It looks like this has been fixed upstream. I will close it. If the
problem still occurs, please reopen it.
** Changed in: linux (Ubuntu)
Status: Triaged => Won't Fix
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https://bugs.launchpad.net/bugs/991232
Title:
14e4:432b Regression in wireless performance when on battery power
Status in linux package in Ubuntu:
Won't Fix
Bug description:
1. Steps I took that caused me to encounter the problem:
disconnect the A/C power cable from the laptop, laptop then runs on battery
power
2. expected behavior:
same network speed as on A/C power
3. behavior actually encountered:
very slow network speed
network speed on A/C power:
bheinsius@bheinsius-Latitude-E6400:~$ ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=1.62 ms
64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=1.29 ms
64 bytes from 192.168.0.1: icmp_req=3 ttl=64 time=1.29 ms
64 bytes from 192.168.0.1: icmp_req=4 ttl=64 time=1.42 ms
network speed on battery power:
bheinsius@bheinsius-Latitude-E6400:~$ ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=43.4 ms
64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=63.9 ms
64 bytes from 192.168.0.1: icmp_req=3 ttl=64 time=85.6 ms
64 bytes from 192.168.0.1: icmp_req=4 ttl=64 time=108 ms
WORKAROUND: Disable the power saving measures implemented by
/usr/lib/pm-utils/power.d/wireless.
To disable them do:
sudo touch /etc/pm/power.d/wireless
You now should have an empty file named wireless without the executable bit
set in /etc/pm/power.d.
Check with:
ls -lh /etc/pm/power.d/
You should see a file like this:
-rw-r--r-- 1 root root 0 2010-12-31 18:53 wireless
Reference: man pm-powersave
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bcmwl-kernel-source 5.100.82.38+bdcom-0ubuntu6.1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
NonfreeKernelModules: nvidia wl
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Sun Apr 29 18:24:00 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386
(20120423)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: bcmwl
UpgradeStatus: No upgrade log present (probably fresh install)
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: bheinsius 2270 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf6fdc000 irq 46'
Mixer name : 'IDT 92HD71B7X'
Components : 'HDA:111d76b2,10280233,00100302'
Controls : 19
Simple ctrls : 10
DistroRelease: Ubuntu 12.04
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=4fa3e949-ad70-4c6d-99ad-9f1db6e913cd
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386
(20120423)
MachineType: Dell Inc. Latitude E6400
NonfreeKernelModules: nvidia wl
Package: linux (not installed)
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae
root=UUID=40f929d3-6262-4978-9484-f29ad1c9be88 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic-pae N/A
linux-backports-modules-3.2.0-24-generic-pae N/A
linux-firmware 1.79
SourcePackage: linux
Tags: precise precise
Uname: Linux 3.2.0-24-generic-pae i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
dmi.bios.date: 12/07/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A31
dmi.board.name: 0RX495
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA31:bd12/07/2011:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0RX495:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.
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