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Thread: Problem with Realtek RTL8187, no access point associated.

  1. #1
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    Default Problem with Realtek RTL8187, no access point associated.

    Hello. I am having trouble getting my wireless card to connect to any access points. Specifically, I am attempting to use a Realtek RTL8187 with my Android phone as an access point. Incidentally, I am using another Linux machine with no problem. I am brand new to this forum and to Linux. Please forgive me in advance if it takes me a bit to understand what may seem basic.

    I hope the following information may help you to help me.

    My card's kernel driver is rtl8187. I am unaware if I need to install any other firmware as "dmesg | grep firmware" gives no output.

    As far as encryption, I am using WPA2 PSK with passphrase. I have checked the ESSID and passphrase many times in Network Connections and Network Settings.

    I understand I am supposed to make sure wpa_supplicant is installed, but I don't know what it is or how to make sure it is installed..

    Some other commands I hope are useful, (I have amended their results):

    Ron@linux-eyro:~> /usr/sbin/iwconfig

    lo no wireless extensions.

    eth0 no wireless extensions.

    wlan0 IEEE 802.11bg ESSID:off/any
    Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
    Retry long limit:7 RTS thr:off Fragment thr:off
    Power Management:off

    linux-eyro:~ # sudo /usr/sbin/iwlist scan

    lo Interface doesn't support scanning.

    eth0 Interface doesn't support scanning.

    wlan0 No scan results

    dmesg

    [ 6.184307] phy0: hwaddr 00:e0:4c:06:40:9f, RTL8187vB (default) V1 + rtl8225, rfkill mask 2
    [ 6.195044] rtl8187: Customer ID is 0x00
    [ 6.195085] Registered led device: rtl8187-phy0::radio
    [ 6.195113] Registered led device: rtl8187-phy0::tx
    [ 6.195142] Registered led device: rtl8187-phy0::rx
    [ 6.196038] rtl8187: wireless switch is on
    [ 6.196088] usbcore: registered new interface driver rtl8187
    [ 6.804139] scsi 4:0:0:0: Direct-Access Novatel MMC Storage 2.31 PQ: 0 ANSI: 2

    dmesg | less

    [ 2.907028] usb 1-7: Product: RTL8187_Wireless
    [ 2.907029] usb 1-7: Manufacturer: Manufacturer_Realtek_RTL8187_
    [ 2.907031] usb 1-7: SerialNumber: 00E04C06409F

    I have many hours into figuring this out, so I really appreciate any help you may offer.

    Ron

  2. #2
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    Quote Originally Posted by RandomRon View Post
    I understand I am supposed to make sure wpa_supplicant is installed, but I don't know what it is or how to make sure it is installed..
    I think this command is sufficient to check this :
    Code:
    rpm -qi wpa_supplicant
    But I really don't think that wpa_supplicant affects the results of iwlist scan. Quoting wiki :
    wpa_supplicant is a free software implementation of an IEEE 802.11i
    My guess is You don't have the proper driver for your card but I don't know what exactly You should install. I'm sure someone here will guide You or You could also search through the forms because I think the information You seek is somewhere here. It my also be that your radio is off. So be sure to check it as well.
    Quote Originally Posted by lwfinger
    If the "Enable Wireless" button is disabled, then you have an rfkill problem.
    Install rfkill with "sudo zypper in rfkill" and use the command "rfkill list".
    If hard blocked is set, that is the problem. To solve it, you need to switch the
    radio on. As you didn't say anything about your machine, I cannot help you any
    further.
    Best regards,
    Greg
    Best regards,
    Greg

  3. #3
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    Thanks, Greg for your quick response! It appears I did have Wpa_supplicant installed. I have downloaded the newest driver from Realtek, but I am still trying to figure out how to install it. The latest openSuse it is supposed to support 10, i am using 11.3. Pardon my ignorance, but how does one turn on the radio button? If any other system info is needed, I would be glad to provide it.


    Quote Originally Posted by glistwan View Post
    I think this command is sufficient to check this :
    Code:
    rpm -qi wpa_supplicant
    But I really don't think that wpa_supplicant affects the results of iwlist scan. Quoting wiki :
    My guess is You don't have the proper driver for your card but I don't know what exactly You should install. I'm sure someone here will guide You or You could also search through the forms because I think the information You seek is somewhere here. It my also be that your radio is off. So be sure to check it as well.


    Best regards,
    Greg

  4. #4
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    Default Re : Re: Problem with Realtek RTL8187, no access point associated.

    Hi,

    Check if the driver is installed :

    Code:
    rpm -qa | grep rtl8187
    If not, the driver is available here in the wireless repo : Index of /repositories/driver:/wireless/openSUSE_11.3. Just chose your arch and download if needed.

  5. #5
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    On 01/20/2011 11:36 AM, RandomRon wrote:
    >
    > Thanks, Greg for your quick response! It appears I did have
    > Wpa_supplicant installed. I have downloaded the newest driver from
    > Realtek, but I am still trying to figure out how to install it. The
    > latest openSuse it is supposed to support 10, i am using 11.3. Pardon
    > my ignorance, but how does one turn on the radio button? If any other
    > system info is needed, I would be glad to provide it.


    There should be no reason to build the driver for the RTL8187L or RTL8187B from
    the Realtek web site. The correct driver is rtl8187, which is built into the
    kernel for a long time.

    There is no radio button for the RTL8187L; however if your system has a
    different wifi card that does have a switch, that switch being off will kill ALL
    the radios, including the RTL8187.

    Please post the output of the following commands:

    Code:
    lsmod | grep rtl
    /usr/sbin/rfkill list
    sudo /usr/sbin/iwlist scan
    If the rfkill line says "command not found", then you will need to

    sudo zypper in rfkill

    WITH the network enabled.



  6. #6
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    On 01/20/2011 03:36 PM, DaaX wrote:
    >
    > Hi,
    >
    > Check if the driver is installed :
    >
    >
    > Code:
    > --------------------
    > rpm -qa | grep rtl8187
    > --------------------
    >
    >
    > If not, the driver is available here in the wireless repo : 'Index of
    > /repositories/driver:/wireless/openSUSE_11.3'
    > (http://tinyurl.com/2vezxtw). Just chose your arch and download if
    > needed.


    This test will fail as that driver is part of the standard kernel. What will
    show it is

    find /lib/modules -name rtl8187.ko

  7. #7
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    Default Re : Re: Problem with Realtek RTL8187, no access point associated.

    Quote Originally Posted by lwfinger View Post
    On 01/20/2011 03:36 PM, DaaX wrote:
    >
    > Hi,
    >
    > Check if the driver is installed :
    >
    >
    > Code:
    > --------------------
    > rpm -qa | grep rtl8187
    > --------------------
    >
    >
    > If not, the driver is available here in the wireless repo : 'Index of
    > /repositories/driver:/wireless/openSUSE_11.3'
    > (Index of /repositories/driver:/wireless/openSUSE_11.3). Just chose your arch and download if
    > needed.


    This test will fail as that driver is part of the standard kernel. What will
    show it is

    find /lib/modules -name rtl8187.ko
    I didn't know the driver is part of the kernel. How can someone know it is included in the kernel ?

  8. #8
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    On 01/21/2011 12:06 PM, DaaX wrote:
    >
    > I didn't know the driver is part of the kernel. How can someone know it
    > is included in the kernel ?


    The "find" command in the previous posting of mine will show it. Another way
    would be

    zcat /proc/config.gz | grep 8187

    I know because I helped put it there in 2008.


  9. #9
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    There should be no reason to build the driver for the RTL8187L or RTL8187B from
    the Realtek web site. The correct driver is rtl8187, which is built into the
    kernel for a long time.

    There is no radio button for the RTL8187L; however if your system has a
    different wifi card that does have a switch, that switch being off will kill ALL
    the radios, including the RTL8187.

    Please post the output of the following commands:

    Code:
    lsmod | grep rtl
    /usr/sbin/rfkill list
    sudo /usr/sbin/iwlist scan
    If the rfkill line says "command not found", then you will need to

    sudo zypper in rfkill

    WITH the network enabled.[/QUOTE]

    Code:
    Ron@linux-eyro:~> lsmod | grep rtl 
    rtl8187                56564  0 
    mac80211              243337  1 rtl8187 
    cfg80211              155663  2 rtl8187,mac80211 
    eeprom_93cx6            1429  1 rtl8187 
    usbcore               192259  7 rtl8187,usb_storage,option,usbserial,uhci_hcd,ehci_hcd 
    Ron@linux-eyro:~> /usr/sbin/rfkill list 
    bash: /usr/sbin/rfkill: No such file or directory 
    Ron@linux-eyro:~> sudo /usr/sbin/iwlist scan 
    root's password: 
    lo        Interface doesn't support scanning. 
    
    eth0      Interface doesn't support scanning. 
    
    wlan0     No scan results
    lwfinger, since rfkill line says "No such file or directory," I need to

    sudo zypper in rfkill

    with the network enabled, correct? As I am not conected to any network from the machine with this issue, how do I enable the network? I appologize for my extreme noobness.

  10. #10
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    Default Re: Problem with Realtek RTL8187, no access point associated.

    [Quote/]
    The "find" command in the previous posting of mine will show it. Another way
    would be

    zcat /proc/config.gz | grep 8187

    I know because I helped put it there in 2008.[/QUOTE]

    Ron@linux-eyro:~> find /lib/modules -name rtl8187.ko
    /lib/modules/2.6.34-12-default/kernel/drivers/net/wireless/rtl818x/rtl8187.ko
    Ron@linux-eyro:~> zcat /proc/config.gz | grep 8187
    CONFIG_RTL8187=m
    CONFIG_RTL8187_LEDS=y
    CONFIG_R8187SE=m

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