Ubuntu
linux-lts-vivid package

[Lenovo M700z] Wifi malfunctions after updating system

Bug #1659614 reported by Taihsiang Ho
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Triaged
Medium
Unassigned
linux-lts-vivid (Ubuntu)
Triaged
Medium
Unassigned

Bug Description

Lenovo M700z (CID 201601-20436) with its pre-installed image.

[Steps To Reproduce]
Enable the proposed pocket, and then update the system by 'sudo apt-get dist-upgrade'

[Expected Result]
Wifi works

[Actual Result]
Wifi malfunctions. The network indicator does not show any wireless AP.

--------

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.19.0-80-generic 3.19.0-80.88~14.04.1
ProcVersionSignature: Ubuntu 3.19.0-80.88~14.04.1-generic 3.19.8-ckt22
Uname: Linux 3.19.0-80-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: amd64
Date: Fri Jan 27 01:28:34 2017
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-sutton-m700z-trusty-amd64-20160314-0
InstallationDate: Installed on 2017-01-25 (1 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Failed to find casper uuid.conf in 'binary/casper/initrd.img-3.19.0-37-generic.old-dkms' LIVE Binary 20160314-09:31
SourcePackage: linux-lts-vivid
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
Taihsiang Ho (taihsiangho) wrote :
Revision history for this message
Joseph Salisbury (jsalisbury) wrote :

Does the bug go away if you boot into the previous kernel version?

Changed in linux-lts-vivid (Ubuntu):
status: New → Triaged
importance: Undecided → Medium
Changed in linux (Ubuntu):
status: New → Triaged
importance: Undecided → Medium
tags: added: kernel-da-key
Revision history for this message
Taihsiang Ho (taihsiangho) wrote :

The bug is still there if I boot into the previous kernel version (3.19.0-79.87~14.04.1). However, two weeks ago it did not has this bug with the previous proposed kernel (3.19.0-79.87~14.04.1).

Revision history for this message
Brad Figg (brad-figg) wrote :

@taihsiang,

I'd like you to try 2 things:

1. Install the same kernel just like you did and if you have the same failure power the system off and then back on and see if you still have the problem.

2. Test with the lts-xenial kernel and see if you have the same issue.

Joseph Salisbury (jsalisbury)
tags: added: kernel-key
Revision history for this message
Taihsiang Ho (taihsiangho) wrote :

@brad

1. This issue could reproduce after power-off and back on with the kernel 3.19.0-80-generic #88~14.04.1-Ubuntu

2. This issue could NOT reproduce with the kernel lts-xenial (4.4.0-62-generic #83~14.04.1-Ubuntu)

Joseph Salisbury (jsalisbury)
tags: removed: kernel-key
To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.