On Fri, 2014-12-26 at 12:17 +0900, Michel Dänzer wrote: 
> On 26.12.2014 12:10, Kertesz Laszlo wrote:
> > On Fri, 2014-12-26 at 10:26 +0900, Michel Dänzer wrote: 
> >> On 26.12.2014 09:01, Kertesz Laszlo wrote:
> >>> Attached gdb trace (crashed on latest git x server).
> >>
> >> Did it include commit 70a6f65f9e2b26ef7539dcacfcfea927bc1f13fd ('glamor:
> >> Make sure Xvideo source image data is properly aligned')? If not, does
> >> that help by any chance?
> >>
> >> If not, can you make sure debugging symbols are available for
> >> /usr/lib/x86_64-linux-gnu/xorg/modules/libglamoregl.so, and get another
> >> backtrace?
> >>
> >>
> > Yes i do have that commit (last is  modesetting: Add vblank
> > synchronization support when using Present.).
> > And i enabled debug in the xserver with --enable-debug, is there
> > something else i need to add for libglamoregl?
> 
> If you're building and installing packages from xserver Git, you may
> need to install the corresponding debugging package. Otherwise, make
> sure /usr/lib/x86_64-linux-gnu/xorg/modules/libglamoregl.so is actually
> the one you built from Git, and that it doesn't get stripped.
> 
> 

Ok, rebuilt the xserver package with debugging symbols (seems that
checkinstall strips stuff by default). I got a bigger gdb.txt. See if it
helps.