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 Sat, Sep 12, 2009 at 11:24:47PM -0700, Boris Derzhavets wrote:
> For 2.6.31 loaded as vanilla :-
> 
> Linux ServerJaunty 2.6.31 #3 SMP Fri Sep 11 02:19:43 CDT 2009 x86_64 GNU/Linux
> root@ServerJaunty:~# dmesg | grep ttyS
> [   13.811223] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> [   13.903839] 00:0b: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 
> It's integrated on board (ASUS P5Q-E) and connected via small cable to
> output socket.
> 

Well you could always use "dmesg > dmesg.txt" .. 

No need to setup serial console, unless the kernel crashes..

If it crashes, try to use only "console=ttyS0,blah", ie. drop "console=tty0"

-- Pasi

> Boris. 
> 
> --- On Sat, 9/12/09, 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: Saturday, September 12, 2009, 4:44 PM
> 
> 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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