[Bug 71870] Metro: Last Light rendering issues

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71870

--- Comment #3 from Paul Berry <stereotype441 at gmail.com> ---
(In reply to comment #2)
> update .. now Metro has started to crash on startup, bisected this to:
> 
> commit 068a073c1d4853b5c8f33efdeb481026f42e23a5
> Author: Paul Berry <stereotype441 at gmail.com>
> Date:   Tue Nov 19 13:31:20 2013 -0800
> 
>     meta: fix meta clear of layered framebuffers
> 
> backtrace:
> 
> (gdb) bt
> #0  0xf7747430 in __kernel_vsyscall ()
> #1  0xf73c11ef in ?? ()
> #2  0xf441f0fb in intel_upload_map () from /opt/lib/dri/i965_dri.so
> #3  0xf441f1bf in intel_upload_unmap () from /opt/lib/dri/i965_dri.so
> #4  0xf44a86d2 in brw::vec4_visitor::get_timestamp() () from
> /opt/lib/dri/i965_dri.so
> #5  0xf4443ab2 in brw_draw_destroy () from /opt/lib/dri/i965_dri.so
> #6  0xf4443e41 in brw_get_vertex_surface_type () from
> /opt/lib/dri/i965_dri.so
> #7  0xf42736b8 in vbo_VertexAttribP4uiv () from /opt/lib/dri/i965_dri.so
> #8  0xf4274402 in vbo_VertexAttribP4uiv () from /opt/lib/dri/i965_dri.so
> #9  0xf42747c7 in vbo_Materialfv () from /opt/lib/dri/i965_dri.so
> 
> If I revert this (and bb354c6c279031dafc08029a62cd3e76a6c1ca71) game works
> fine again. Will investigate what goes wrong.

The function calls in this backtrace don't make sense (looking at the source
code, vbo_VertexAttribP4uiv() never calls brw_get_vertex_surface_type(),
brw_get_vertex_surface_type() never calls brw_draw_destroy(), and so on).  Is
it possible that you've built libdrm without debugging symbols, and that's
causing you to get a corrupted backtrace?

If you can provide an apitrace that reproduces the problem, I'd be glad to help
debug this.

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