On Sunday, December 31, 2017 at 10:13:49 AM UTC-5, 
qubes-us...@ralphdouglass.com wrote:
> On Tuesday, December 26, 2017 at 10:30:45 AM UTC-5, Kushal Das wrote:
> > On Tue, Dec 26, 2017 at 8:18 PM, cooloutac wrote:
> > >
> > > wonder if your system runs low on ram?  Could also try using system 
> > > without iommu and see if it still happens.
> > >
> > I have 32GB here on a T470. I hope that is okay :)
> > 
> > Kushal
> > -- 
> > Staff, Freedom of the Press Foundation
> > CPython Core Developer
> > Director, Python Software Foundation
> > https://kushaldas.in
> I can recreate this error message consistently while running the latest R4 
> rc3.
> Inside of sys-net, just shut down the vm from the inside (e.g. sudo reboot)
> Afterwards sys-net fails to start:
> $ qvm-start sys-net
> Start failed: invalid argument: network device with mac XX:XX:XX:XX:XX:XX 
> already exists
> To get back in a good state without rebooting the entire machine, I have to 
> shut down (or kill) all dependent vms (AppVMs talking to my firewall-vm and 
> my firewall vm).  Then I can start sys-net again, followed by my firewall vm, 
> followed by my regular app vms.
> I've managed to trigger this on two Lenovo laptops and one Dell laptop so 
> far, all of which are running R4rc3.
> I'm pretty new to QubesOS and haven't figured out how to dig through the 
> innards well enough yet to find anything useful.

afaik, You can't shut down sys-net if other vms using it are running.

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