Bug 23942

Summary: Regression in wireless performance under Maverick when on battery power (broadcom)
Product: Drivers Reporter: njin (marconifabio)
Component: StagingAssignee: drivers_staging (drivers_staging)
Status: RESOLVED OBSOLETE    
Severity: normal CC: alan, linville
Priority: P1    
Hardware: All   
OS: Linux   
URL: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/651008
Kernel Version: 2.6.35.22 to 2.6.37-6 Subsystem:
Regression: Yes Bisected commit-id:

Description njin 2010-11-28 21:33:59 UTC 
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.
Comment 1 John W. Linville 2010-12-10 14:19:06 UTC 
Do regressions in staging drivers even count?
Comment 2 Greg Kroah-Hartman 2010-12-10 17:47:04 UTC 
On Fri, Dec 10, 2010 at 02:19:12PM +0000, bugzilla-daemon@bugzilla.kernel.org wrote:
> Do regressions in staging drivers even count?

Not really.
Comment 3 Rafael J. Wysocki 2010-12-10 21:06:51 UTC 
Yeah, I didn't realize it was staging, sorry.