Yes, it is a module and yes I did a reboot. I can remember having specified 
minstrel when compiling the kernel instead of pid so perhaps I need to 
reconfigure/recompile the kernel?

----- Original Message ----- 
From: "Hin-Tak Leung" <hintak_le...@yahoo.co.uk>
To: <zd1211-devs@lists.sourceforge.net>; "Ernst J. Oud" 
<ernst...@euronet.nl>
Sent: Saturday, February 13, 2010 11:38 PM
Subject: Re: [zd1211-devs] Problem with MTU > 500


the modprobe line only take effect after unload/reloading the mac80211 
module (i.e. reboot or do modprobe -r then modprobe mac80211), also you need 
to have built mac80211 as a module for this to work. lsmod should list it, 
if it isn't listed, you have it built into the kernel...

I think it is possible to pass parameters to built-in's, but it has to be at 
the boot parameter stage... not sure about the syntax for that, but it is 
possible.

--- On Sat, 13/2/10, Ernst J. Oud <ernst...@euronet.nl> wrote:

> Ok. I tried, apparantly modprobe.conf
> is deprecated. So, I created /etc/modprobe.d/mac80211.conf
> with:
>
> options mac80211
> ieee80211_default_rc_algo=pid
>
> but that doesn't work; dmesg still shows minstrel is used.
>
> Putting the same line in modprobe.conf gives the same
> result; minstrel is still used.
>
> Bit of a newbie here; never changed modprobe.conf, so I am
> unsure whether adding anything to that file still works
> since it is deprecated and if not what the filename in
> /etc/modprobe.d/ should be...
>
> Perhaps it helps to know that the iwconfig output is also
> rather minimal:
>
> wlan0 IEEE 802.11bg ESSID:
> [esside deleted]
> Mode:Managed
> Frequency:2.437 GHz Access Point: [mac address
> deleted]
> Bit Rate=1
> Mb/s Tx-Power=20 dBm
> Retry long
> limit:7 RTS
> thr:off Fragment thr:off
> Encryption key: [key
> deleted]
> Power
> Management:off
> Link Quality:0
> Signal level:0 Noise level:0
> Rx invalid
> nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive
> retries:0 Invalid misc:0 Missed
> beacon:0
>
> So no link quality, signal level and noise level indicated
> and the Bit Rate is not correct; I get speeds that fit with
> 24 Mb/s or higher...
>
> So something weird is happening with this setup here.
>
> Relevant part of dmesg (mac address of AP masked):
>
> usb 1-1: reset high speed USB device using ehci_hcd and
> address 2
> phy0: Selected rate control algorithm 'minstrel'
> zd1211rw 1-1:1.0: phy0
> usbcore: registered new interface driver zd1211rw
> usb 1-1: firmware: requesting zd1211/zd1211b_ub
> usb 1-1: firmware: requesting zd1211/zd1211b_uphr
> zd1211rw 1-1:1.0: firmware version 4725
> zd1211rw 1-1:1.0: zd1211b chip 0ace:1215 v4810 high
> 00-25-86 MAXIM_NEW_RF pa0 -7---
> cfg80211: Calling CRDA for country: DE
> wlan0: direct probe to AP --:--:--:--:--:-- (try 1)
> wlan0: direct probe responded
> wlan0: authenticate with AP --:--:--:--:--:-- (try 1)
> wlan0: authenticated
> wlan0: associate with AP --:--:--:--:--:-- (try 1)
> wlan0: RX AssocResp from --:--:--:--:--:-- (capab=0x411
> status=0 aid=4)
> wlan0: associated
>
> Any clues?
>
> TIA
>
> Ernst
>
> ----- Original Message ----- From: "Hin-Tak Leung" 
> <hintak_le...@yahoo.co.uk>
> To: <zd1211-devs@lists.sourceforge.net>;
> "Ernst J. Oud" <ernst...@euronet.nl>
> Sent: Saturday, February 13, 2010 9:47 PM
> Subject: Re: [zd1211-devs] Problem with MTU > 500
>
>
> Hmm, the default(?) is 1500 - MTU=500 is way too low for
> normal usage.
>
> since zd1211rw is also a mac80211 driver, can you give the
> pid modprobe.conf a try to see if it helps? See 
> http://bugzilla.kernel.org/show_bug.cgi?id=14168
>
> --- On Sat, 13/2/10, Ernst J. Oud <ernst...@euronet.nl>
> wrote:
>
> > L.S.
> >
> > I am running Slackware 13.0 (kernel 2.6.32) on an RDC
> > (=i486 compatible)
> > small embedded system and using a ZD1211b usb stick
> for
> > wlan (client) access
> > using the standard zd1211rw (module). Firmware version
> is
> > 1.4
> >
> > This works fine as long as I specify an MTU
> > smaller than 500 for
> > wlan0.
> >
> > With a larger MTU the connection aborts when sending
> > larger amounts of
> > information, for instance in a telnet session doing an
> ls
> > of a large directory.
> > I can log in and I can do an ls on a small
> > directory...
> >
> > This is not an USB WLAN stick problem; I tried three
> > separate sticks from
> > different vendors and they all exhibit this problem.
> >
> > With an MTU of say 448, wlan speed is half of what it
> > could be so any help
> > would be appreciated.
> >
> > TIA
> >
> > Ernst
>
>
>
>
>




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