Public bug reported:

After resuming from sleep, the NIC is not functional, and reloading the
sky2 module does not work. Relevant parts from dmesg:

[  582.852065] sky2 0000:04:00.0: Refused to change power state, currently in D3
...
[  827.613729] sky2 0000:04:00.0: ignoring stuck error report bit
[  827.613748] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613750] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613752] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613754] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613756] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613759] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613761] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613763] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613765] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613767] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613769] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613772] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613774] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613776] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613778] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613780] sky2 0000:04:00.0: enp4s0: phy I/O error
[  827.613782] sky2 0000:04:00.0: enp4s0: phy I/O error

And after reloading the module:
[ 1421.781480] sky2: driver version 1.30
[ 1421.781533] sky2 0000:04:00.0: enabling device (0000 -> 0003)
[ 1421.781667] sky2 0000:04:00.0: unsupported chip type 0xff
[ 1421.782292] sky2: probe of 0000:04:00.0 failed with error -95

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-12-generic 4.15.0-12.13
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k4.15.0-12-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', 
'/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', 
'/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
Date: Sat Mar 24 09:54:10 2018
HibernationDevice: RESUME=UUID=02d18685-fc92-4ebe-a43e-34d1e52a26b1
InstallationDate: Installed on 2018-03-21 (3 days ago)
InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Alpha amd64 
(20180319)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: FUJITSU SIEMENS ESPRIMO Mobile U9200
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-12-generic 
root=UUID=bc171dce-b703-44f6-8244-22b6b3b1dc33 ro video=SVIDEO-1:d 
consoleblank=300
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-12-generic N/A
 linux-backports-modules-4.15.0-12-generic  N/A
 linux-firmware                             1.173
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/22/2008
dmi.bios.vendor: Phoenix
dmi.bios.version: 1.11 - 067 - 1566
dmi.board.name: S11D
dmi.board.vendor: FUJITSU SIEMENS
dmi.board.version: 1.0
dmi.chassis.asset.tag: FSC
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnPhoenix:bvr1.11-067-1566:bd04/22/2008:svnFUJITSUSIEMENS:pnESPRIMOMobileU9200:pvr1.0:rvnFUJITSUSIEMENS:rnS11D:rvr1.0:cvnFUJITSUSIEMENS:ct10:cvr1.0:
dmi.product.name: ESPRIMO Mobile U9200
dmi.product.version: 1.0
dmi.sys.vendor: FUJITSU SIEMENS

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

** Description changed:

- *TODO*
+ After resuming from sleep, the NIC is not functional, and reloading the
+ sky2 module does not work. Relevant parts from dmesg:
+ 
+ [  582.852065] sky2 0000:04:00.0: Refused to change power state, currently in 
D3
+ ...
+ [  827.613729] sky2 0000:04:00.0: ignoring stuck error report bit
+ [  827.613748] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613750] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613752] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613754] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613756] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613759] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613761] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613763] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613765] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613767] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613769] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613772] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613774] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613776] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613778] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613780] sky2 0000:04:00.0: enp4s0: phy I/O error
+ [  827.613782] sky2 0000:04:00.0: enp4s0: phy I/O error
+ 
+ And after reloading the module:
+ [ 1421.781480] sky2: driver version 1.30
+ [ 1421.781533] sky2 0000:04:00.0: enabling device (0000 -> 0003)
+ [ 1421.781667] sky2 0000:04:00.0: unsupported chip type 0xff
+ [ 1421.782292] sky2: probe of 0000:04:00.0 failed with error -95
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-12-generic 4.15.0-12.13
  ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
  Uname: Linux 4.15.0-12-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k4.15.0-12-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', 
'/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', 
'/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Date: Sat Mar 24 09:54:10 2018
  HibernationDevice: RESUME=UUID=02d18685-fc92-4ebe-a43e-34d1e52a26b1
  InstallationDate: Installed on 2018-03-21 (3 days ago)
  InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Alpha amd64 
(20180319)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  MachineType: FUJITSU SIEMENS ESPRIMO Mobile U9200
  ProcEnviron:
-  LANGUAGE=en_US:en
-  TERM=linux
-  PATH=(custom, no user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US:en
+  TERM=linux
+  PATH=(custom, no user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-12-generic 
root=UUID=bc171dce-b703-44f6-8244-22b6b3b1dc33 ro video=SVIDEO-1:d 
consoleblank=300
  RelatedPackageVersions:
-  linux-restricted-modules-4.15.0-12-generic N/A
-  linux-backports-modules-4.15.0-12-generic  N/A
-  linux-firmware                             1.173
+  linux-restricted-modules-4.15.0-12-generic N/A
+  linux-backports-modules-4.15.0-12-generic  N/A
+  linux-firmware                             1.173
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/22/2008
  dmi.bios.vendor: Phoenix
  dmi.bios.version: 1.11 - 067 - 1566
  dmi.board.name: S11D
  dmi.board.vendor: FUJITSU SIEMENS
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: FSC
  dmi.chassis.type: 10
  dmi.chassis.vendor: FUJITSU SIEMENS
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnPhoenix:bvr1.11-067-1566:bd04/22/2008:svnFUJITSUSIEMENS:pnESPRIMOMobileU9200:pvr1.0:rvnFUJITSUSIEMENS:rnS11D:rvr1.0:cvnFUJITSUSIEMENS:ct10:cvr1.0:
  dmi.product.name: ESPRIMO Mobile U9200
  dmi.product.version: 1.0
  dmi.sys.vendor: FUJITSU SIEMENS

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https://bugs.launchpad.net/bugs/1758507

Title:
  sky2 gigabit ethernet driver stops working after resume from sleep
  (88E8055)

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