Re: Adjusting basic video driver testcase for UEFI systems

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On Thu, 2013-07-11 at 14:12 -0700, Adam Williamson wrote:

> We probably need to test it more, but the impression I was getting from
> the bug is that we don't necessarily want to simply use 'nomodeset' as
> the 'standard fallback path' for UEFI, that there may be UEFI systems on
> which we might want to do KMS but use a generic driver, for
> instance...is that incorrect?

I guess it depends which part you're trying to fall back from:
accelerated drawing, or any kernel code entirely.  The conservative
thing is saying nomodeset: you get the dumb framebuffer the firmware
hands you and that's it.

If we thought the modesetting part of KMS worked but the accelerated
drawing didn't, then we might want to instead make the X server pick
xorg-x11-drv-modesetting instead of a native driver.  Currently there's
no convenient mechanism for that, but I'm hard pressed to think of a
time when I'd have wanted it.

There are KMS-but-not-accelerated drivers - cirrus, mgag200, ast - and
those do use the -modesetting X driver already; 'fallback' for them
could only possibly mean nomodeset.  So in the interests of symmetry...

- ajax

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