Regression: 2:2.2.0.90-2ubuntu7 from 2:2.2.0.90-2ubuntu6: Slow scrolling

Bug #194571 reported by Matthew Wardrop on 2008-02-22
This bug report is a duplicate of:  Bug #177492: EXA is balls-achingly slow. Edit Remove
2
Affects Status Importance Assigned to Milestone
xserver-xorg-video-intel (Ubuntu)
Undecided
Unassigned

Bug Description

Binary package hint: xserver-xorg-video-intel

The no XAA patch FINALLY fixed slow scrolling issues on my intel graphics card, an intel 945 (I think). Is it really required to remove this patch?

Kind Regards,
Matthew

Ubuntu Release:
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"

I should also add that I mean slow scrolling when compiz is enabled. Metacity composite manager and metacity uncomposited works fine. I should like to be able to use compiz effectively, however.

Kind Regards,
Matthew

Bryce Harrington (bryce) wrote :

I'm not sure I understand your bug report, or exactly which patch you're referring to...

My guess is that you experience performance issues with EXA and when we (briefly) switched back to XAA for <965 you saw a performance increase? If this is the case, then I think I may have a better fix I can apply... let me know.

Also, please attach your /var/log/Xorg.0.log and /etc/X11/xorg files.

Changed in xserver-xorg-video-intel:
status: New → Incomplete

My apologies for such a vague bug report - Having woken up late, I imagine I am just being lethargic and lazy.

I do not know TOO much of what happens behind the scenes in terms of graphics drivers, and so when I noticed in the package changelogs that the XAA-patch (which sets XAA to be used by default, instead of EXA), I instantly assumed this was the "breakpoint". I think that is fairly safe.

I will upload forthwith the xorg.conf file from /etc/X11/xorg.conf, and a log file using the ubuntu6 release, and then the ubuntu7, and probably, since I think it is more useful than the previous two, a diff of the two files, with ubuntu6 as the reference.

Kind Regards,
Matthew

The slow scrolling almost looks like a fps limiter, but I cannot see that as being the issue, for compiz works smoothly in all but the scrolling (in ANY window, although particularly where text is being rendered). The XAA version does not seem to exibit this problem.

Hope this has been a little more helpful,
Matthew

Changed in xserver-xorg-video-intel:
status: Incomplete → New
Bryce Harrington (bryce) wrote :
Changed in xserver-xorg-video-intel:
status: New → Incomplete
unggnu (unggnu) wrote :

Isn't this a duplicate of Bug #177492?

This latest version did not seem to fix the probem, unfortunately. I have attached the Xorg.0.log file again. Thank you for working on a fix to this problem!

Kind Regards,
Matthew

Adding Option "MigrationHeuristic" "greedy" to the xorg.conf file, as suggested in Bug #177492 works, but it seems like a hacky work around. If you want me to test any other package, I will remove that workaround before testing.

Kind Regards,
Matthew

Changed in xserver-xorg-video-intel:
status: Incomplete → New
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