Problems with ati driver on Tibook

Alex Deucher alexdeucher at
Mon Jan 4 10:17:32 PST 2010

2010/1/4 John R. Dunning <jrd at>:
>    From: Alex Deucher <alexdeucher at>
>    Date: Mon, 4 Jan 2010 11:11:08 -0500
>    I'm not sure if this sequence will cause any problems on PC laptops or
>    not, I suppose it depends on the oem, so I've made the patch
>    mac-specific for now.  If the attached patch works for you, I'll go
>    ahead and commit it.
> It seems to work so far.  I still have other issues with this machine,
> but with one exception, I don't think they're due to this driver.
> FWIW, the code I altered is a fairly direct crib from the radeon_fb
> driver in the kernel.  See, for instance,
> linux-2.6.31/src/drivers/video/aty.c, circa line 1020.  That's pretty
> clearly doing the same sort of thing I patched in the xf86-video-ati
> driver, even has similar comments about asic bugs.  That code is not
> conditional.

Right, but the current code in the xorg driver has been there for
years and works as well for most systems, so I don't want to break
anything.  Most of the code in radeonfb came from xf86-video-ati

> If you want to commit it, that's probably a step to the good.  I have
> one other wacky thing that happens to the screen "every once in a
> while", if I track that down and it turns out to be in this driver,
> I'll send another patch.



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