Re: [Xen-users] Ubuntu Xen Kernel linux-image-4.15.0-64-generic no network devices

[Sarah Newman <srn@xxxxxxxxx>]

On 9/27/19 4:35 PM, Bill MacAllister wrote:
> On 2019-09-27 13:38, Sarah Newman wrote:
> > On 9/27/19 11:00 AM, Bill MacAllister wrote:
> > > I applied package dates, i.e. apt full-upgrade, to a Ubuntu 18.04 system and
> > > when it rebooted there were no network devices.  The new kernel version is
> > > linux-image-4.15.0-64-generic.  When I rebooted the system with the older
> > > linux-image-4.15.0-54-generic kernel the network devices reappeared. I would
> > > appreciate some suggestions on how to decipher this problem.
> > >
> > > Thanks,
> > >
> > > Bill
> > I'm assuming you mean a domU, not a dom0. We've booted that exact
> > kernel both in PV and HVM mode with no issues.
> No, I do mean dom0.  None of the domU's were willing to come up with the
> network in place.
>
> > Did you have any messages related to eth0 or xen_netfront from dmesg?
> > Is it reproducible?
> Yes, it is reproducible.  I will need to reboot the system to get exact
> messages from dmesg.  I do that later tonight.
If it's the dom0, I think it's less likely to be a xen specific issue. The first thing I would check is whether one of the partitions ran out of space 
or if one of the extra kernel module packages didn't get installed. You can compare the contents of /lib/modules for each version against each other.
--Sarah

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