How to tell which process is hogging my CPU when they don't add up to 100%?

How to tell which process is hogging my CPU when they don't add up to 100%?

Ubuntu's System Monitor applet shows 100% CPU usage continuously. If I click it, the resources tab shows it at 100% continuously, too. If I go to processes, though, to find out which process is the culprit, there is nothing above 10%. If I run top there is nothing above 10%. The individual processes do not add up to 100%. I try killing lots of processes, but the overall usage continues to be 100%. How can I find out what's hogging the CPU?

Asked by: Guest | Views: 305

Total answers/comments: 2

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Guest [Entry]

"I have the same problem, but found out that Xorg was using 50% of the CPU while this showed out that it [this bug] could be fixed with the command sudo rmmod ums_realtek.
This time Xorg only used about 5-10% CPU in the system monitor, but in the resources tab it still showed 100%.

While I was monitoring the system monitor, I saw a blink of a root proses using 100% CPU! I didn't have time to see what it was, but I am sure this has something to do with it."

Yjgfim [Entry]

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