Re: [Xen-users] Serial Console oddity

["Gino LV. Ledesma" <gledesma@xxxxxxxxx>]

Thanks a lot, Derrik

I left xencons0 after scouring the net for sample config files. Also,
I tried setting console=tty0,ttyS0 once before and that didn't work
either.

Anyhow, I rebuilt the kernel without the 8250 serial driver, corrected
the grub config (put console=tty0 then console=ttyS0) and rebooted.
Everything's working fine now.

Many thanks once again!

gino ledesma


On 8/16/05, Derrik Pates <demon@xxxxxxxxxxxxx> wrote:
> Gino LV. Ledesma wrote:
> > Has anyone encountered a situation where the boot output stops after
> > switchroot is made? What happens in my instal is that xen's serial
> > console output stops at the moment the WARNING message about tls is
> > made, and the very last message on screen/serial console is
> > "Continuing...." The computer proceeds to boot, though nothing is
> > shown on the console. So I don't get to access the xen host over
> > serial console.
> 
> >     module /vmlinuz-2.6.11.12-xen0 ro root=/dev/VolGroup01/LogVolRoot
> > nousb console=xencons0 console=tty0
> 
> This might have something to do with it. It's not "xencons0", XenoLinux
> sees it as ttyS0. Also, if you want the output of init to go to ttyS0
> (so your initscripts' startup messages show up there), specify it
> second, not first.
> 
> > 8250 Serial Driver compiled in.
> 
> The Xen hyperkernel has to take possession of the serial port, so
> building in the 8250/16550 serial driver will break things. You
> shouldn't enable it.
> 
> > When adding console=ttyS0, the message indicating press CTRL-a three
> > times appears and boot stops there. Pressing CTRl-a 3x does nothing.
> 
> Yeah, not surprising. I'm rather surprised it doesn't blow up all the
> time, actually, and worse than that.
> 
> > If it helps, this message appears during the kernel boot:
> >
> > WARNING: failed to register Xen virtual console driver as 'ttyS0'
> 
> Yep. Not surprising at all.
> 
> --
> Derrik Pates
> demon@xxxxxxxxxxxxx
>

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