WRT54G: frequent discon n then instant reconnect, need help!

Discussion in 'Cisco/Linksys Wireless Routers' started by skyeternity, Dec 29, 2004.

  1. skyeternity

    skyeternity Network Guru Member

    hey everyone,

    I just bought a new WRT54G about a week ago and i'm having some problems with it...

    I hooked everything up properly (i'm assuming) and my problem is that the computer that is on the wireless network (with a WMP54G: the PCI one) often disconnects from the network.. then instantly reconnects to the network again. Sometimes this would happen in half an hour.. if it lasts long, it goes for an hour or as fast as every 10 mins.. the router and the wireless card is about 3 floors away.

    I was using old windows driver for the pci card and this problem didn't exist.. but signal is always low or good.. mostly low.. it's unbearable..

    so i updated to new drivers from linksys and signal is better.. but this problem started...

    i went to windowsupdate to get a even newer cisco-linksys driver.. signal goes to excellent! but the problem magnifies.. so what is the problem? any help would be greatly appreciated.

    here are some specs of the setup:

    win xp pro with sp1 (heard there were problems for wireless w/ sp2)
    router firmware version is v3.01.3 with HyperWRT 2.0b3
    security is on WEP 64bits
    network is on G-only on channel 3 n' mac filter disabled
    all advanced settings on default except:
    -beacon interval @ 50
    -frag threshold @2304
    -and transmit power @ 83%

    i play a lot of online gaming and this frequent disconnect pretty much kills my game.. so any help would be GREAT! thx ahead of time.

  2. Esquire

    Esquire Mesquire Staff Member Member

    What was the router firmware version before you updated to HyperWRT?
    And what was the "old" driver you used for your WMP54G?

    I'm not using the newer HyperWRT firmwares, but are you sure you boosted the signal to 83%, and not 83mW?
    Did you measure the S/N ratio throughout the change? (you can use NetStumbler for that)
  3. franzius

    franzius Network Guru Member


    Try this technique. It worked for me and might work for you.
    1) Uninstall you wireless card from Device Manager.
    2) Shut down windows
    3) Start again and let the system re-install the card.
    4) Use the latest driver that you have already downloaded for the card.

    That should do it.

    I had the same problem with a brand new laptop and brand new desktop. I tried everything you did. I even reinstalled the OS. There was no improvement until I applied the technique above. Since that time both machines have not dropped connection once.

    It seems that the drivers were not installed correctly by windows the first time around. Don't ask me why or how that's possible, I could not tell you.

    Give it a try and report back!!!

  4. skyeternity

    skyeternity Network Guru Member

    hey guys.. thx in advance for helping me out

    in reply to esquire:

    when i first got the router..the firmware was the default firmware (someting like 2.02) and i upgraded the linksys firmware to v3.01.3 THEN
    upgraded to HyperWRT 2.0b3.. after upgrading the original firmware first..

    the "old" drivers that i was talkin about for WMP54G pci card was the generic drivers that the windows had on the hard-drive..

    and im sure the transmit power is at 83% which is 63mW and i've tried all of the different antenna strength and the problem is still there

    lastly, i do not know what the "S/N" ratio you are refering to so i haven't checked it yet.. is it something to do w/ signal?

    in reply to franzius:

    I will try that in a few hours time and get back to you ASAP
    however i have a feeling it's not going to work because i've tried uninstalling the device and installing it again.

  5. jamie3

    jamie3 Network Guru Member

    SNR refers to the signal to noise ratio.
    the noise refers to the external entities that can disrupt your signal.
    the SNR characterises the amount of power in decibals (dB) which the signal strength exceeds the noise strength.

    if your noise power is much larger than your signal power then you are going to have a lot of interference.

    the ratio is defined as (if i recall):

    signal power / noise power
  6. cbrunnkvist

    cbrunnkvist Network Guru Member

    I experience similar problems both when using WPA-PSK as well as WEP.
    I switched off all the security stuff, and let the router just use wireless MAC filtering, but that is totally unaccaptable - I bought this model because if featured WPA mode...

    My WRT54G was bought in Dec. 2004 too. I use the original firmware -- refer to my posting concerning fw. versions at http://www.linksysinfo.org/modules.php?name=Forums&file=viewtopic&p=7881#7881

    I've contacted Linksys support through e-mail but I've had no helpful respnse as of yet. :(
  7. jdepew

    jdepew Administrator Staff Member Member

    Twice today I've posted the same solution, lets see if it works for you too! :D

    Especially if you are running Windows XP on the wireless computers, try changing the Beacon to 50 from the default 100 on the router. That should help with the frequent dis/reconnects.

    Let us know if it works for you. I believe this issue was corrected in the 3.x series of firmware... but you never know.
  8. jdepew

    jdepew Administrator Staff Member Member

    Here's my original post on it with details:

    Change the Wireless > Advanced Wireless >Beacon Interval to 50. The default it 100. This has been shown to improve connection stability when using wireless clients and Windows XP's Zero Config utility. Let us know how it works for you.

  9. wbgookin

    wbgookin Network Guru Member

    Is Windows XP "competing" with the updated PCI driver to see who should configure the wireless connection? I had a client who'd ended up with that, and his wireless kept disconnecting/reconnecting at random intervals.

    If your driver is set up to configure the connection, try disabling the windows setting "Use Windows to configure my wireless network settings".

    Maybe that'll work...
  10. skyeternity

    skyeternity Network Guru Member

    hey everyone, thanks again for all these suggestions

    hey Bill: The problem taht you are suggestings is possible BUT i don't know where i can disable the "Use Windows to configure my wireless network settings" setting so you have to reply n' help me out there...

    hey Jill: Yes i do already have the 3.xx firmware AND as i mentioned b4.. i already have my beacon interval configured to 50 instead of 100.. so this shouldn't be a problem

    and to cbrunnkvist: I called linksys support too and apparently they told me to hotwire the computer to the router and run the netcheck utility @ http://www.linksysfix.com/check (whiched installed some different drivers) but that didn't help either.. so i don't know what to do!

    thx every1 for the replies/suggestions/and those who post about their problem too

  11. wbgookin

    wbgookin Network Guru Member

    To disable the "Use Windows to configure my wireless network settings", you need to get to the "Wireless Network Connect Properties" screen. I get to it one of 2 ways:

    1. By right clicking the wireless icon in the system tray and selecting "Open Network Connections". Then right click the wireless adapter, and select "Properties". The "Use Windows...." is on the "Wireless Networks" tab.

    2. By right clicking the wireless icon and selecting "View available wireless networks." Click on "Change Advanced Settings" (on the left side of the screen), and the "Use Windows..." is on the "Wireless Networks" tab.

    Boy, after all that writing, I sure hope it works! *laugh*

  12. Esquire

    Esquire Mesquire Staff Member Member

    I'm pretty sure Windows doesn't have a generic driver for WMP54G. Make sure you are using the latest driver from Linksys. In your Windows Device Manager, your WMP54G should say something like Wireless-G PCI adapter.


    S/N ratio (signal to noise ratio) is a way to measure the quality of an analog signal. If you download the Netstumbler tool it will provide the necessary info for you to gauge the quality of your signal.

    If you are using your adapter's own Wireless Connection Manager, you may need to even disable XP's own Wireless Zero Configuration.

    Control Panel > Administrative Tools > Services
    Scroll down and double-click Wireless Zero Configuration and change its Startup type to Disabled, followed by clicking the [Stop] button to terminate the current process.
  13. skyeternity

    skyeternity Network Guru Member

    Well Esquire, the problem is that I don't know If im using the WMP54G's connection manager or not... The adapter's connection manager is utility that linksys provides in the driver package (that has a green interface), am i correct? Or the "connection manager" is the advanced settings in:

    View available Wireless networks --> advanced ----> general ----> adapter configuration ----> advanced.

    Should those settings be ignored or what??

    And the current situation is: Still have Windows Zero configuration on, I believe i'm not using the adapter's connection manager, and updated to most recent drivers, and it still disconnects once in awhile.

  14. Esquire

    Esquire Mesquire Staff Member Member

    I think you are using the Linksys WCM. This is what the Wireless Zero Configuration (WZC) should look like.

    (first one is Windows XP pre-SP2)

    Disable WZC service if you don't use it - it also frees up some RAM and speedup boot a tiny bit as a benefit :wink:
  15. skyeternity

    skyeternity Network Guru Member

    Okey esquire then I'm sure now that I'm only using that WZC because my windows is pre-SP2 and it looks exactly like your first screenshot.

    and I have nothing else that configures my linksys PCI card therefore there shouldn't be a conflict.

    so now what? =(

  16. Esquire

    Esquire Mesquire Staff Member Member

    Just notice you are using WEP. Have you unticked the Enable IEEE 802.1x Authentication for this network setting? You can untick it from within your existing network connection setup.


    Hope this helps.

    PS. In case you have disabled the above previously, and since you are using a PCI card behind a desktop computer, here's a question: how have you placed your computer in the room and where is the antenna relative to it all, e.g., is it on the floor or underneath a desk? The PCI adapters I'm using don't like being hidden underneath the desks up against the wall :roll:

    Radio signal can be a tricky and sensitive beast, which was why in an earlier reply I recommended using NetStumbler to get a S/N ratio reading of the signal the adapter was receiving. A boosted signal may not equate to better quality, so it helps to measure it quantitatively. In fact, with the very first version of HyperWRT, Avenger stated this as the very reason when asked why he defaulted the transmission strength to a value of 42(mW) - too strong a boost and the signal can become "dirty".
  17. moracca

    moracca Guest

    I was having the same problem. I simply uninstalled linksys's drivers and their configuration utility, reinstalled ONLY the drivers, and allowed windows to configure my settings. Seems to have taken care of the problem, so I guess that was my issue. I suppose it would have worked equally well to disable windows auto-configuration and just use linksys's utility, but i'd rather use XP's anyhow


    edit: also, netstumbler is reporting my SNR as 35 (signal is -65, noise is -100). Is this a good value? or should I attempt to strengthen my signal or reduce noise? Windows is reporting my wireless connection's speed as 54mbps so I guess it's alright, right?
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