[Bug 605567] [NEW] Extremely slow painting of launchpad.net bug details page with nvidia driver

[Captain Chaos]

Public bug reported:

Binary package hint: firefox

Launchpad.net bug detail pages are painted extremely slowly by Firefox
on my machine. I'm running Ubuntu Lucid 64-bit, and I have the
proprietary nvidia driver (from the Ubuntu repositories) installed,
version "current". The machine has two 8800 GTX GPU's with 768 MB each,
so the available graphics power should not be a problem.

It takes many seconds (sometimes tens of seconds) to draw the page,
during which the entire computer slows to a crawl. Nothing happens on
the screen during this time. Whenever I scroll the page up so that more
of the page is revealed at the top of the screen, this is painted
extremely slowly as well. Scrolling down (once the page is fully
painted) does not produce slow-downs, so the problem appears to be with
the content at the top of the page.

It appears to be an interaction between Firefox, Launchpad.net and the
proprietary NVidia driver. I don't notice slowdowns like this on any
other web page (including other launchpad.net pages). Other browsers,
such as Chrome, draw Launchpad bug detail pages with lighting speed. And
when I use the nv or nouveau drivers the problem does not appear either.

Since Chrome can paint the pages at fast speeds, Firefox should be able
to as well, so I still think this is a Firefox problem.

If there is any way I can determine exactly what it is that is taking so
much time and slowing down the entire computer, please let me know! Or
if there is any other way in which I can help debug this problem.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: firefox 3.6.6+nobinonly-0ubuntu0.10.04.1
ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-23-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Jul 14 21:03:25 2010
FirefoxPackages:
 firefox 3.6.6+nobinonly-0ubuntu0.10.04.1
 firefox-gnome-support 3.6.6+nobinonly-0ubuntu0.10.04.1
 firefox-branding 3.6.6+nobinonly-0ubuntu0.10.04.1
 abroswer N/A
 abrowser-branding N/A
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
SourcePackage: firefox

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

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Extremely slow painting of launchpad.net bug details page with nvidia driver
https://bugs.launchpad.net/bugs/605567
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