[Intel-gfx] Display at 24bit, but looks like 16.

[Clemens Eisserer]

Hi Jesse,

> This might be a dup of 19784, can you take a look at that bug and possibly
> provide your vbios?
Yes, seems the same bug - screenshots are intact.
Dumped bios is attached.

I also see X-Server crashes when I run two servers and I close the
lid, I already filed that at fedora:
https://bugzilla.redhat.com/show_bug.cgi?id=490197

I also got one sporadic crash, where my screen was flickering with
random contents, but I guess thats hard to debug.
Got some kernel messages about circular locking too, but I don't have
any idea how useful that is.

> Yes, probably.  It may be a known bug but with some more info we can figure
> that out.
In general, it seems the intel driver has a high constant overhead for
operations  moving data from RAM->VRAM.
E.g. XPutImage to an 8-mask pixmap with a following composite
operation using that mask:

With 2.5 + EXA:
14713.862559 Ops/s; put composition (!); 15x15
8382.755474 Ops/s; put composition (!); 75x75
1482.558140 Ops/s; put composition (!); 250x250

2.6.99 + UXA:
7318.125000 Ops/s; put composition (!); 15x15
4350.678733 Ops/s; put composition (!); 75x75
2094.101124 Ops/s; put composition (!); 250x250


Thanks, Clemens
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