Sporadically after resume from suspend to RAM there is no wifi connection. There are no errors in kernel log, just no connection:
[101937.000998] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[101937.003094] iwlwifi 0000:02:00.0: L1 Disabled - LTR Enabled
[101937.003257] iwlwifi 0000:02:00.0: L1 Disabled - LTR Enabled
[101937.067718] iwlwifi 0000:02:00.0: L1 Disabled - LTR Enabled
[101937.067879] iwlwifi 0000:02:00.0: L1 Disabled - LTR Enabled
[101937.082365] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[101937.189536] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Reloading iwlwifi + iwlmvm modules clears it and connection is established immediately.
Several times connection also dropped during normal activity; not sure whether this is related.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.8.0-39-generic 4.8.0-39.42~16.04.1
ProcVersionSignature: Ubuntu 4.8.0-39.42~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-39-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Feb 26 19:58:12 2017
DistributionChannelDescriptor:
# This is a distribution channel descriptor
# For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-trusty-amd64-20140620-0
InstallationDate: Installed on 2015-07-02 (605 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
SourcePackage: linux-hwe
UpgradeStatus: Upgraded to xenial on 2016-10-29 (120 days ago)
---
ApportVersion: 2.20.1-0ubuntu2.16
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: bor 2230 F.... pulseaudio
/dev/snd/controlC0: bor 2230 F.... pulseaudio
CurrentDesktop: Unity
DistributionChannelDescriptor:
# This is a distribution channel descriptor
# For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-trusty-amd64-20140620-0
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=df2037e2-aa56-4079-9f35-49d94d595d93
InstallationDate: Installed on 2015-07-02 (1042 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
MachineType: Dell Inc. Latitude E5450
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-41-generic.efi.signed root=UUID=d06b07a3-04bf-46e1-8cae-5f2592c69192 ro quiet splash pcie_aspm=force radeon.modeset=0 video.use_native_backlight=1 video.use_native_backlight=1 crashkernel=384M-2G:128M,2G-:256M
ProcVersionSignature: Ubuntu 4.13.0-41.46~16.04.1-generic 4.13.16
RelatedPackageVersions:
linux-restricted-modules-4.13.0-41-generic N/A
linux-backports-modules-4.13.0-41-generic N/A
linux-firmware 1.157.17
Tags: xenial
Uname: Linux 4.13.0-41-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 01/23/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A19
dmi.board.name: 06J17N
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA19:bd01/23/2018:svnDellInc.:pnLatitudeE5450:pvr:rvnDellInc.:rn06J17N:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5450
dmi.sys.vendor: Dell Inc.
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1668080
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.