Could Num Lock, Scroll Lock, and Caps Lock interrupts delay USB communication for a period of 7 to 8 milliseconds (or screw up gettimeofday)? I'm timestamping the communication in a isochronous USB driver, and we don't miss a millisecond at all during a day run, but as soon as they type one of these keys, the timestamp says the USB communication is off by 7 to 8 milliseconds. Any help would be appreciated.
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