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Re: What does GRUB2 do when there's nothing to do?

From: Andrei Borzenkov
Subject: Re: What does GRUB2 do when there's nothing to do?
Date: Sun, 28 Nov 2021 18:48:57 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0

On 28.11.2021 12:56, Philip Rowlands wrote:
> When testing with many different kernels installed, I often interrupt the 
> menu timeout then make a cup of tea, or become otherwise distracted.
> When this happens, GRUB2 is waiting for keyboard input but also appears to be 
> consuming power, judging by the way the fans speed up. (Optiplex 7090, if it 
> makes a difference.)
> Is there any config around polling / power saving, or any interactive 
> commands which would show relevant settings? In Linux I'd be looking at 
> P-states and C-states, but options are limited from the bootloader.

grub busy loops waiting for keyboard input, so there is not much that can be 
done here.

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