Re: [Xen-devel] Attempt to load 2.6.31-rc8 under Xen 3.4.1 on top of Ubuntu 9.04 Server ( JF's 2.6.31 loaded as vanilla)

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Sep 11, 2009 at 11:03:38AM -0700, Boris Derzhavets wrote:
> Pasi,
> 
> I've tried :-
> 
> title vmlinuz-2.6.31-rc8 Serial / Ubuntu 9.04 Jaunty (kernel 2.6.31-rc8)
>     kernel  /vmlinuz-2.6.31-rc8  root=/dev/sdc2  ro console=tty0 
> console=ttyS0,9600
>     initrd  /initrd-2.6.31-rc8.img
> 
> and
> 
> title vmlinuz-2.6.31-rc8 Serial / Ubuntu 9.04 Jaunty (kernel 2.6.31-rc8)
>     kernel  /vmlinuz-2.6.31-rc8  root=/dev/sdc2  ro console=tty0 
> console=ttyS0,9600n8
>     initrd  /initrd-2.6.31-rc8.img
> 
> Both options send output to real console and hangs at the point as under 
> Xen.
>

Please post "dmesg | grep ttyS" output from baremetal kernel (non-xen). 

Is the serial port onboard (integrated into the motherboard)? 
or pci addon card? 

-- Pasi

> Boris.
> P.S  Null modem connection is OK . I verified for Xen Serial Grub Entry.
> 
> 
> --- On Fri, 9/11/09, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> 
> From: Pasi Kärkkäinen <pasik@xxxxxx>
> Subject: Re: [Xen-devel] Attempt to load 2.6.31-rc8 under Xen 3.4.1 on top of 
> Ubuntu 9.04 Server ( JF's 2.6.31 loaded as vanilla)
> To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
> Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Konrad 
> Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx>
> Date: Friday, September 11, 2009, 11:55 AM
> 
> On Fri, Sep 11, 2009 at 08:07:54AM -0700, Boris Derzhavets wrote:
> > Out of ideas how to setup serial console on Ubuntu 9.04 for vanilla kernel.
> > 
> > title vmlinuz-2.6.31-rc8 Serial / Ubuntu 9.04 Jaunty (kernel 2.6.31-rc8)
> >     kernel  /vmlinuz-2.6.31-rc8  root=/dev/sdc2  ro com1=9600,8n1 
> > console=com1 console=ttyS0 
> >     initrd  /initrd-2.6.31-rc8.img
> > 
> > doesn't work.
> > 
> > Googling provides outdated information. (RH 7.2, Suse 10.2)
> > It just crashes grub.
> > 
> 
> serial console setup for normal Linux kernel (non-xen):
> 
> vmlinuz root=whatever ro console=tty0 console=ttyS0,9600n8
> 
> That should work if it's a normal onboard serial port.
> 
> If that doesn't work then try with "console=ttyS0,9600", 
> which enables flow control.
> 
> Read more here:
> http://tldp.org/HOWTO/Remote-Serial-Console-HOWTO/configure-kernel.html
> 
> -- Pasi
> 
> > Boris.
> > 
> > 
> > 
> > --- On Fri, 9/11/09, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> > 
> > From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > Subject: Re: [Xen-devel] Attempt to load 2.6.31-rc8 under Xen 3.4.1 on top 
> > of Ubuntu 9.04 Server ( JF's 2.6.31 loaded as vanilla)
> > To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
> > Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
> > Date: Friday, September 11, 2009, 9:38 AM
> > 
> > On Fri, Sep 11, 2009 at 05:56:56AM -0700, Boris Derzhavets wrote:
> > > The most recent 2.6.31 built via Jeremy's Git Repos loads as vanilla on
> > > top of Ubuntu 9.04 Server.
> > 
> > Boris,
> > 
> > Let me specific. Please boot up without Xen, the kernel
> > that was built on Wed Sep 9 16:02:46 MSD 2009(2.6.31-rc8), and use
> > the serial console.
> > 
> > Using the vanilla kernel does not help me. I need to understand what is 
> > different when you boot 2.6.31-rc8 under Xen and without Xen. Comparing
> > it to a 2.6.31 is not helping.
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> > 
> > 
> > 
> >       
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
> 
> 
> 
>       

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