Bug#775235: gnome-shell not starting with gdm3/mesa/llvm-3.4 but does start from startx & lightdm regardless

[Bernhard Übelacker <bernhardu@vr-web.de>]

Hello Philip,
probably your case is more an example for the problem described in bugs
#770130 and #776911.
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=770130
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=776911

When you rebuilt your mesa packages did you apply the patch mentioned in
message 15? And was package llvm-3.4-dev installed? If not, I would
assume that your rebuilt packages are also using llvm-3.5.

I have only tested both patches (message 15 and message 32) if they help
with the error "LLVM ERROR: Do not know how to split the result of this
operator!" inside a qemu VM.
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775235#15
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775235#32

If they could help with the "underrun" error on real hardware, as in
your case, I cannot say.

Kind regards,
Bernhard