Comment # 2 on bug 985531 from andreas bittner

Just experienced this again with some KOTD kernel on leap 42.1 x64



Linux linux 4.8.0-rc3-1.gc0d2ef5-default #1 SMP PREEMPT Mon Aug 22 14:52:18 UTC
2016 (c0d2ef5) x86_64 x86_64 x86_64 GNU/Linux


ifconfig after wake:

ifconfig 
eth1      Link encap:Ethernet  HWaddr E0:CB:4E:BA:5C:32  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:131380 errors:0 dropped:0 overruns:0 frame:0
          TX packets:85902 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:173796479 (165.7 Mb)  TX bytes:8733259 (8.3 Mb)


-------


status of NetworkManager.service shows how long the machine had slept

systemctl status NetworkManager
NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled)
   Active: active (running) since Wed 2016-08-31 23:33:07 CEST; 2 days ago
 Main PID: 11420 (NetworkManager)
   CGroup: /system.slice/NetworkManager.service
           ������11420 /usr/sbin/NetworkManager --no-daemon




Aug 31 23:44:48 linux NetworkManager[11420]: ATTENTION: You have modified
/etc/resolv.conf.  Leaving it untouched...
Aug 31 23:44:48 linux NetworkManager[11420]: You can find my version in
/etc/resolv.conf.netconfig ...
Aug 31 23:44:48 linux NetworkManager[11420]: <info>  NetworkManager state is
now ASLEEP
Aug 31 23:44:48 linux NetworkManager[11420]: <info>  (eth1): link disconnected
Sep 03 21:29:54 linux NetworkManager[11420]: <info>  wake requested (sleeping:
yes  enabled: yes)
Sep 03 21:29:54 linux NetworkManager[11420]: <info>  waking up...
Sep 03 21:29:54 linux NetworkManager[11420]: <info>  (eth1): device state
change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Sep 03 21:29:54 linux NetworkManager[11420]: <info>  NetworkManager state is
now DISCONNECTED
Sep 03 21:29:57 linux NetworkManager[11420]: <info>  (eth1): link connected
Sep 03 21:29:57 linux NetworkManager[11420]: <info>  (eth1): device state
change: unavailable -> disconnected (reason 'carrier-changed'... 30 40]
Hint: Some lines were ellipsized, use -l to show in full.



I needed to issue a restart of this service to retrieve ipv4 and ipv6 addresses
again afterwards

the machine has some pcie based realtek gigabit network

hwinfo --network
41: None 01.0: 10701 Ethernet                                   
  [Created at net.125]
  Unique ID: L2Ua.ndpeucax6V1
  Parent ID: JNkJ.7jPWmoeCYd4
  SysFS ID: /class/net/eth1
  SysFS Device Link: /devices/pci0000:00/0000:00:0a.0/0000:02:00.0
  Hardware Class: network interface
  Model: "Ethernet network interface"
  Driver: "r8169"
  Driver Modules: "r8169"
  Device File: eth1
  HW Address: e0:cb:4e:ba:5c:32
  Link detected: yes
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #20 (Ethernet controller)