I found a workaround for Ubuntu 16.04 LTS:
(1) Open "Network connections" ("nm-connection-editor" from command line)
(2) Try to figure out which "Ethernet" connection is iPad
(3) Select the iPad and click "Edit"
(4) On "General" tab, uncheck "Automatically connect to this network when it is
available"
(5) On "IPv4 Settings" tab select "Method: Disabled"
(6) On "IPv6 Settings" tab select "Method: Ignore"
It seems that the issue is caused by iPad/iPhone pretending to offer
Ethernet connection and "upowerd" automatically trying to enable that
connection. This operation fails and "upowerd" is stupid enough to
repeat the process forever.
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Touch seeded packages, which is subscribed to upower in Ubuntu.
https://bugs.launchpad.net/bugs/876279
Title:
Upowerd excessive CPU usage
Status in upower package in Ubuntu:
Confirmed
Bug description:
Fresh installation of Oneiric on Activo A-1100 (Atom N450-based)
netbook. Top reports CPU usage fluctuating between 60% and 100%,
averaging around 80%. Machine still marginally usable, due to having a
second core.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: upower 0.9.13-1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: wl
ApportVersion: 1.23-0ubuntu3
Architecture: i386
Date: Mon Oct 17 18:59:31 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
LANGUAGE=en_AU:en
PATH=(custom, no user)
LANG=en_AU.UTF-8
SHELL=/bin/bash
SourcePackage: upower
UpgradeStatus: No upgrade log present (probably fresh install)
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