Public bug reported:
Since upgrading to 15.04 a couple of weeks ago I have been finding that
sometimes my wifi completely stops working. Restarting network manager
doesn't help, nor does removing and reinserting the wireless driver. I
can get network access through an ethernet cable.
Another, possibly related problem I have been experiencing since
upgrading to 15.04 is that sometimes wpa_supplicant starts hogging CPU,
up to 100% on one core. When I kill it, the replacement instance of
wpa_supplicant continues to hog the CPU. I am not sure whether this is
caused by the same fault that is causing my wifi to fail. As I send this
error report, my machine is in such a crippled state with no wifi and
wpa_supplicant slowing everything to a crawl. I noticed that
wpa_supplicant was misbehaving only after I had tried removing and
reinserting the wifi driver, so I don't know whether the wifi failure
problem caused wpa_supplicant to go bananas, or whether it was the fact
that I had messed about with the driver.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: wpasupplicant 2.1-0ubuntu7.1
ProcVersionSignature: Ubuntu 3.19.0-18.18-lowlatency 3.19.6
Uname: Linux 3.19.0-18-lowlatency x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Jun 7 15:01:56 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-03-06 (93 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: wpa
UpgradeStatus: Upgraded to vivid on 2015-05-29 (8 days ago)
** Affects: wpa (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
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https://bugs.launchpad.net/bugs/1462740
Title:
Wifi intermittently stops working since 15.04 upgrade
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