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Re: grub with serial line configuration using PCI serial adapter

From: Songatov Rishat
Subject: Re: grub with serial line configuration using PCI serial adapter
Date: Mon, 17 Oct 2016 22:22:15 +0300
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Hi thank you for helping me!

Unfortunately I haven't got serial access to the grub after adding this piece of configuration:

insmod pci
insmod serial
insmod terminal
insmod terminfo

###serial --speed=115200 --port=a880 --word=8 --parity=no --stop=1
serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1

terminal_input serial
terminal_output serial

May be I need some sleep time after inserting pci.mod. How I can do this?


Best regards


On 17.10.2016 20:34, Andrei Borzenkov wrote:
17.10.2016 19:41, rishat пишет:
On 2016-10-17 19:16, Andrei Borzenkov wrote:
17.10.2016 16:16, rishat пишет:
setserial -g /dev/ttyS[0-4]
/dev/ttyS0, UART: 16550A, Port: 0xa880, IRQ: 21
When I tried to manually type a "serial --speed=115200 --unit=0 --word=8
--parity=no --stop=1" in the grub command line it complains that COM1
port don't exist. I have played with unit and port attributes but
without any luck.

Does "serial --port=a880 ..." work? If not, what exactly happens?

Note that you may need to load at least PCI bus driver (insmod pci) for
this to work.
I've tried to use it that way but it didn't find com port again.
I'll try to do insmod pci and write to you tomorrow.

Yes, please let us know, but on firther consideration it probably won't
help either. Card likely needs to be initialized first, and this
requires driver that knows how to do it. serial driver in GRUB presumes
hardware is in working state already. Someone would need to implement it.

By the way is it possible to share documentation about some useful
modules in the grub? I havn't found any information using google.

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