I have the same problem as the reporting guy but in my case it's an HP laptop
with Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)
wireless adapter.
The problem is noticed when I donwnload big files from the internet, the
connection is cut although it appears connected in the network panel. Executing
sudo service network-manager restart
connects again and I can resume my download but it's very annoing doing
it every 5 minutes. I've tried the fix in this post but I get this
message:
$ sudo iwconfig wlan0 power on
Error for wireless request "Set Power Management" (8B2C) :
SET failed on device wlan0 ; Operation not supported.
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https://bugs.launchpad.net/bugs/1312358
Title:
14e4:4331 [MacBookPro10,2] wifi intermittent Ubuntu 14.04
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Problem: wifi is intermittent on my Macbook Pro and the logfile shows it's
disconnecting
Hardware System: Macbook Pro Retina 13" version 10,2 early 2013
wifi firmware installed was default in Ubuntu 14.04 (mac 64bit OS) and
synaptic shows the bcmwl-kernel-source to be installed. I get intermittent
disconnections from the wifi which is set to g-only. Other wifi router settings
have not been any better. Changing the wifi installation from the default of
Ubuntu 14.04 have not improved things. I tried the firmware-b43-installer with
similar results as above.
iwconfig wlan0 | grep 'Power Management'
Power Management:off
WORKAROUND: Turn WiFi Power Management on.
---
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: viking 2055 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=9a76124f-99fb-4ba8-8c94-f09d985809e9
InstallationDate: Installed on 2014-04-24 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64+mac
(20140417)
MachineType: Apple Inc. MacBookPro10,2
NonfreeKernelModules: wl
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: \boot\vmlinuz-3.13.0-24-generic ro
root=UUID=b6a171a9-799e-44f1-ab31-7d0940a39646
initrd=boot\initrd.img-3.13.0-24-generic
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
Tags: trusty
Uname: Linux 3.13.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 11/16/2012
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP102.88Z.0106.B03.1211161133
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-AFD8A9D944EA4843
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro10,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-AFD8A9D944EA4843
dmi.modalias:
dmi:bvnAppleInc.:bvrMBP102.88Z.0106.B03.1211161133:bd11/16/2012:svnAppleInc.:pnMacBookPro10,2:pvr1.0:rvnAppleInc.:rnMac-AFD8A9D944EA4843:rvrMacBookPro10,2:cvnAppleInc.:ct10:cvrMac-AFD8A9D944EA4843:
dmi.product.name: MacBookPro10,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
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