Re: [Xen-users] Failed Network

[MCresearch <mike.pk@xxxxxxxxx>]

Ok so after three days of farkling with this thing I found a  
solution. Although I tried the "noapic" xen boot option to no result,  
if I turn off apic support in the *bios* then the network card comes  
up.  I don't know if this a specific problem to nForce3 motherboards,  
my specific motherboard, shuttle boards, or something more general,  
but I thought I'd post this in case someone else runs across this  
same nightmare.
Another note, if I run with "noapic" xen boot option and the APIC  
support turned off in BIOS, I ran across some IRQ conflicts. I had to  
just turn off the apic support in bios and leave the Xen boot options  
without "noapic". I don't know how stable this is yet, but here's  
fingers crossed.
-Mike

On Sep 21, 2005, at 8:13 PM, MCresearch wrote:

> I'm at my wits end maybe someone out there can help me.
>
> Machine
> Shuttle AN51R Motherboard
> 1GB ram
> AMD-64 3000+ (2GHz)
> 20GB HD (western digital) with 1GB for minimal install, 500MB for  
> swap, and the rest I had planned to use for LVM volumes for VMs.
> I've been running ubuntu 5.04 (hoary) happy as a clam for a while  
> now no problems. Now I've started investigating Xen and for the  
> life of me I can't get it to work properly. I've done clean minimal  
> installs of both Ubuntu Hoary and Debian sarge.
> Everything looks like it runs ok until I log in and try to access  
> the network.
> The primary symptom is that the network interface doesn't work.  
> It's enumerated in the bootup (Broadcom Tigon3) and tg3 is built  
> into the standard binary release kernels (I'm using  
> vmlinuz-2.6.11.12-xen0) but when dhclient runs it fails to get an  
> IP address. I can bring the interface up and down, and it still  
> refuses to work. I can assign it a manual IP address, but it still  
> doesn't communicate on the network (no ping, etc). If I boot the  
> standard (no xen) kernel, all is fine and the network works properly.
> in dmesg (from debian) the network card is found
> eth0: Tigon3 [partno(yadda yadda) rev blah blah(]
> 1000BaseT Ethernet XX:XX:XX:XX:XX (<---- Mac address)
> eth0: RXcsums[1] etc etc etc...
>
> What I've tried
> Multiple distributions, clean installs
> The standard binary Xen release kernels
> Compiling my own Xen kernels
>        lots of different kernel options -> with modules, without  
> modules, tg3 built in, AGP on, AGP off... I can get them all to  
> boot but no network.
> Different kernel versions 2.4 and 2.6, same behavior
> using an initrd, same behavior
> booting xen.gz with
>       noapic, acpi=off, watchdog all show the same "no network"  
> behavior
> Nothing in dmesg or syslog seem to be out of place that I can tell.
> The only errors I see are regarding USB a few errors that look like
> hub 1-0:1.0: Cannot enable port 3. Maybe the USB cable is bad?
> -and-
> usb 1-3: device descriptor read/64, error -110
>
> and in debian dhclient output shows on boot, and you can see the  
> failure to get a DHCP offer.
> I really have no idea what to try next. (and everytime I go back to  
> booting a "regular" kernel everything is fine again.. grrrr)
> Please, any help would be *greatly* appreciated as I've become very  
> frustrated with this effort.
> -Mike
>
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