Re: High network latency with ralink usb wireless device

[Jonathan Nieder <jrnieder@gmail.com>]

Hi Ben,

About a year ago, Richard Kettlewell wrote[1]:
> On 19/03/2011 22:31, Johannes Stezenbach wrote:

>> I sent a patch to disable power save by default, but then work started
>> to fix it instead, but then stalled.  Seems like 2.6.38 shipped with
>> broken power save enabled by default.  Plese read the discussion
>> following my RFC patch:
>> http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2011-January/thread.html#3017
>>
>> You can test if power saving causes your issue by disabling
>> it with "iwconfig wlan0 power off".
>
> That does the trick - thanks!

Therefore ever since version 2.6.38-2, Debian kernels have had
powersaving disabled on rt2800usb devices.

I think we should revisit this in light of

  v3.0-rc2~7^2~16^2~190 rt2x00: Add autowake support for USB hardware
  (2011-04-30)

though I wouldn't be surprised if testing ends up revealing some
followup patches introduced after v3.2 to be needed for it to work
well.  What do you think?

Thanks,
Jonathan

[1] http://bugs.debian.org/618930