Thread: High CPU usage but no processes using it?

hi


have installed ubuntu on laptop (toshiba a300d, dual amd turion, 64bit 9.10 ).

after seemingly random period of time cpu usage shoot up, settling between 70 , 100% usage.

weird thing when go of process viewers, nothing using cpu!

in top, highest of processes using 5%

memory useage stays low, no swapping , no hard drive activity.

it's annoying laptop start fine after while cpu usage bug kicks in , slows laptop down. way can stop reboot.

i've looked in system logs , nothing being reported there.


know causing cpu usage sky rocket , how can stop it?

i'm guessing might sort of stuck irqs or other hardware calls, no single process using resource.


suggestions welcomed!

i have been having problem on desktop. have noticed same no processes show high of usage. else when go reboot firefox running , needs force quit. however, program not show running in sys monitor or on desktop. reboot , awhile. gonna try not running firefox , see if starts bogging down.

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