Re: usb_keyboard not available as a terminal input?

[Andrei Borzenkov]

21.05.2017 18:18, Tom Yan пишет:
> Hi all.
> 
> So I happened to have looked into terminal_input for a bit (that is, 
> "console", the default, has always worked for me so far. I just look into it 
> because of curiosity and possible future use case). I notice that there 
> should be a "usb_keyboard", as documented here: 
> https://www.gnu.org/software/grub/manual/html_node/Simple-configuration.html
> 
> However, when I run `terminal_input` in the grub shell, I see this:
> 
> Active input terminals:
> console
> Available input terminals:
> serial_* serial at_keyboard
> 
> And usb_keyboard is missing.
> 
> I tried `insmod usb_keyboard` and `terminal_input` again; while `lsmod` lists 
> usb_keyboard, terminal_input still doesn't list it as an available input 
> terminal.

This means usb_keyboard did not detect keyboard. You need to load
suitable HCI drivers as well (ohci, ehci, uhci) - otherwise usb_keyboard
has no way to communicate with device.