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

[Swâmi Petaramesh]

@Bartek: « the MTRR fix is (AFAIK) to improve EXA performance ... and
you were clearly running UXA as per the log you posted. »

I don't have a clue about what EXA or UXA are, I'm no graphics drivers
expert ;-) I only know that UXA seemed disabled (per Xorg.log) before I
applied the suggestions from
http://ubuntuforums.org/showthread.php?t=1130582 that enabled it.

But I'm completely clueless about which should provide best performance.

As for MTRRs, the said Howto suggests to run fixmtrr.sh "each time X is
restarted" but it doesn't state if it should be run before or after
starting X, not what would be the best place to place a call for it. So
I haven't used it at all so far... Looks stupid ;-))

@Zack Evans: « are you now getting "(EE) intel(0): underrun on pipe A!"
messages in the log? »

No, I haven't seen any such message in X log (nor in .xsession-errors or
syslog, I was unsure where to look for it, but it isn't in any of these
logs or past logs).

> « if performance in your favourite game has dropped by half that's
more meaningful that GLXgears dropping by half. »

Well, I'm no big gamer and play no game at all nor use graphics-
intensive apps on this precise machine very often, so I have no
"measuring" tool besides glxgears.

I'm actually more concerned by having my KMail toolbar corrupt or tray
icons acting up, and I'd rather have a nice desktop with smooth
behaviour rather than doing any FPS competition.

I'm also used (it was already the case in Intrepid) to see KDE 4.2
frequently spit messages at me stating « Compositing was too slow and
has been disabled. If this was only temporary press [Alt]-[Shift]-[F12]
to re-enable it » or some message close to this one.

This most of the times occurs when reordering Firefox tabs with the
mouse where I would expect this to be no big deal graphically speaking.
It also may occur when the sytem is under heavy CPU load and I shift
desktops or open/close/move windows. But this is not really relevant to
Jaunty as it already did that in Intrepid.

-- 
[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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