Re: [Xen-users] Xen on Pentium M laptop?

[Ken Mandelberg <km@xxxxxxxxxxxxxxxx>]

James Harper wrote, On 08/09/08 09:26:
> > When I boot, Xen seems to be going OK, and tells me its giving up the
> > VGA. A little time goes on and then the VGA screen clears, after which
> > there is no response to the keyboard or anything more on the screen.
> >
> > The laptop does in fact answer pings, and in fact accepts ssh
> > connections. However, the ssh connections just hang with no response.
> I don't know about the lack of keyboard or screen activity, but in the
> case where icmp works and tcp handshake packets work but tcp data
> packets don't, i'd fire up tcpdump on another box and see if your tcp
> data packets are going out with invalid checksums (eg checksum
> offloading isn't working). I've seen this before just recently on
> another mailing list.
>
> Of course there are a bunch of other causes that would give you the same
> problems too.
>
> James
James, thanks for the suggestion, but that doesn't seem to be it. The 
tcpdump shows
  1   0.000000 192.168.10.2 -> 192.168.10.30 TCP 61336 > ssh [SYN] 
Seq=3942416159 Ack=0 Win=49640 Len=0
  2   0.000207 192.168.10.30 -> 192.168.10.2 TCP ssh > 61336 [SYN, ACK] 
Seq=895959597 Ack=3942416160 Win=5840 Len=0
  3   0.000271 192.168.10.2 -> 192.168.10.30 TCP 61336 > ssh [ACK] 
Seq=3942416160 Ack=895959598 Win=49640 Len=0
  4  38.858578 192.168.10.2 -> 192.168.10.30 TCP 61336 > ssh [FIN, ACK] 
Seq=3942416160 Ack=895959598 Win=49640 Len=0
  5  38.859051 192.168.10.30 -> 192.168.10.2 TCP ssh > 61336 [ACK] 
Seq=895959598 Ack=3942416161 Win=46 Len=0

Nothing but the tcp handshake followed by silence until I break the 
connection. A more verbose dump shows no checksum errors.
Ken

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