This bug also affects natty. And gas extended to atheros wifi as well.
On Feb 22, 2011 5:36 AM, "Wolfgang Kufner" <email address hidden>
wrote:
> Turns out that the workaround (sudo touch /etc/pm/power.d/wireless) I
> described in the bug description will not be sufficient for all
> hardware. It just keeps the script in /usr/lib/pm-utils/power.d/wireless
> from switching to power save mode. At least with some hardware there are
> other things that can switch power save mode on.
>
> Stefan Rehm's workaround in comment #9 will (perhaps) work in this case.
> Doing configuration in /usr is however probably not the best solution.
>
> Another workaround is to put a small script into the file in
/etc/pm/power.d/wireless:
> gksu gedit /etc/pm/power.d/wireless
> in gedit write and save this:
> #!/bin/sh
> /sbin/iwconfig wlan0 power off
> set the file to executable with this:
> sudo chmod +x /etc/pm/power.d/wireless
> This workaround will however only work if sudo iwconfig wlan0 power off
works for your driver. Try this out before. Your wlan might be called
something other than wlan0 or you might need another command than iwconfig.
Also, just as with Stefan Rehm's workaround, I am not sure that there might
not be gaps between were something else switches power save on and this
script gets called and switches it back off.
>
> In summary: One of the above should probably work for you, but no
> workaround looks all that perfect. Stefan Rehm's workaround will work
> for the greatest number of cases.
>
>
>
>
>
> ** Description changed:
>
> [WORKAROUND]
> - Disable the power saving measures implemented by
/usr/lib/pm-utils/power.d/wireless.
> + (This will not fix all problems for all: see comment 24.)
> + 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.
> + 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
>
> [ORIGINAL REPORT]
> Since upgrading to maverick, wireless performance on my Macbook Pro 7.1
has been terrible. It was fine under lucid.
>
> Pinging the router:
>
>   13 packets transmitted, 12 received, 7% packet loss, time 12024ms
>   rtt min/avg/max/mdev = 52.867/574.644/1203.660/441.552 ms, pipe 2
>
> iperf to another machine connected via ethernet over power (typical
> latency from this machine is ~3ms to router)
>
>   [ ID] Interval Transfer Bandwidth
>   [ 3] 0.0-10.0 sec 136 KBytes 111 Kbits/sec
>
> wireless card is
>
>   02:00.0 Network controller: Broadcom Corporation BCM4322 802.11a/b/g/n
> Wireless LAN Controller (rev 01)
>
> bcmwl-kernel-source version 5.60.48.36+bdcom-0ubuntu5
>
> == Regression details ==
> Discovered in version: maverick
> Last known good version: lucid
>
> ProblemType: Bug
> DistroRelease: Ubuntu 10.10
> Package: linux-image-2.6.35-22-generic 2.6.35-22.33
> Regression: Yes
> Reproducible: Yes
> ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
> Uname: Linux 2.6.35-22-generic x86_64
> NonfreeKernelModules: nvidia wl
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
> Architecture: amd64
> ArecordDevices:
>  **** List of CAPTURE Hardware Devices ****
>  card 0: NVidia [HDA NVidia], device 0: Cirrus Analog [Cirrus Analog]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> AudioDevicesInUse:
>  USER PID ACCESS COMMAND
>  /dev/snd/controlC0: laney 1558 F.... pulseaudio
> CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
> Card0.Amixer.info:
>  Card hw:0 'NVidia'/'HDA NVidia at 0xd3480000 irq 23'
>    Mixer name : 'Nvidia MCP89 HDMI'
>    Components : 'HDA:10134206,106b0d00,00100301
HDA:10de000c,10de0101,00100200'
>    Controls : 28
>    Simple ctrls : 12
> Date: Wed Sep 29 11:06:53 2010
> HibernationDevice: RESUME=UUID=1c5b3f2c-2c89-4fa1-9ed8-0e238de8fe47
> InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64
(20100729)
> MachineType: Apple Inc. MacBookPro7,1
> ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic
root=UUID=2228fdfe-3834-40b2-b7b4-efea7463e3c1 ro quiet splash reboot=pci
> ProcEnviron:
>  PATH=(custom, user)
>  LANG=en_GB.UTF-8
>  SHELL=/usr/bin/zsh
> RelatedPackageVersions: linux-firmware 1.38
> RfKill:
>
> SourcePackage: linux
> dmi.bios.date: 03/25/10
> dmi.bios.vendor: Apple Inc.
> dmi.bios.version: MBP71.88Z.0039.B05.1003251322
> dmi.board.name: Mac-F222BEC8
> dmi.board.vendor: Apple Inc.
> dmi.chassis.type: 10
> dmi.chassis.vendor: Apple Inc.
> dmi.chassis.version: Mac-F222BEC8
> dmi.modalias:
dmi:bvnAppleInc.:bvrMBP71.88Z.0039.B05.1003251322:bd03/25/10:svnAppleInc.:pnMacBookPro7,1:pvr1.0:rvnAppleInc.:rnMac-F222BEC8:rvr:cvnAppleInc.:ct10:cvrMac-F222BEC8:
> dmi.product.name: MacBookPro7,1
> dmi.product.version: 1.0
> dmi.sys.vendor: Apple Inc.
>
> --
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (654972).
> https://bugs.launchpad.net/bugs/651008
>
> Title:
> Regression in wireless performance under Maverick when on battery
> power (broadcom)
>
> Status in The Linux Kernel:
> Confirmed
> Status in “bcmwl” package in Ubuntu:
> Confirmed
> Status in “linux” package in Ubuntu:
> New
> Status in “bcmwl” source package in Maverick:
> Confirmed
> Status in “linux” source package in Maverick:
> New
>
> Bug description:
> [WORKAROUND]
> (This will not fix all problems for all: see comment 24.)
> 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
>
> [ORIGINAL REPORT]
> Since upgrading to maverick, wireless performance on my Macbook Pro 7.1
has been terrible. It was fine under lucid.
>
> Pinging the router:
>
>   13 packets transmitted, 12 received, 7% packet loss, time 12024ms
>   rtt min/avg/max/mdev = 52.867/574.644/1203.660/441.552 ms, pipe 2
>
> iperf to another machine connected via ethernet over power (typical
> latency from this machine is ~3ms to router)
>
>   [ ID] Interval Transfer Bandwidth
>   [ 3] 0.0-10.0 sec 136 KBytes 111 Kbits/sec
>
> wireless card is
>
>   02:00.0 Network controller: Broadcom Corporation BCM4322
> 802.11a/b/g/n Wireless LAN Controller (rev 01)
>
> bcmwl-kernel-source version 5.60.48.36+bdcom-0ubuntu5
>
> == Regression details ==
> Discovered in version: maverick
> Last known good version: lucid
>
> ProblemType: Bug
> DistroRelease: Ubuntu 10.10
> Package: linux-image-2.6.35-22-generic 2.6.35-22.33
> Regression: Yes
> Reproducible: Yes
> ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
> Uname: Linux 2.6.35-22-generic x86_64
> NonfreeKernelModules: nvidia wl
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
> Architecture: amd64
> ArecordDevices:
>  **** List of CAPTURE Hardware Devices ****
>  card 0: NVidia [HDA NVidia], device 0: Cirrus Analog [Cirrus Analog]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> AudioDevicesInUse:
>  USER PID ACCESS COMMAND
>  /dev/snd/controlC0: laney 1558 F.... pulseaudio
> CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
> Card0.Amixer.info:
>  Card hw:0 'NVidia'/'HDA NVidia at 0xd3480000 irq 23'
>    Mixer name : 'Nvidia MCP89 HDMI'
>    Components : 'HDA:10134206,106b0d00,00100301
HDA:10de000c,10de0101,00100200'
>    Controls : 28
>    Simple ctrls : 12
> Date: Wed Sep 29 11:06:53 2010
> HibernationDevice: RESUME=UUID=1c5b3f2c-2c89-4fa1-9ed8-0e238de8fe47
> InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64
(20100729)
> MachineType: Apple Inc. MacBookPro7,1
> ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic
root=UUID=2228fdfe-3834-40b2-b7b4-efea7463e3c1 ro quiet splash reboot=pci
> ProcEnviron:
>  PATH=(custom, user)
>  LANG=en_GB.UTF-8
>  SHELL=/usr/bin/zsh
> RelatedPackageVersions: linux-firmware 1.38
> RfKill:
>
> SourcePackage: linux
> dmi.bios.date: 03/25/10
> dmi.bios.vendor: Apple Inc.
> dmi.bios.version: MBP71.88Z.0039.B05.1003251322
> dmi.board.name: Mac-F222BEC8
> dmi.board.vendor: Apple Inc.
> dmi.chassis.type: 10
> dmi.chassis.vendor: Apple Inc.
> dmi.chassis.version: Mac-F222BEC8
> dmi.modalias:
dmi:bvnAppleInc.:bvrMBP71.88Z.0039.B05.1003251322:bd03/25/10:svnAppleInc.:pnMacBookPro7,1:pvr1.0:rvnAppleInc.:rnMac-F222BEC8:rvr:cvnAppleInc.:ct10:cvrMac-F222BEC8:
> dmi.product.name: MacBookPro7,1
> dmi.product.version: 1.0
> dmi.sys.vendor: Apple Inc.
>
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