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0e1f616
(Get the code!)
I did the on-line upgrade from Feisty to a Gutsy beta on an IBM T30 Laptop that I only use for web browsing. It displayed this problem straight away, very high CPU utilisation.
The resource tab of the System Monitor program charts CPU utilisation and made it obvious that CPU was being wasted somewhere but the process tab did not give any clue where. None of the displayed processes showed a high utilisation. COULD THIS BE ANOTHER BUG ?
I needed to use the "top" command to find the culprit udevd using 87% CPU.
The problem went away after doing:
sudo aptitude remove evms
and re-booting the PC.
Like Pat above, I have never heard of EVMS before so I assume it is a standard part of Gutsy. Having read the evms web site I am a little concerned that I no longer have it and I certainly have no plans to do the same upgrade on my desk top machine until I read encouraging noises about this bug.