[maemo-users] Power consumption and WLAN APs

From: John Holmblad jholmblad at acadiasecurenets.com
Date: Thu Jul 24 00:33:10 EEST 2008

after thinking about Kalle's explanation of PSM, and as the owner of a 
UTStarcom Windows Mobile handset (Verizon Wireless XV6700) that supports 
both EVDO and 802.11b, I have to conclude that, The UTS XV6700 does not 
do a satisfactory job with respect to PSM.

My conclusion here is based on the fact that the XV6700 quickly runs out 
of battery when the WIFI is turned on. Although I have an app on the 
XV6700 that will dump packet traces, I don't know of a way to enable, as 
Kalle suggests, monitor mode, or if it is even supported by the chipset 
used in the Xv6700 in order to investigate the root cause of this problem. 

Needless to say, whenever I bring my handset somewhere where I plan on 
using the WIFI, or,, for that matter the EVDO interface (which also 
seems to use a lot of "juice") so I can access the Internet from the 
Xv6700 or from the N800), I bring an AC adapter along.

Best Regards,


John Holmblad


Acadia Secure Networks, LLC

* *

Andrew Daviel wrote:
> Excellent writeup, thanks :-)
> So, what devices apart from the Nokia tablets use PSM ?
> iPhone ? Palm ? Windows Mobile devices like the UTstarcom PocketPC  ?
> I opened a ticket with Proxim; not sure if our contract includes support 
> but maybe I'll get a reply.
> Is there anything for the tablets that can log wireless traffic in enough 
> detail to show whether PSM is working ? airodump-ng ??
> How about on laptops ? Airmagnet drivers perhaps (which we don't have) - 
> I have an ancient Orinoco Gold card on a Dell Latitude, and a slightly 
> less old Thinkpad with (I think) madwifi driver, and a new Lenovo on the 
> way (Windows, though)

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