[Bug 342923] Re: [i945] (Needs UXA) Kubuntu Jaunty Intel 945 GM - Poor sluggish graphics performance in Kate text, etc.

[Zack Evans]

@Bryce, there are lots of bugs described in the conversation above so
far, as follows... so it's a duplicate of several. :)

Musthafa says later on that KDE and Gnome are both affected, so I am
inclined to agree that it's not Kubuntu specific, and the UXA
hangs/freezes described are part of the wider UXA issue(s).

@Musthafa: 
GLXgears is not a benchmark and is misleading in this case for a number of reasons. What sort of framerates do you get in PPracer? But you're right, there are some performance regressions in UXA which we need to get to the bottom of.

@Musthafa,Xavier,Alvin,noisymime,Gnorou,Ace Suares regarding EXA: 
You've all said that EXA is too sluggish. The only way it is acceptable for me is if I have put in the "Greedy" fix and ensured that MTRR is set up correctly - have you all done both of those things, because I now find EXA + Greedy + working MTRR acceptable and I get a smoothish 19FPS in ppracer.

If any of you have display corruption under EXA there's probably already
a bug open for that regression.

The MTRR stuff is explained in 
http://ubuntuforums.org/showthread.php?t=1130582

@Andrew Mason, the difference could be MTRR usage - if you have Jaunty
and Fedora on the same box could you post the output of "cat /proc/mtrr"
on both OSes - could be that Fedora is getting it right by default,
whereas the release version of Jaunty's kernel doesn't for me.

@Bartek,
That might be G35 specific - have you had a look on here for other G35 bugs?

@Wesley, there's a really good explanation of XAA, EXA, and UXA:
http://keithp.com/blogs/Sharpening_the_Intel_Driver_Focus. 
XAA doesn't support hardware 3D fully so Mandriva will need to update to at least EXA.

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[i945] (Needs UXA) Kubuntu Jaunty Intel 945 GM - Poor sluggish graphics performance in Kate text, etc.
https://bugs.launchpad.net/bugs/342923
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