Re: Bug#567212: rt73usb with 2.6.32-trunk kernel

[Gertjan van Wingerde <gwingerde@gmail.com>]

On 02/28/10 17:40, Ben Hutchings wrote:
> Dawid wrote:
>> I use Edimax EW-7318USg  usb wifi adapter with rt73 chipset  - i use 
>> default rt73usb driver that is built in kernel and standard firmware 
>> from non-free repository package: firmware-ralink (0.22)  - on new 
>> 2.6.32 trunk kernel, connection is very unstable - i can connect to my 
>> access point but i get disconnected periodicly in about 6 to 10 seconds 
>> and get connected again afer about 4 seconds. This process repeats 
>> itself continously. I use WPAPSK autentication TKIP encryption in 
>> managed mode - with wpa_supplicant - encryption works but i guess 
>> becouse of such frequent disconnetions dhclient can't get IP and i can't 
>> connect to internet.
>>
>> On previous 2.6.30 kernel and same configuration, everything works fine 
>> and connection is stable.
>>
>> scanning with iwlist works on both kernels but on 2.6.32-trunk takes 2 
>> times longer.
> 
> Dawid wrote:
>> I attached kern.log to this e-mail.  Last logs in this file were made on 
>> 2.6.32-trunk kernel to make wlan0 entries from this kernel, clearly seen 
>> at the end of the file.
>>
>>
>>>
>>> Were you using the rt73usb driver (from Debian kernel packages) or the
>>> rt73 driver (from rt73-source or from Ralink)?
>>>
>>>   
>> I'm using standard rt73usb driver from Debian kernel packages on both 
>> kernels 2.6.30 and 2.6.32 - and as i wrote before, described problem 
>> exist only in 2.6.32 . Now i'm forced to use 2.6.30 becouse on this 
>> kernel internet connection is possible.
> 
> I'm forwarding this to the linux-wireless list in the hope that someone
> there will be able to investigate this.
> 

We recently discovered that rt73usb may be affected with powersaving issues.

Is it possible to check the stability of the connection with powersaving
disabled?
Just execute a iwconfig wlan0 power off before associating.

---
Gertjan.