Resume Issue with em(4) ALPHA7

[Johannes Lundberg]

On Sun, Sep 30, 2018 at 8:24 AM Ali Abdallah <aliovx at gmail.com> wrote:

> I'm having also the same problem on my Thinkpad x230. However I'm running a
> minimal kernel, so usually I do kldunload/kldload if_em,
> to reset the hardware and to avoid a reboot.
>
> Hopefully this gets fixed soon.
>
>
Hi

I've been having the same problem for at least several months with if_em,
hw I218-LM and I219-LM.
Need to unload and reload if_em to make it work again after resume.


/Johannes

Cheers,
> Ali
>
> On Sat, Sep 29, 2018 at 7:06 PM Pete Wright <pete at nomadlogic.org> wrote:
>
> > Hello,
> >
> > More suspend/resume testing on my end.  This system is a desktop, so not
> > critical for my daily workflow but wanted to flag it regardless.  The
> > system is a Lenovo m900 with skylake and em(4) NIC.  Entering suspend
> > works without issues, resuming seems to mostly work as well.  I.e. no
> > issues with display or input from keyboard or mouse.
> >
> > The one issue I am running into is my NIC is non-functional after
> > resume.  restarting the network stack via "service netif restart" does
> > not work - as in no DHCP lease is aquired and no link is detected.  Nor
> > does manually down'ing and up'ing the interface work.  I see these
> > messages in my dmesg buffer after resume:
> >
> > in6_purgeaddr: err=65, destination address delete failed
> > lo0: link state changed to DOWN
> > lo0: link state changed to UP
> > Link state changed to down
> > em0: link state changed to DOWN
> > em0: TX(0) desc avail = 1024, pidx = 0
> > em0: TX(0) desc avail = 1024, pidx = 0
> > em0: TX(0) desc avail = 1024, pidx = 0
> > em0: TX(0) desc avail = 1024, pidx = 0
> >
> > Another thing I noticed is that after resume "ifconfig" hangs for a
> > couple seconds printing after printing the first line of my em0 device
> > (after the flags).  Not sure if that's helpful but thought it could be a
> > useful datapoint.
> >
> > It is easy to reproduce this, so I am happy to do any additional
> > debugging or testing on this.
> >
> >
> > Cheers,
> >
> > -pete
> >
> > --
> > Pete Wright
> > pete at nomadlogic.org
> > @nomadlogicLA
> >
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