[Wayland-bugs] [Bug 93451] weston 1.9 do not start with drm-backend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93451

--- Comment #6 from Pekka Paalanen <ppaalanen at gmail.com> ---
(In reply to fausto from comment #5)
> 
> 00:01.0 PCI bridge: Intel Corporation 82865G/PE/P AGP Bridge (rev 02)
> 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
> R200 [
> Radeon 9100]

A quick glance in wikipedia says R200 is OpenGL 1.3 capable. That's very far
from GL ES 2, and I think it is a completely fixed-function card (no shaders).
Therefore Weston's gl-renderer cannot run on it, and you will be better off
with Pixman-renderer.

This also puts it in the Mesa classic driver set, not Gallium3D.

> Result of debug:
> 
> libGL search for .drirc in $HOME not in /etc. I copied /etc/drirc in
> /root/.drirc.

drirc is irrelevant, unless it contains directives that break your setup. It
does not have to exist by default.

> libEGL debug: added egl_dri2 to module array
> libEGL debug: the best driver is DRI2
> libEGL debug: the value (0x9) of attribute 0x3040 di not meet the criteria
> (0x4)

Hmm, I was expecting more output, like which .so it will load. That's kind of
crucial.

/usr/include/EGL/egl.h:#define EGL_RENDERABLE_TYPE               0x3040

#define EGL_OPENGL_ES2_BIT                0x0004

Bit 0x4 is not in 0x9, so that means GL ES 2 is not supported here, but see
below.

> I don't know what this means.
> 
> In /usr/lib/xorg/dri there are:
> i915_dri.so        nouveau_dri.so        r300_dri.so    radeonsi_dri.so
> i965_dri.so        nouveau_vieux_dri.so  r600_dri.so    swrast_dri.so
> kms_swrast_dri.so  r200_dri.so           radeon_dri.so  vmwgfx_dri.so
> 
> In /usr/lib/xorg/driver there are:
> ati_drv.so  radeon_drv.so
> 
> In /usr/lib/mesa there are:
> libEGL.so        libGL.so        libGLESv1_CM.so        libGLESv2.so
> libEGL.so.1      libGL.so.1      libGLESv1_CM.so.1      libGLESv2.so.2
> libEGL.so.1.0.0  libGL.so.1.2.0  libGLESv1_CM.so.1.1.0  libGLESv2.so.2.0.0

The file lists look ok from what I can tell.

> Where I can found the module egl_dri2?

It is a built-in, you already saw it loaded correctly.

> Aniway weston --backend=drm-backend.so --use-pixman work perfectly.
> 
> PS:
> result of glxinfo | grep render
> libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/tls/swrast_dri.so
> libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/swrast_dri.so
> direct rendering: Yes
>     GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
>     GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
> Extended renderer info (GLX_MESA_query_renderer):
> OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.7, 128 bits)
>     GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
>     GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_packed_depth_stencil, 
>     GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
>     GL_NV_blend_square, GL_NV_conditional_render, GL_NV_depth_clamp, 
>     GL_OES_fbo_render_mipmap, GL_OES_get_program_binary, GL_OES_mapbuffer,

llvmpipe is a software renderer, not a GPU driver. Either your GPU is too old
to be useful and you or someone chose software rendering, or even your Xorg
driver setup is broken.

---

In summary, Weston's gl-renderer is not written for this old hardware and you
have to --use-pixman. The only thing left in this bug is to check if we can be
more clear with the error message in Weston.


PS. Never do 'grep' on a log or a program output unless asked to, otherwise you
likely miss useful information.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/wayland-bugs/attachments/20151221/910738e2/attachment.html>