networking dead after resume from sleep

[Jerry Quinn]

On resume, networking was disabled and I could not reenable it. There are warnings in the kernel log that are concerning. Networking used to be stable on resume. This kernel or perhaps a previous one seems to have made it less so.

jlquinn@tiamat:~/x1carbon$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic

jlquinn@tiamat:~/x1carbon$ apt-cache policy linux-image-3.16.0-33-generic
linux-image-3.16.0-33-generic:
  Installed: 3.16.0-33.44
  Candidate: 3.16.0-33.44
  Version table:
 *** 3.16.0-33.44 0
        500 http://us.archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ utopic-security/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu/ utopic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-33-generic 3.16.0-33.44
ProcVersionSignature: Ubuntu 3.16.0-33.44-generic 3.16.7-ckt7
Uname: Linux 3.16.0-33-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: jlquinn 2435 F.... pulseaudio
 /dev/snd/controlC0: jlquinn 2435 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Mar 23 14:50:01 2015
HibernationDevice: RESUME=UUID=650995f4-6763-4d42-966e-5c0689b207ea
InstallationDate: Installed on 2014-10-08 (166 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: LENOVO 20A8S0SG00
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-33-generic root=UUID=95206ff2-9e2a-4ea3-b390-c5235863b247 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-33-generic N/A
 linux-backports-modules-3.16.0-33-generic N/A
 linux-firmware 1.138.1
SourcePackage: linux
UpgradeStatus: Upgraded to utopic on 2015-02-28 (23 days ago)
dmi.bios.date: 09/02/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GRET40WW (1.17 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20A8S0SG00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGRET40WW(1.17):bd09/02/2014:svnLENOVO:pn20A8S0SG00:pvrThinkPadX1Carbon2nd:rvnLENOVO:rn20A8S0SG00:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20A8S0SG00
dmi.product.version: ThinkPad X1 Carbon 2nd
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.0 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc5-vivid/

[Jerry Quinn (jlquinn)]

I just received a kernel update:

3.16.0-34-generic

I'm going to give this a chance first. If I still get failures, I'll try the upstream kernel.

Thanks
Jerry