Dell SK-8135 keyboard not working during boot (POST, BIOS, GRUB) on OptiPlex 990
Note
Update: Since this was written, Dell has released version A10 of their OptiPlex 990 BIOS! I’ve tested this on my 990 and my keyboard now works!
Just a quick note to anyone out there confused out of their mind if their Dell keyboard isn’t working with their computer during boot: there is some incompatibility between the OptiPlex 990 and the Dell SK-8135 keyboard. I’m using the A06 BIOS, which is latest at the time of writing.
The result of this is that you cannot use the keyboard during boot, so not within POST, not to …