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Thread: Wifi wont reconnect after suspend in 12.04

  1. #1
    Join Date
    Jul 2012
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    18

    Wifi wont reconnect after suspend in 12.04

    Every-time I suspend and wake my system, Ubuntu will not reconnect to my AP. The AP is working fine with other devices and also works under 11.10. dmesg reports the following :
    Code:
    [58636.500095] wlan0: direct probe to <mac address>  (try 1/3)
    [58636.700036] wlan0: direct probe to <mac address>  (try 2/3)
    [58636.904303] wlan0: direct probe to <mac address> (try 3/3)
    [58637.104036] wlan0: direct probe to <mac address>  timed out
    Network Manager also repeatedly asks for the AP passphase.

    One clue I've discovered is that if I change the channel number on the AP, 12.04 will reconnect fine, but this is time consuming and hardly a fix! Anyone any ideas what is wrong?

    I'm not sure it ifs related, but Im also seeing huge activity on my wired connection, even though I dont use it and its not plugged in !!
    Attached Images Attached Images

  2. #2
    Join Date
    Jul 2012
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    18

    Re: Wifi wont reconnect after suspend in 12.04

    Can anyone help ? It works fine until I suspend and wake.

    Code:
    > rfkill list all
    0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
    Code:
    > lspci -nnk | grep -iA2 net
    07:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR8131 Gigabit Ethernet [1969:1063] (rev c0)
        Subsystem: Toshiba America Info Systems Device [1179:ff50]
        Kernel driver in use: atl1c
    --
    08:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller [10ec:8172] (rev 10)
        Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8152]
        Kernel driver in use: rtl8192se

  3. #3
    Join Date
    Jul 2012
    Location
    Illinois, USA
    Beans
    509
    Distro
    Ubuntu 12.04 Precise Pangolin

    Post Re: Wifi wont reconnect after suspend in 12.04

    I find suspend is always buggy, no matter what operating system or hardware you're using. I try to stay away from it.

    Nevertheless, let's have a look at your driver and kernel versions. Please post the output of:

    Code:
    uname -r
    Code:
    modinfo rtl8192se
    Kirk

  4. #4
    Join Date
    Jul 2012
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    18

    Re: Wifi wont reconnect after suspend in 12.04

    Code:
    >uname -r
    3.2.0-26-generic
    Code:
    >modinfo rtl8192se
    filename:       /lib/modules/3.2.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192se/rtl8192se.ko
    firmware:       rtlwifi/rtl8192sefw.bin
    description:    Realtek 8192S/8191S 802.11n PCI wireless
    license:        GPL
    author:         Larry Finger    <Larry.Finger@lwfinger.net>
    author:         Realtek WlanFAE    <wlanfae@realtek.com>
    author:         lizhaoming    <chaoming_li@realsil.com.cn>
    srcversion:     DBF9BFEC2956537D0AFADA5
    alias:          pci:v000010ECd00008174sv*sd*bc*sc*i*
    alias:          pci:v000010ECd00008173sv*sd*bc*sc*i*
    alias:          pci:v000010ECd00008172sv*sd*bc*sc*i*
    alias:          pci:v000010ECd00008171sv*sd*bc*sc*i*
    alias:          pci:v000010ECd00008192sv*sd*bc*sc*i*
    depends:        rtlwifi,mac80211
    intree:         Y
    vermagic:       3.2.0-26-generic SMP mod_unload modversions 
    parm:           swenc:Set to 1 for software crypto (default 0)
     (bool)
    parm:           ips:Set to 0 to not use link power save (default 1)
     (bool)
    parm:           swlps:Set to 1 to use SW control power save (default 0)
     (bool)
    parm:           fwlps:Set to 1 to use FW control power save (default 1)
     (bool)
    parm:           debug:Set debug level (0-5) (default 0) (int)

  5. #5
    Join Date
    Jul 2012
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    18

    Re: Wifi wont reconnect after suspend in 12.04

    The module seems to resume fine.

    If I change the channel my AP uses, Ubuntu will connect to my network without any further intervention.

  6. #6
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 16.04 Xenial Xerus

    Re: Wifi wont reconnect after suspend in 12.04

    Try unloading the module prior to suspend and reload on resume. To do this automatically using pm-utils, create the file /etc/pm/config.d/rtl8192se:
    Code:
    sudo gedit /etc/pm/config.d/rtl8192se
    ...add the following content:
    Code:
    SUSPEND_MODULES="rtl8192se"
    ...save the file and try again.

  7. #7
    Join Date
    Jul 2012
    Beans
    18

    Re: Wifi wont reconnect after suspend in 12.04

    Thanks Toz, that does seem to be working. Three suspends and its connected every time. Ill mark the thread as solved!

    Do you happen to know why eth0 is showing huge amount of traffic even when it is disconnected? (See image from Firestarter above)
    Last edited by clivej; July 25th, 2012 at 11:57 AM.

  8. #8
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 16.04 Xenial Xerus

    Re: Wifi wont reconnect after suspend in 12.04

    Quote Originally Posted by clivej View Post
    Thanks Toz, that does seem to be working. Three suspends and its connected every time. Ill mark the thread as solved!
    Glad to hear it worked. Thanks for marking it solved.

    Do you happen to know why eth0 is showing huge amount of traffic even when it is disconnected? (See image from Firestarter above)
    Looks like it might be some sort of bug. What tool are you using to generate those stats?

  9. #9
    Join Date
    Jul 2012
    Beans
    18

    Re: Wifi wont reconnect after suspend in 12.04

    Spoke too soon, its still doing it! It works for suspends less than approx 30min, anything longer still wont connect.

    That shapshot is from Firestarter
    Last edited by clivej; July 25th, 2012 at 04:41 PM.

  10. #10
    Join Date
    Jul 2012
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    18

    Re: Wifi wont reconnect after suspend in 12.04

    Code:
    >ifconfig eth0
    eth0      Link encap:Ethernet  HWaddr *
              UP BROADCAST MULTICAST  MTU:1500  Metric:1
              RX packets:272962351466430 errors:1637774108798580 dropped:545924702932860 overruns:272962351466430 frame:1364811757332150
              TX packets:272962351466430 errors:1091866585734900 dropped:0 overruns:272966646433725 carrier:545933292867450
              collisions:1364833232168625 txqueuelen:1000 
              RX bytes:272962351466430 (272.9 TB)  TX bytes:272962351466430 (272.9 TB)
              Interrupt:48

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