Re: [Xen-devel] error on booting XenLinux

[Brian Wolfe <brianw@xxxxxxxxxxxx>]

Interesting. So if I use the serial port driver as a module, then I
*should* be able to get to com2 while com1 is in use by xen as a serial
console?

On Fri, 2004-08-20 at 17:14, Ian Pratt wrote:
> > > Serial: 8250/16550 driver $Revision: 1.90 $ 48 ports, IRQ sharing enabled
> > > Serial: 8250/16550 driver $Revision: 1.90 $ 48 ports, IRQ sharing enabled
> > 
> > You currently have to keep the 8250 driver disabled.  Unfortunate, as it
> > means you can't get to real serial ports afaict, and it means that
> > drivers like mwave just won't work.
> 
> You've pointed out Brian's problem, but the situation isn't as
> bad as you think.
> 
> If you want to have the domain access the serial port directly
> rather than going via Xen then:
>  1) *don't* have a com1= entry on the Xen command line
>  2) Have "xencons=off" on the linux command line
> 
> You can then configure the serial port however you like (though I
> haven't tested it under 2.6).
> 
> For most users, I think it makes more sense to have Xen own the
> serial port and for dom0 to send its output via the xencons
> driver registered on ttyS0. That way you get the ouput from both
> dom0 and Xen.
> 
> Best,
> Ian
> 
> 
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