I have been experiencing for the last few weeks, complete system freezes
at random times, on an up-to date GUTSY system.

Trying the engadget site, I have had a lockup after roughly a minute. This 
seems to be firefox/gecko related, as I can confirm that these hangs always 
occur when firefox is running.
However, FF does not need to be in the foreground for this to happen. I have 
had freezes/hangs when doing the following:
- scrolling a page using either a mouse wheel, the scrollbars & clicks, or my 
touchpad (this is a laptop)
- Opening a Firefox menu
- Having the mouse move over a background firefox window.

In all cases, the keyboard is totally unresponsive, even the laptop-specific 
Fn+ keys do not respond. ssh sessions are locked, new ssh connections cannot 
happen, and the box does not respond to a ping.
I have reprodiced this on both a wired/wireless network connection, 
with&without compiz enabled (only "normal" effects).

Unfortunately, there is no kernel stack trace whatsoever, or any trace
of an error in any log file.

-- 
System freezes (possibly Gecko)
https://bugs.launchpad.net/bugs/107093
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Bugs, which is the bug contact for Ubuntu.

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