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** Changed in: thunderbird
       Status: Confirmed => Expired

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https://bugs.launchpad.net/bugs/38054

Title:
  message list slow scrolling

Status in Mozilla Thunderbird:
  Expired
Status in thunderbird package in Ubuntu:
  Triaged

Bug description:
  Hi!

  I'm on kubuntu dapper and using thunderbird as mail program.

  When scrolling the message list of a folder, I have redraw rates of about 5 to 10 redraws per second. In other words: The list scrolls very slow and is very unresponsive.
  CPU goes up to 100% while scrolling.

  I tested this with a empty profile just filled with about 100 mails in
  the local inbox. No extensions, no themes, no IMAP connections, no
  nothing.

  I tested this with vanilla thunderbird downloaded from mozilla.org,
  too and there the problem shows up, too. So it might be related to
  something else I don't see yet.

  I changed my GTK theme to default instead of gtk-qt. Looks ugly, but
  problem still persists.

  Interestingly when scrolling the message preview pane or an opened
  message, scrolling is smooth, fast and very responsive. So graphic and
  rendering subsystems cannot be involved into the source of the problem
  I think.

  Before testing dapper I used thunderbird on SuSE 9.1 and there were no
  problems scrolling in message lists up to 20.000 mails. So it should
  be able to do that fine on dapper, too. My hardware is absolutely
  sufficient (Athlon XP 2800+, Geforce 6600 GT, nvidia closed source
  driver configured correctly)

  Any ideas?

  Best,
  Daniel

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