Re: grub with serial line configuration using PCI serial adapter

[rishat]

Hi Andrei
May I ask another question? How I can debug this behaviour? I believe 
that BIOS initializes this adapter. Need to say that "PnP OS" was setted 
to "Yes" value. I've changed it to "No" and ... same silence in the 
minicom. Then I pulled out this adapter and inserted this pci serial 
adapter to the other PC computer. It has already integrated COM port, 
this one is working fine, I have tried to do serial connection via pci 
adapter, but again I've got nothing. I just want to figure out is this 
something I can do with motherboard or my pci adapter is not compatible. 
If I need to change this card do you have list of pci, pci-e card that 
successfully can by used? Is it possible I've faced to situation when 
two motherboards can't initialize this hardware?

Thank you in advance.

--
Best regards
Rishat


On 2016-10-18 06:47, Andrei Borzenkov wrote:
> 17.10.2016 22:22, Songatov Rishat пишет:
> > 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?
>
> You can pause with "sleep NN" but as I already wrote this is not likely
> to work anyway - either GRUB needs code to initialize your PCI card or
> BIOS should do it. Try BIOS settings, in the past it was common to have
> something like "PnP OS" where "no" would cause BIOS to initialize all
> available hardware and "yes" would leave it to operating system.
>
> > --
> >
> > Best regards
> >
> > Rishat
> >
> >
> > 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.
> > > >
> > > > > _______________________________________________
> > > > > Help-grub mailing list
> > > > > address@hidden
> > > > > https://lists.gnu.org/mailman/listinfo/help-grub