[Nouveau] [Bug 58556] MacBook Pro 5, 1 with nVidia 9400m and 9600m, scrambled screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58556

--- Comment #21 from Pierre Moreau <pierre.morrow at free.fr> ---
Necessary part from nouveau_channel_new to get a clean screan are:
- nouveau_channel_ind
- nouveau_channel_init, but only the beginning:
  - vram creation
  - gart creation
  - dma variables initialisation

There are some MEM_CACHE errors, but at least it boosts and screen is clean.

I found out that nouveau_abi16_ioctl_channel_alloc was also calling
nouveau_channel_new, but with other arguments for vram and gart, and it is
called whether or not acceleration is enabled.
Is there a specific reason to call at first nouveau_channel_new only when
acceleration is enabled, and later on when starting the GUI, to always call it?

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