[Nouveau] [Bug 89730] NV50: LightDM GTK+ Greeter Background - inconsistent display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89730

--- Comment #13 from Ilia Mirkin <imirkin at alum.mit.edu> ---
poma, not sure what your skillset is... If you're comfortable modifying code,
you could start hacking away at xf86-video-nouveau.

Take a look at src/nv50_exa.c -- there are a bunch of functions like
NV50EXAPrepare*. In each of them, Just put as the first line (after variable
decls) something like

NOUVEAU_FALLBACK("poma\n");

If you do it in all the prepare functions, I bet that the background will start
to work. (And you will basically have no accel.). Figure out which operation is
the one that causes all the trouble (by starting to remove the fallbacks). Once
you figure out which high-level op it is, I can provide further instructions to
narrow down the specific operation further.

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