console issue

Thu Jul 28 10:19:18 UTC 2005

> -----Original Message-----
> From: redhat-install-list-bounces at redhat.com
[mailto:redhat-install-list-
> bounces at redhat.com] On Behalf Of Rick Stevens
> Sent: Wednesday, July 27, 2005 8:37 PM
> To: Getting started with Red Hat Linux
> Subject: Re: console issue
> 
> Smith, Albert wrote:
> > Try modifing the grub.conf file and at the end of the kernel line
append
> > with the following information:
> >
> > console=ttyS0 console=tty0
> >
> > This should help you as long as your console are at 0
> 
> Albert, we prefer bottom-posting on this list.
> 
> Don't forget to give the serial port settings you want as well,
> 
> 	console=ttyS0,9600n8 console=tty0
> 
> The serial port stuff is "portname,BBBBPN", where "BBBB" is the
> baud rate, P is the parity (e, o, n) and N is the number of bits
> to use.  "9600n8" is 9600 baud, 8 data bits, no parity (and is the
> default).  "115200e7" is 115,200 baud, 7 data bits, even parity.
> 
> >>-----Original Message-----
> >>From: redhat-install-list-bounces at redhat.com
> >>[mailto:redhat-install-list-bounces at redhat.com] On Behalf Of
> >>Cindy H. Wang
> >>Sent: Tuesday, July 26, 2005 4:01 PM
> >>To: Getting started with Red Hat Linux
> >>Subject: Re: console issue
> >>
> >>--- karlp at ourldsfamily.com wrote:
> >>
> >>
> >>>>Hi all,
> >>>>
> >>>>I am having issues with my serial console.  The
> >>>
> >>>system
> >>>
> >>>>is a Rackable running Phoenix BIOS.  Console
> >>>>redirection is set in the BIOS settings.   All
> >>>>required elements are also configured in
> >>>
> >>>grub.conf.
> >>>
> >>>>When system powered on, I can see the POST and all
> >>>
> >>>the
> >>>
> >>>>way until grub menu.  After I selected the kernel
> >>>
> >>>I
> >>>
> >>>>wish to boot, nothing shows up on the console, not even a login
> >>>>prompt.  Can there be any incompatibilities between the
> >>
> >>BIOS and the
> >>
> >>>>OS.
> >>>>Because if I moved the hard disk to another
> >>>
> >>>Rackable
> >>>
> >>>>not using Phoenix BIOS, serial console works fine.
> >>>>
> >>>>Does anyone has any other ideas?
> >>>
> >>>You didn't mention if the non-Phoenix BIOS system(s) have a BIOS
> >>>setting to redirect the console. If not, then I would recommend
> >>>turning that feature off in the Phoenix BIOS as well, then see...
> >>>
> >>>Karl
> >>>
> >>
> >>Karl,
> >>
> >>Thank you very much for the reply.  The non-Phoenix BIOS have
> >>BIOS setting to redirect the console and we have tried both
> >>to turn on and off the feature in
> >>Phoenix BIOS.   Unfortunately, that does seen to help
> >>at all.
> >>
> >>Thanks.
> >>Cindy
> >>
> >>
> >>>>Thanks in advance.
> >>>>
> >>>>Cindy
> >>>>
> >>>>_______________________________________________
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> >>>>
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> 
> --
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> - Life:  That which happens while you search for the remote control. -
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If the kernel serial console works with one BIOS and does not work with
another, then most probably you have the different serial port settings
such as speed and parity in those BIOSes. You can change the kernel
serial port settings to match the settings in the Phoenix BIOS, as Rick
suggested. However, I think that it will be better to change the
settings in Phoenix BIOS to match the settings the kernel expect (most
probably, the settings in the non-Phoenix BIOS match the kernel expected
settings), so you will not need to change kernel settings when move hard
disk from one computer to another. By default the kernel will expect
serial port working in the mode 9600n8.

Alexey Fadyushin
Brainbench MVP for Linux
http://www.brainbench.com