[Intel-gfx] Xorg "intel" driver uses DRI2 by default instead of DRI3 ?

[bubbleguuum]

Hi list,

driver version used: 2.99.917+git8674.25c9a2fcc-2.1
Xorg: 1.20.4


Is there a reason why the "intel" Xorg driver uses DRI2
by default instead of DRI3 ? If you want DRI3 you need to use
Option "DRI" "3".

Using DRI2 cause problems with compositors such as compton, in partocular
is causes scrolling in Firefox to stutter badly. Switching to DRI3 fixes 
the problem.

See the end of this compton issue for the discussion that led to finding 
this:

https://github.com/yshui/compton/issues/132

So shouldn't DRI3 be the default (it's the default when using the 
modesetting driver).

///

That's unrelated, but "man intel" mentions that the TearFree option is 
disabled by default while
I observed it was enabled by default on my system.


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