Re: grub with serial line configuration using PCI serial adapter

[Andrei Borzenkov]

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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>