Is it possible to turn on/off Scroll Lock light by software instructions like outb or something else? And if the answer is yes, can we restrict the use of these instructions so that they are only allowed in ring-0?
+1
A:
question part one (is it possible?): ledd
ledd is part of the ledcontrol package, which allows you to show arbitrary information on the normally-unused keyboard LEDs. It is fully scriptable, so you can show any TRUE/FALSE condition accessible or indicate an arbitrary value. It supports blinking LEDs with priority levels and animations. The LEDs not used by ledd should function as normal.
The MYYN
2009-12-14 03:07:30
Thanks for the link. But this program uses tty device file to set the LED light, and I'd like to know how the kernel deal with it. :P
ZelluX
2009-12-14 03:23:09