Re: Can grub be made to talk?
On 7/23/2019 6:59 PM, Martin McCormick wrote:
> I confess that I am on the low end of the grub learning
> curve but I need to make one debian system duel-boot with a
> different debian version. One version is debian wheezy which I
> want to keep because there are some PIC microcontroller
> development tools that make just fine in wheezy but the make
> process blows sky high with stretch or buster so the answer is to
> make a wheezy partition and a newest such as buster partition and
> select one of these two at boot time.
>
> I absolutely hate what I call "press and pray" in which
> the silent world prevails and you count button presses in the
> silence and hope and pray that nothing weird happens.
>
> Failing speech, I know grub can be configured to work
> through a serial port if one exists at the time grub is needed.
>
> Is there a good document anywhere dealing with all these
> issues?
>
> This very Summer marks 30 years that I have been working
> with unix-like systems so like lots of skill-based systems, I am
> familiar with the feel of unix but grub has always been that
> mystery thing that you automatically say yes to when installing
> debian or freebsd. Now, I want to hopefully do something useful
> with it. The less extra hardware needed to read grub's output,
> the better off we are and I am aware that very little resources
> are operational when grub is working.
>
> Thanks
>
According to (1) you are out of luck.
To be able to fully controle the boot sequence I would install eatch
distro in a VM.
Granted, you would still have the issue of not being able to access grub
on where the VM are installed but that would eliminate playing with grub
"blindly".
See (2) for serial console.
1) https://lwn.net/Articles/302159/
2)
https://www.tldp.org/HOWTO/Remote-Serial-Console-HOWTO/configure-boot-loader-grub.html
--
John Doe
Reply to: