At 8:33 AM -0400 8/20/06, Tom Horsley wrote: >On Sun, 2006-08-20 at 10:23 +0200, Trond Danielsen wrote: >> On 8/20/06, Tom Horsley <tomhorsley@xxxxxxxxxxxx> wrote: >> > >> > So I find an option in my BIOS that says enable USB keyboard >> > support, turn it on, and grub works perfectly, but now linux >> > doesn't see the keyboard. >> > >> What does lsusb say if you boot the computer with "USB keyboard >> enabled" in the BIOS? Is it any different than if you boot it with >> "usb keyboard disabled"? > >Looks like it isn't a consistent problem. If I go through >a USB hub, sometimes it sees the keyboard sometimes >it doesn't (same for mouse apparently). If I plug them >directly into one of the usb ports on the motherboard, >it always works fine (sigh... why does all this plug & >play "it just works" stuff never work? :-). > >The motherboard BIOS never seems to have a problem seeing the >keyboard via the hub so something about the linux usb >bootstrapping must have some kind of timing problem. >Grrr.... Is it a Hi-speed (2.0) or a full-speed (1.1) hub? Hi-speed hubs are fancy beasts that do protocol translation to 1.1 as needed. Note that keyboards and mice are Low-speed (USB 1.1) devices, which USB 2.0 Hi-speed hubs emulate as 2.0 devices. Your computer has a hub (or two) built-in, but an external USB 2.0 hub must do the same emulation, and pass it over the wire. It should help to avoid mixing Hi-speed and full- or Low-speed devices on a single hub, which can also improve the throughput of the Hi-speed devices. ____________________________________________________________________ TonyN.:' <mailto:tonynelson@xxxxxxxxxxxxxxxxx> ' <http://www.georgeanelson.com/>
