I have the same issue:
~ ❯❯❯ lspci -nn -d 14e4:
02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM57765
Gigabit Ethernet PCIe [14e4:16b4] (rev 10)
02:00.1 SD Host controller [0805]: Broadcom Corporation BCM57765/57785 SDXC/MMC
Card Reader [14e4:16bc] (rev 10)
03:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n
[14e4:4331] (rev 02)
~ ❯❯❯ sudo dmidecode -s system-product-name
MacBookPro8,1
~ ❯❯❯ uname -a
Linux manolito 3.13.0-45-generic #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
~ ❯❯❯ lspci -nnv
03:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n
[14e4:4331] (rev 02)
Subsystem: Apple Inc. AirPort Extreme [106b:00d6]
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at a0600000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: bcma-pci-bridge
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https://bugs.launchpad.net/bugs/1069766
Title:
14e4:4331 Slow transfer speeds with BCM 4331
Status in linux package in Ubuntu:
Expired
Bug description:
The BCM 4331 wireless chip has slow transfer speeds compared to OSX.
I tested by transferring a big file over the wireless between this
machine and a server that is connected to the wireless router by a
wired connection using scp. The transfer speeds are:
OSX upload: 7 MB/s
OSX download: 8.5 MB/s
Linux upload: 800 kB/s
Linux download: 1.9 MB/s
Uploading on Linux is 10 times slower than uploading on OSX. CPU load
is ~14% when downloading in Linux.
The distance between the AP and the laptop was ~5 meters with direct
line of sight between the two. The security used is WPA2.
The only similar symptom I found by web searching is this:
http://ubuntuforums.org/showthread.php?t=1964768&page=2
The workaround given on that page do not work for me.
This is not a regression. The driver for this chipset was added in
Precise and that had the same problem.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-17-generic 3.5.0-17.28
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jpakkane 2017 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Mon Oct 22 14:45:46 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64+mac
(20120220)
MachineType: Apple Inc. MacBookPro8,1
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic
root=UUID=725f2433-59c8-46cc-9c13-ad2e4ad1548d ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.5.0-17-generic N/A
linux-backports-modules-3.5.0-17-generic N/A
linux-firmware 1.95
SourcePackage: linux
UpgradeStatus: Upgraded to quantal on 2012-08-06 (77 days ago)
dmi.bios.date: 01/24/12
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP81.88Z.0047.B27.1201241646
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-94245B3640C91C81
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro8,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-94245B3640C91C81
dmi.modalias:
dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,1:pvr1.0:rvnAppleInc.:rnMac-94245B3640C91C81:rvrMacBookPro8,1:cvnAppleInc.:ct10:cvrMac-94245B3640C91C81:
dmi.product.name: MacBookPro8,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
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