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Date: Fri, 8 Apr 2011 11:42:07 +0200
Message-ID: <BANLkTi=kkBReSDHcCqyTkbHsAgDLiy7okg@mail.gmail.com>
Subject: Re: Questions about rt2800usb
From: Ivo Van Doorn <ivdoorn@gmail.com>
To: Walter Goldens <goldenstranger@yahoo.com>
Cc: Steev Klimaszewski <steev@genesi-usa.com>,
	Jett Chen <jett_chen@ralinktech.com>,
	Larry Finger <Larry.Finger@lwfinger.net>,
	wireless <linux-wireless@vger.kernel.org>
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Sender: linux-wireless-owner@vger.kernel.org
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Hi,

On Fri, Apr 8, 2011 at 11:32 AM, Walter Goldens
<goldenstranger@yahoo.com> wrote:
>> > Here's my vote against removing the rt2870sta from
>> staging. Some longstanding issues with latency and duplicate
>> packets (rt307x) are persistent with rt2800usb, whereas
>> rt2870sta works fine.
>> >
>> > my two cents
>> >
>> > Walter
>>
>> Personally, I've had the opposite (since the patch to
>> disable power
>> management on rt2800usb.)? rt2870sta hasn't been
>> noticeably more
>> stable, and in fact, I tend to see div0 bugs quite often
>> when using
>> it.? That said, I'm using Azurewave rt3070s.
>
> My vote went against only because of this:
> (rt3070 - 148f:3070)
>
> Ping gateway with staging:
>
> PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
> 64 bytes from 192.168.1.1: icmp_req=1 ttl=64 time=4.34 ms
> 64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=4.70 ms
> 64 bytes from 192.168.1.1: icmp_req=3 ttl=64 time=1.61 ms
> 64 bytes from 192.168.1.1: icmp_req=4 ttl=64 time=1.68 ms
> 64 bytes from 192.168.1.1: icmp_req=5 ttl=64 time=1.33 ms
> 64 bytes from 192.168.1.1: icmp_req=6 ttl=64 time=6.57 ms
> 64 bytes from 192.168.1.1: icmp_req=7 ttl=64 time=4.45 ms
> ^C
> --- 192.168.1.1 ping statistics ---
> 7 packets transmitted, 7 received, 0% packet loss, time 6009ms
>
>
> Now pinging gateway with rt2800usb:
> PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
> 64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=647 ms
> 64 bytes from 192.168.1.1: icmp_req=3 ttl=64 time=1590 ms
> 64 bytes from 192.168.1.1: icmp_req=4 ttl=64 time=583 ms
> 64 bytes from 192.168.1.1: icmp_req=5 ttl=64 time=29.2 ms
> 64 bytes from 192.168.1.1: icmp_req=6 ttl=64 time=1674 ms
> 64 bytes from 192.168.1.1: icmp_req=7 ttl=64 time=667 ms
> 64 bytes from 192.168.1.1: icmp_req=7 ttl=64 time=668 ms (DUP!)
> 64 bytes from 192.168.1.1: icmp_req=8 ttl=64 time=1645 ms
> 64 bytes from 192.168.1.1: icmp_req=9 ttl=64 time=637 ms
> 64 bytes from 192.168.1.1: icmp_req=10 ttl=64 time=1.38 ms
> ^C
> --- 192.168.1.1 ping statistics ---
> 10 packets transmitted, 9 received, +1 duplicates, 10% packet loss, time 9032ms
> rtt min/avg/max/mdev = 1.384/814.547/1674.284/588.666 ms, pipe 2
>
>
> Steev, you mentioned there was a fix? Could you please point which patch resolves this?
>
> I'll be glad to drop the staging driver if rt2800usb does not lag anymore.

Try:

iwconfig wlan0 power off

to disable powersaving.

Ivo