5 + confflags_GALLIUM += ac_cv_path_LLVM_CONFIG=llvm-config-3.4 endif confflags_DIRECT_RENDERING = --enable-driglx-direct
