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Thread: Wireless drops : Atheros Communications Inc. AR9285/Ubuntu 12.04/Asus N53SM

  1. #1
    Join Date
    Aug 2012

    Exclamation Wireless drops : Atheros Communications Inc. AR9285/Ubuntu 12.04/Asus N53SM

    At unpredictable intervals my laptop drops its wireless. Initially it will continue to try to connect to the network and ask for the password, but eventually gives up. When I select the network icon, under Wireless Networks is says "device not ready".
    Restarting returns the wireless, but randomly it shuts down again.
    This has only been happening for about 2 weeks.
    This system is dual-boot with Windows 7 (for gaming) and I do not have the same wireless issues within windows.
    Below I'm including the suggested output and information.
    Thanks for your help,

    System: Asus N53SM laptop
    Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
    When dropped, ifconfig returns no wireless
    iwconfig returns:
    wlan0 IEEE 802.11bgn ESSIDff/any
    Mode:Managed Access Point: Not-Associated Tx-Power=16 dBm
    Retry long limit:7 RTS thrff Fragment thrff
    Power Managementff

    lsmod | grep "wlan_module_name" returns nothing

    dmesg returns the following:
    [ 3523.854471] ath: Failed to stop TX DMA, queues=0x10f!
    [ 3523.867927] ath: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
    [ 3523.867930] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up
    [ 3523.987634] ath: Chip reset failed
    [ 3523.987638] ath: Unable to reset channel (2437 MHz), reset status -22
    [ 3525.497317] ath: Failed to wakeup in 500us

    and basically repeats the wakeup and additional attempts.

    sudo lshw -C network
    *-network DISABLED
    description: Wireless interface
    product: AR9285 Wireless Network Adapter (PCI-Express)
    vendor: Atheros Communications Inc.
    physical id: 0
    bus info: pci@0000:03:00.0
    logical name: wlan0
    version: 01
    serial: 00:08:ca:34:58:4a
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress cap_list ethernet physical wireless
    configuration: broadcast=yes driver=ath9k driverversion=3.2.0-35-generic-pae firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
    resources: irq:17 memory:ddc00000-ddc0ffff

    iwlist scan
    wlan0 Failed to read scan data : Network is down

    lsb_release -d
    Description: Ubuntu 12.04.1 LTS

    sudo /etc/init.d/networking restart
    * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
    * Reconfiguring network interfaces...

  2. #2
    Join Date
    Aug 2012

    Re: Wireless drops : Atheros Communications Inc. AR9285/Ubuntu 12.04/Asus N53SM

    Update: realized that it IS happening in Windows 7 as well. The big difference is that in Windows I can click on the broken wifi icon and tell it to fix the situation, which apears to be restarting the wireless adapter. It's a temporary fix, but better than asus telling me I have to send it in, that they will likely do an OS recovery (pretty much screwing up my months and months of setup for the dual boot system.

    BUT... I do not see any comparable method in linux/ubuntu. It's like a hardware kickstart or something. Is there something similar in linux?

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