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Re: usb_keyboard not available as a terminal input?

From: Andrei Borzenkov
Subject: Re: usb_keyboard not available as a terminal input?
Date: Sun, 21 May 2017 19:36:52 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1

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: 
> 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.

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