2D graphics slowdown with -686 kernels

[Michael V. De Palatis]

I couldn't find a bug listed in Launchpad, so I just submitted one:

https://launchpad.net/distros/ubuntu/+source/linux-source-2.6.15/+bug/53757

Mike

On Sat, Jul 22, 2006 at 01:30:45PM -0500, Michael V. De Palatis wrote:
> Hi all,
> 
> I recently noticed that the 2D graphics performance on my
> Centrino-based laptop were lagging (coincidentally, the fglrx-enabled
> 3D accelerated graphics had no issues whatsoever), in addition to high
> idle CPU usage. For example, the fading in xscreensaver took an
> incredibly long time compared to how long it should take, and the
> default firefox "busy" icon (the thing in the upper right, or in the
> tabs in place of a page's icon when a page is loading) would animate
> in a noticeably choppy fashion.
> 
> Anyway, I found a forum post about this same issue (link at the
> bottom), in which the OP found that when using the -386 kernel
> instead, the issue was solved. I tried this out, and sure enough, it
> worked (additionally, I noticed the boot time was much faster, too).
> 
> I don't recall this being an issue long ago when I practically
> immediately switched from -386 to -686 (originally with Hoary), and
> unfortunately, I don't know when exactly this started. That said, does
> anyone have any idea as to what this bug is related to?
> 
> I am currently looking through the buglist on launchpad to see if this
> has already been filed, and if not, I will submit one. I just wanted
> to see if anyone here had any clues to point me in the right direction
> of the problem.
> 
> Thanks,
> 
> Mike
> 
> 
> (Forum link)
> http://ubuntuforums.org/showthread.php?t=205690&highlight=xscreensaver+slow
> 
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