WRT54G v1.0 and connection issues with Centrino based laptop

Discussion in 'HyperWRT Firmware' started by Siem, Mar 6, 2005.

  1. Siem

    Siem Network Guru Member

    Hi all,

    I recently bought a Centrino based laptop. It has a Intel 2200BG NIC running with the latest driver (v9). I am using a WRT54G v1.0 with HyperWRT 1.3 firmware to connect to the Internet.

    Now here's the issue: My connection keeps throttling down to 1-12 Mbps all the time. Also when heavily surfing. Transfers then become dead slow.

    I have already implemented the usual tweak by setting the NIC to maximum performance. I read somewhere that it has to do with the Power Save Polling feature of the Centrino system. The Linksys router would not be able to cope with this and let´s the NIC throttle back to low speeds.

    My other laptop with a version 1 WPC54G always runs at full 54 Mbps speed. Both lappies are on AC power, and configured for max performance on AC.

    Is there a solution for this issue with the version 1.0 WRT54G. Later versions seem to be Centrino certified, but the first version is not?

    Appreciate your help.

    Greetz, Siem
  2. Toxic

    Toxic Administrator Staff Member

    have you tried the latest version of firmware?

  3. Siem

    Siem Network Guru Member

    Hi Simon,

    I just installed the 2.1b1.
    First feeling is that it got much better. The laptop NIC seems to be reacting snappier. It still throttles down at low usage, but it picks up very fast when usage becomes heavier.
    Hopefully, intel brings out a new driver for the 2200BG in which this power save polling can be switched off entirely.
    I don't want to give up on my v1 just yet, because it has been running flawless for nearly two and a half years now (24/7 !!). :D

    Greetz, Maurice
  4. Toxic

    Toxic Administrator Staff Member

    try playing with the settings in the wrt54g:

    Adjusting the "RTS Threshold" can help alleviate Packet loss. If one of the Wireless computers can obtain an IP address but can not ping, then set the "RTS Threshold" to 2304

    Adjusting the "Beacon Interval" can help association problems. If there is a wireless adapter that is able to see the access point, but is unable to get locked, try adjusting the "Beacon Interval" to 50

    Adjusting the "Fragmentation Threshold" can help association problems. If there is a wireless adapter that is able to see the access point, but is unable to get locked, try adjusting the "Fragmentation Threshold" to 2304

    If you have just one or two clients enabling frameburst will help. Make sure CTS is disabled. (WRT54G/GS only) this speeds up throughput slightly
  5. Siem

    Siem Network Guru Member

    My conclusion seemed to be a little early. :(
    I've found that the wireless NIC still reduces speed. It goes down steady from 54, 48, 24, ... 1 Mbps. It does this also under normal use. It take some "heavy surfing" or downloading to bring it up to speed again (or awaken it). Sometimes I need to open some extra IE windows in order to get to full steam again.
    Also playing around with the settings doesn't bring it. Setting the beacon interval down to 1 didn't help. The other settings also do not influence the behaviour.

    According to the NIC settings it is at CAM (Continuously Awake Mode), slider at max. performance, but it sure doesn't act like that. The router just isn't capable of keeping the NIC alive.

    Any other ideas :?:
  6. muenstereifel

    muenstereifel Network Guru Member

    which intel proset-utility do you use? . . . i have had the very same probs using intel proset 9.X.
    now that i'm using intel proset 8.X it works just like it shouls. ;)
    maybe you try this . . .
  7. Siem

    Siem Network Guru Member

    Thanks, didn't try that yet. I am downloading it right now and i'll give a try.
    Will post the results.

    Greetz, Maurice
  8. muenstereifel

    muenstereifel Network Guru Member

    which version of intel-proset do you use? . . . this is the version i am using atm. :)
  9. Siem

    Siem Network Guru Member

    :D :D :D :D :D

    I installed the same version about half an hour ago. Since then the speed didn't drop at all. Also when i left the machine alone for 5 minutes. With the verssion 9 driver the connection would have gone to sleep already.
    Now constant 54 Mbps at excellent signal strength.

    So after all the good old WRT54G was not to blame.
    The driver for the wireless NIC did the trick.

    THANKS VERY MUCH! :lol: Almost crying of happiness.

    Leaving the laptop alone for 10 minutes makes the Wireless NIC go to sleep, that is 1 Mbps. But opening a link or IE windows awakens the connection right back to 54 Mbps. Very digital behaviour as compared to the version 9 driver, where the speed gradually went down, and took long time get up to max again step by step. Getting back to full 54 Mbps was in most cases impossible. With version 8 I see only two speeds: either minimum (1) or maximum (54). Great stuff this "old"driver.

    One day later and several reboots, it still works. No issues with connection speeds anymore. Full speed available when needed.

    Greetz, Maurice
  10. Oh my GOD this is the EXACT problem I am having with my WRT54GS 1.0 and V2030US laptop with the exact same intel network card as yours. I am going to try it RIGHT NOW
  11. Siem

    Siem Network Guru Member


    Try installing the old driver only. Wait with firmware update.
    I still do not know whether it was the combination of new router firmware + the driver, or that it was just the driver.

    Anyway, be carefull with the firmware update. It has risks. Be sure to read the instructions.

    Greetz, Siem
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