apport information ** Tags added: apport-collected
** Description changed: 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. ** Attachment added: "AcpiTables.txt" https://bugs.launchpad.net/bugs/991232/+attachment/3128388/+files/AcpiTables.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/991232 Title: Regression in wireless performance when on battery power (broadcom) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/991232/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
