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I bought a new monitor asus vw266 - when i connect it to my laptop(elitebook 8530w) though hdmi after few minutes of use cpu suddenly jumps to %100 on both cores almost locking the computer rendering it unresponsive..

When I check processes through task manager i do not see any process that is eating up the cpu so I am not able to identify what process is causing this.. But the CPU renains at a constant %100

How do i debug such problem - i could not find much on google..

Note: I had the exact same monitor at a different location connected to this laptop via hdmi without any problems.. I had win 7 32 bit installed at the time though and now i have win 7 64 bit. .not sure if that is making a difference in this particular situation..

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Before the cpu spikes, open Resource Monitor (CPU tab), it may show hidden process that are eating CPU cycles.

EDIT: Once open click the CPU tab, then click the cpu column to sort it by highest cpu usage.

All Programs > Accessories > System Tools > Resource Monitor

. enter image description here

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For spotting the culprit easier, let Resource Monitor sort the table by "CPU" (which is CPU usage). That way, the responsible process will show right on top. – Tobias Plutat Jan 25 '11 at 19:01
@ Tobias, thanks, forgot that step. – Moab Jan 25 '11 at 20:07
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