On Thu, Mar 21, 2002 at 10:50:36 -0500, Taybin Rutkin wrote: > On Thu, 21 Mar 2002, Paul Davis wrote: > > > i noticed from luca's initial report on firm timers that switching the > > caps lock LED on and off is a notable source of latency in the > > kernel, on the order of 7msec. > > Seems odd. I would have expected the LED to be handled in the keyboard's > hardware. Maybe only certain models? But I guess it must be universal > since there is software to toggle the LEDs.
Certainly on AT (and I think PS2) keybaords the LED is controlled by the CPU. It was a standard way to find out if the kernel had died. - Steve
