Re: Fwd: p54: testing AP mode: cannot switch to master mode

2008/11/19 Johannes Berg [off-list ref]:

On Wed, 2008-11-19 at 17:23 +0100, Stefan Steuerwald wrote:

quoted

At first glance this improves things, but not enough. I have an ajax
application that is polling the web server and which runs into its 5
sec timeouts fairly regularly. [...deleted...]

What's your client? Is it using powersave? Anyone know whether
multicast-after-dtim works correctly in p54? Or maybe there's a bug
hitting with TIM bits? Do you have an extra card that you could use to
monitor and see what happens when it times out?

I have tested multiple clients at this time with my XG-601/ISL3880 p54 card:
- iPod Touch 2G with firmware 2.1.1
- Sony Vaio with a Marvell 88E8036 (Vista SP1)
- Amilo Notebook with Intel 4965AGN (stock Ubuntu 8.10)
- Amilo Notebook with Netgear USB-WLAN-Stick with RTL8187B (stock Ubuntu 8.10)

Interestingly, only the iPod is unusable, with constant timeouts of my
web-app. The other clients work 99% of the time with an _occasional_
timeout. I have multiple clients connected at the same time, and never
saw a simultaneous timeout with any two clients. I have also a wired
reference connection which never exhibits any timeouts.

I have no clue about iPod powersave. On the 4965 and the RTL8187 it
seems to be off (iwconfig output).

I do have indications of "general" WLAN problems with the iPod
(Apple's support forum is brimming with complaints). There may not be
any AP-related problem at all.

I will learn how to set up a card in monitor mode and post more info
if anything looks suspicious.

Thanks!
  Stefan.