Re: [Xen-users] xenfs: not registering fielsystem on no-xen platform

["Austin S. Hemmelgarn" <ahferroin7@xxxxxxxxx>]

On 2016-05-12 15:31, jrun wrote:
> On Thu, May 12, 2016 at 02:34:41PM -0400, Austin S. Hemmelgarn wrote:
> > On 2016-05-12 13:26, jrun wrote:
> > > On Thu, May 12, 2016 at 12:23:14PM -0400, jrun wrote:
> > > > i don't think i have a serial console on this asus desktop mb unless there
> > > > is a trick to get something out of usb?
> > > >
> > > >
> > > > --jrun
> > > hmm, doesn't xen have netconsole?
> > Linux does, but I don't think Xen does.
> >
> > You probably do have a serial port on your motherboard, it's just a header
> > on the MB instead of an external connector.  The external connector has
> > fallen out of favor because it's big and not much uses it anymore, but I
> > have yet to see a commercially available x86 desktop motherboard that
> > doesn't have at least one 16655A UART hooked up to an internal header so
> > that a serial console can be used for debugging.
> could you post a pointer to a picture of such a thing. i've seen UART on
> embedded boards but on this mb (ASUS) i'm not sure.
It should be a 2.54mm pitch 2x5 header with one pin missing in a corner, 
with the missing pin placed such that you can't plug an internal USB 
cable into it, sometimes with a large shroud sized to fit an insulation 
displacement connector, similar to what you'd see on an embedded board. 
Usually, you can find 'UART1' or more often 'COM1' (sometimes with an _ 
just before the 1) silk-screened on the board nearby.
On most of the ATX and micro-ATX motherboards I've seen (including all 
such ASUS motherboards) it's on the farthest side from the CPU, near the 
audio and USB headers, often right up against the edge of the board.
> > If you're using an Intel system and have a CPU which supports vPro, you may
> > also be able to get a network console via AMT, although some BIOS/UEFI
> > configuration UI's don't properly support console redirection.  Taking that
> > approach may also require some extra command-line parameters for Xen, but
> > I'm not 100% certain about that.
> in BIOS i see 'Serial Port1 Address [3F8/IRQ4]' under ODC (there doesn't
> seem to be any AMT).
The fact that you see that in the BIOS is generally a good indication 
that you have a serial port _somewhere_ on the board, but of course 
provides no indication of where exactly.
As far as the AMT console redirection, it's usually not all that visible 
on anything but server systems, and often can't be configured at all 
from the BIOS on laptops and consumer desktops (in fact, I'm pretty sure 
the only systems we have where I work that have BIOS configuration for 
it are either servers, or workstations which have server motherboards).
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