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Thread: Speed degredation of Ralink RT2860 based wireless card in Natty

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  1. #1
    Join Date
    Oct 2009
    Location
    Brisbane
    Beans
    35
    Distro
    Ubuntu 11.04 Natty Narwhal

    Exclamation Speed degredation of Ralink RT2860 based wireless card in Natty

    Hi Guys and Girls,

    Just wondering if anyone else has noticed a significant drop in speed from their RT2860 based wireless cards?

    I'm not sure if this is just an isolated problem on my end, so here's a bit more information.

    I have installed the Natty daily build snapshot from the 2nd of April with Kernel version 2.6.38-7-generic, and compared speeds (using speedtest.net) to my existing install of Maverick with Kernel version 2.6.35-22-generic; and I must admit, the results are surprising!

    Maverick Results:


    Natty Results:


    Both results were taken within 4 minutes of each other and can be completely replicated over and over.

    Using lspci for both Maverick and Natty, return the Ralink RT2860 chipset:
    Code:
    lspci | grep "Ra"
    Also, the network managers report that the kernel is booting the "rt2860" driver for Maverick and the "rt2800pci" driver for Natty.
    It should also be noted that to make the RT2860 driver work properly in Maverick, I've had to blacklist the following drivers (as outlined here).
    blacklist rt2800pci
    blacklist rt2800usb
    blacklist rt2x00lib
    blacklist rt2x00pci
    blacklist rt2x00usb
    And a quick "sudo lshw -C network" for more info...
    Maverick:
    *-network
    description: Wireless interface
    product: RT2860
    vendor: RaLink
    physical id: 0
    bus info: pci@0000:03:00.0
    logical name: wlan0
    version: 00
    serial: 70:71:bc:f0:30:e1
    width: 32 bits
    clock: 33MHz
    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
    configuration: broadcast=yes driver=rt2860 ip=192.168.1.103 latency=0 multicast=yes wireless=Ralink STA
    resources: irq:19 memory:f2000000-f200ffff
    Natty:
    *-network
    description: Wireless interface
    product: RT2860
    vendor: Ralink corp.
    physical id: 0
    bus info: pci@0000:03:00.0
    logical name: wlan0
    version: 00
    serial: 70:71:bc:f0:30:e1
    width: 32 bits
    clock: 33MHz
    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
    configuration: broadcast=yes driver=rt2800pci driverversion=2.6.38-7-generic firmware=0.11 ip=192.168.1.103 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
    resources: irq:19 memory:f2000000-f200ffff
    For the moment, I'd like to see whether anyone else can shed light or sympathise in the situation before I consider submitting a regression bug (which I've never done before ).
    Last edited by Akavashi; April 5th, 2011 at 04:22 PM. Reason: Added in extra card details through lshw.

  2. #2
    Join Date
    Oct 2009
    Location
    Brisbane
    Beans
    35
    Distro
    Ubuntu 11.04 Natty Narwhal

    Wink Re: Speed degredation of Ralink RT2860 based wireless card in Natty

    Upon further investigation... Blacklisting the aforementioned results in using the rt2860 driver, which still works within Natty and results in a significant improvement in speed.

    I guess they're still in development with the new drivers.

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