Bug 22531

Summary: slow 2d with certian webpages with firefox
Product: xorg Reporter: Bret Towe <magnade>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Xorg.0.log none

Description Bret Towe 2009-06-29 08:52:47 UTC 
Created attachment 27222 [details]
Xorg.0.log

on an older emachine laptop with a radeon igp card
xorg log says its "Chipset: "ATI Radeon IGP320M (U1) 4336" (ChipID = 0x4336)"
i see massive cpu usage and really slow scrolling on a few webpages
the common item seems to be a static item and other bits moving behind it

most recent webpage that does it is this:
http://marswatch.astro.cornell.edu/pancam_instrument/projects_2.html

first i noticed it on was:
http://www.cdjapan.co.jp/

the second url however seems to not be as bad any more
not sure if they changed something or one of the updates into -git fixed it

running ubuntu 9.04 with the xorg on the edge ppa which gives me
near latest -git of radeon driver

attached is xorg log if required
Comment 1 Alex Deucher 2009-06-29 08:58:10 UTC 
Please attach your xorg log and config.
Comment 2 Alex Deucher 2009-06-29 08:58:44 UTC 
Please attach your xorg log and config.(In reply to comment #1)
> Please attach your xorg log and config.
> 

nevermind, I missed it before.
Comment 3 Alex Deucher 2009-06-29 09:02:12 UTC 
This might be a dup of bug 21683.  does:
Option "AccelMethod" "XAA"
help?
Comment 4 Bret Towe 2009-06-29 09:24:01 UTC 
it does help
but I thought xaa was being phased out hence the report
Comment 5 Bret Towe 2009-06-29 09:44:40 UTC 
also with exa still enabled i played with fbtexpercent
and looking at man page it sounds like near 0 should help exa
but i found it seems to act better with settings near 100

is the man page documentation backwards or is that a bug?
Comment 6 Alex Deucher 2009-06-29 09:46:07 UTC 
(In reply to comment #4)
> it does help
> but I thought xaa was being phased out hence the report
> 

It is, but EXA does not perform well in some cases where vram is limited due to the lack of a proper memory manager.  This should be rectified with the new drm memory manager work that is currently in progress.  In the interim, there are cases where XAA is still useful.

*** This bug has been marked as a duplicate of bug 21683 ***

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