[Nouveau] [Bug 99400] [nouveau] garbled rendering with glamor on G71

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99400

--- Comment #15 from Olivier Fourdan <fourdan at xfce.org> ---
(In reply to Ilia Mirkin from comment #13)
> I'd like to help you, but I'm just not sure how

I know, and very much appreciate your help!

I'm sorry I can't be of more help, I spent like the past 5 days or so on this
and all I could come up with is pretty much summarized in comment 12, ie not
much.

> [...] I've never seen that before. But they don't create contexts.
> Compare your Xephyr trace, which has glXChooseFBConfig, glXCreateContext,
> glXMakeCurrent

I think this is normal, this is Wayland not X so it doesn't need/use GLX.

Xwayland is an X server for the X11 clients and a Wayland client to the Wayland
compositor, so that X11 application can still work on Wayland.

> While the Xwayland trace has none of those. Paradoxically, it starts at call
> 31. Perhaps you have a non-egl-enabled apitrace? Also note that there's not
> a single instance of UseProgram or any other shader-related items in the
> XWayland trace.

Yes, that's puzzling... I rebuilt apitrace current from github (instead of
using the one from Fedora) and it's the same.

> Does the Xephyr trace exhibit the problems for you when replayed? If so, I
> can investigate that. However on my GK208 (or with llvmpipe), when replayed,
> it doesn't appear to render anything.

Unfortunately I could never make apitrace replay anything here either.

(In reply to Ilia Mirkin from comment #14)
> nv30_vbo_validate - force it to take the vertex->need_conversion path (like
> we do on BE). No clue if that'll help, but it's a start.
> 
> Also did you check whether NV30_SWTNL=1 fixes things?

Neither forcing conversion in nv30_vbo_validate() nor using NV30_SWTNL=1 change
anything.

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