Kertesz Laszlo <laszlo.kertesz-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> 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.

I found a bug -- glamor_xv_put_image was mis-computing the number of
lines of changed video when the client drew only a subset of the
image. I think the client is drawing at src_y=1, src_h=239 for some
weird reason (I suspect a bug in the client).

Try this patch: