Re: WLAN Power Save Mode timeout
"Levi Bard" <[EMAIL PROTECTED]> writes: >> Sorry, but I find it hard to believe that Cisco APs would not properly >> work with TKIP or AES. Cisco APs are of the best quality I have ever >> seen. And all the EAP tests in Wi-Fi certifications are run with >> either TKIP or AES (Wi-Fi Alliance calls it WPA-Enterprise, or >> something like that), so it's widely tested as well. > > The problem (in my case) is that I don't have control over the AP > configurations. I would be perfectly happy to use the > currently-supported WPA algorithms if I had the ability to do so. Yes, I understand that. Most probably it would very difficult for the network administrators as well. Here I was just wondering about Riku's comment of TKIP and AES not working with Cisco Access Points. I did receive good concrete examples where 802.1x+WEP is used, thanks to everyone for that. I will raise the issue internally about 802.1x+WEP support, but of course I cannot make any promises. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
At the moment there will not be support for wpasupplicant in the built-in Internet Connection daemon, sorry for that. In the longer run this could be made possible, as I shall add that to our wish list. I don't actually mean that I'd like wpasupplicant support in the built-in daemon, I specifically mean WEP+EAP support, so that hacking around with wpasupplicant is not necessary, particularly since you already support WEP and WPA+EAP out-of-the-box. -- It doesn't take a nukular scientist to pronounce foilage! --Marge Simpson http://www.gnu.org/philosophy/shouldbefree.html ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Hi, On Wed, 2007-03-07 at 11:31 -0600, ext Levi Bard wrote: > > About using wpasupplicant. I think it shouldn't be too hard to use > > wpasupplicant on 770 or N800. The wireless extension interface to the > > WLAN driver isn't quite up-to-date, so you would have to do some > > tweaking there. And of course you would have to bypass all UI, icd and > > wlancond components. But it should be doable. > > If it's easy enough for a power user to do, will nokia also work to > support it in the built-in connection manager? Since we've > established that it's a semi-standard problem for IT users? At the moment there will not be support for wpasupplicant in the built-in Internet Connection daemon, sorry for that. In the longer run this could be made possible, as I shall add that to our wish list. Unfortunately we're not able to support a wpasupplicant hacking effort at the moment, but you could start by tracking down what D-Bus messaging there is between ICd and EAP software. EAP is pretty independent of ICd, so there should be only very messages exchanged. It should not be too hard to implement/emulate those and start wpasupplicant in response. Settings are stored in gconf, and by logging debug syslog messages from icd might give some more details (IIRC). Actually, the wireless extensions might turn up difficult to do, and I'm not at all sure what - or how complicated - messages there might be between wlancond and EAP. The UI interaction messages are "easy" as they are specified in osso-ic-ui-dbus.h from the osso-ic-oss package. They can also be validated manually from the command line using dbus-send. Hope this helps, Patrik -- Patrik Flykt <[EMAIL PROTECTED]> ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Sorry, but I find it hard to believe that Cisco APs would not properly work with TKIP or AES. Cisco APs are of the best quality I have ever seen. And all the EAP tests in Wi-Fi certifications are run with either TKIP or AES (Wi-Fi Alliance calls it WPA-Enterprise, or something like that), so it's widely tested as well. The problem (in my case) is that I don't have control over the AP configurations. I would be perfectly happy to use the currently-supported WPA algorithms if I had the ability to do so. > wpasupplicant already supports EAP-TTLS, how hard would it be for > a poweruser to use it instead of the current supplicant? Do you already know that N800 already supports EAP-TTLS, with TKIP or AES encryption? About using wpasupplicant. I think it shouldn't be too hard to use wpasupplicant on 770 or N800. The wireless extension interface to the WLAN driver isn't quite up-to-date, so you would have to do some tweaking there. And of course you would have to bypass all UI, icd and wlancond components. But it should be doable. If it's easy enough for a power user to do, will nokia also work to support it in the built-in connection manager? Since we've established that it's a semi-standard problem for IT users? -- It doesn't take a nukular scientist to pronounce foilage! --Marge Simpson http://www.gnu.org/philosophy/shouldbefree.html ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Riku Voipio <[EMAIL PROTECTED]> writes: >> This has been requested occasionally. It would help if you could come >> up with some kind of examples where this is needed. That they I could >> show that there's really a need for this. Technically there's no point >> of supporting 802.1x with WEP encryption, because TKIP is already >> widely supported. >> >> > EAP-TTLS with wep was the best *functioning* radius-authenticated > protocol supported by cisco access points (aironet 1100, 12xx). Yes > they supported TKIP and AES, but not very well *together* with EAP. Sorry, but I find it hard to believe that Cisco APs would not properly work with TKIP or AES. Cisco APs are of the best quality I have ever seen. And all the EAP tests in Wi-Fi certifications are run with either TKIP or AES (Wi-Fi Alliance calls it WPA-Enterprise, or something like that), so it's widely tested as well. > wpasupplicant already supports EAP-TTLS, how hard would it be for > a poweruser to use it instead of the current supplicant? Do you already know that N800 already supports EAP-TTLS, with TKIP or AES encryption? About using wpasupplicant. I think it shouldn't be too hard to use wpasupplicant on 770 or N800. The wireless extension interface to the WLAN driver isn't quite up-to-date, so you would have to do some tweaking there. And of course you would have to bypass all UI, icd and wlancond components. But it should be doable. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
"Frantisek Dufka" <[EMAIL PROTECTED]> writes: >> Really? I remember that we only added it to N800. Oh well, I'm glad >> that I was wrong :) >> > > Just to clear possible confusion, 2007 was not a typo, I mean the > hacker edition, not regular IT2006. So if 770 uses PSM and you would > need just newer osso-wlan sources, this condition is probably true in > 2007 on N770. Ok, this makes sense now. The wlan_sleep_timeout gconf key is a feature of wlancond (from osso-wlan). Thanks for the explanation. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Kalle Valo wrote: 770 uses WLAN PSM but it doesn't have the gconf key for changing the value. It has 1000 ms timeout hardcoded. But I guess you could take the osso-wlan sources and change the hardcoded value in wlancond. Can we get the gconf key added for the next release of OS2006? FWIW just tried this with OS2007 on 770 and it seems to work. At least dmesg prints 'PSM timeout 200 ms' when connection is opened. Really? I remember that we only added it to N800. Oh well, I'm glad that I was wrong :) Just to clear possible confusion, 2007 was not a typo, I mean the hacker edition, not regular IT2006. So if 770 uses PSM and you would need just newer osso-wlan sources, this condition is probably true in 2007 on N770. Frantisek ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
"ext Frantisek Dufka" <[EMAIL PROTECTED]> writes: >>> 770 uses WLAN PSM but it doesn't have the gconf key for changing the >>> value. It has 1000 ms timeout hardcoded. But I guess you could take >>> the osso-wlan sources and change the hardcoded value in wlancond. >> >> Can we get the gconf key added for the next release of OS2006? > > FWIW just tried this with OS2007 on 770 and it seems to work. At least > dmesg prints 'PSM timeout 200 ms' when connection is opened. Really? I remember that we only added it to N800. Oh well, I'm glad that I was wrong :) -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Levi Bard wrote: 770 uses WLAN PSM but it doesn't have the gconf key for changing the value. It has 1000 ms timeout hardcoded. But I guess you could take the osso-wlan sources and change the hardcoded value in wlancond. Can we get the gconf key added for the next release of OS2006? FWIW just tried this with OS2007 on 770 and it seems to work. At least dmesg prints 'PSM timeout 200 ms' when connection is opened. Frantisek ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Kalle Valo wrote: And WEP + EAP please? This has been requested occasionally. It would help if you could come up with some kind of examples where this is needed. That they I could show that there's really a need for this. Technically there's no point of supporting 802.1x with WEP encryption, because TKIP is already widely supported. EAP-TTLS with wep was the best *functioning* radius-authenticated protocol supported by cisco access points (aironet 1100, 12xx). Yes they supported TKIP and AES, but not very well *together* with EAP. wpasupplicant already supports EAP-TTLS, how hard would it be for a poweruser to use it instead of the current supplicant? ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
On Wednesday 21 February 2007 07:48:19 Levi Bard wrote: > > > And WEP + EAP please? > > > > This has been requested occasionally. It would help if you could come > > up with some kind of examples where this is needed. That they I could > > show that there's really a need for this. Technically there's no point > > of supporting 802.1x with WEP encryption, because TKIP is already > > widely supported. > > Many wireless networks in the US, for some reason universities in > particular, ONLY allow connections using WEP + EAP (usually PEAP in my > experience). One example is Texas Tech University ( > http://www.ttu.edu ), which requires all wireless devices to use > WEP+PEAP, no exceptions. (Yes I've argued with them about their > implementation, yes I've requested either WPA or EAPless access for > devices that don't expect that particular kludge, ...) A lot of the reason from my experience comes about because WEP+EAP was current at the time of the equipment purchase and many companies and Universities won't change until such time as the equipment they have as reach end of life and they can afford to replace it. Second reason. Because many "security" admins are afraid that if they admit something new is better than what they recommended then they will perceived as incompetent. Then again I just spent the day arguing with a security "expert" who didn't want me to bring my laptop in because it is a Linux box and their Anti Virus can't scan my system. (Never mind that it can't scan any of the other contractors mac or windows boxes either ) James > > While there may technically not be a reason to use it, many access > providers are using it regardless, and, particularly for college > campuses, which tend to be so large that other access points are > unavailable, it would be nice not to be in a wifi blackout. -- (o_ //\ V_/_ Linuxrebel ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
"Kalle Valo" <[EMAIL PROTECTED]> writes: > If you have tested different timeouts, please send me feedback if it > works or not. Include the make and model of the AP used for testing, > and a small description of the problem. This would be really helpful > for us to see what kind of problems there still are with WLAN PSM. I have received few reports, really good, but keep them coming still. The more the better :) I have understood that there are web forums with quite active users. Could someone please pass my request to the forums as well? For example you could send the link to my post in the archives: http://maemo.org/pipermail/maemo-users/2007-February/004092.html (I myself can't follow the web forums, the user interface is just too slow for me. I prefer keyboard over mouse.) Also few things which I forgot to mention. Internet Radio is the best way to test WLAN PSM. At least AccuRadio sends packets approximately 500 ms apart, so with the sleep timeout of 200 ms the device will go to sleep mode for sure. Also a good test is to ping from the network towards N800 with an interval greater than the sleep timeout. If everything is working as they should, not a single packet should be lost. For example, set the sleep timeout on N800 to 200 ms and ping from the network with an interval of one second (which I guess is the default for all ping applications). Thanks for your help, Maemo community. Greatly appreciated. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Kalle Valo wrote: This has been requested occasionally. It would help if you could come up with some kind of examples where this is needed. That they I could show that there's really a need for this. Technically there's no point of supporting 802.1x with WEP encryption, because TKIP is already widely supported. It's a problem that crops up fairly often on the ITT forums, with students (ideal users for ITT no?) wishing to connect to US University campus WiFi - the most recent new thread appeared yesterday[1]. There are also 3 enhancement requests in Bugzilla relating to PEAP/EAP support[2,3,4]. Not sure of your sources, but judging by the more public forums, there seems to be a fair demand for PEAP/EAP. Perhaps engaging with the people who have taken the time to log Bugzilla entries will allow Nokia to understand why there is a demand? Just a thought... :) 1. http://www.internettablettalk.com/forums/showthread.php?t=4835 2. https://maemo.org/bugzilla/show_bug.cgi?id=417 3. https://maemo.org/bugzilla/show_bug.cgi?id=950 4. https://maemo.org/bugzilla/show_bug.cgi?id=1017 ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: openvpn (was: Re: WLAN Power Save Mode timeout)
openvpn from the Application2006 page works well on N800, I use it all the time. Laurent Selon Andrea Trentini <[EMAIL PROTECTED]>: > Levi Bard wrote: > > Many wireless networks in the US, for some reason universities in > > particular, ONLY allow connections using WEP + EAP (usually PEAP in my > > experience). One example is Texas Tech University ( > > http://www.ttu.edu ), which requires all wireless devices to use > > WEP+PEAP, no exceptions. (Yes I've argued with them about their > > implementation, yes I've requested either WPA or EAPless access for > > devices that don't expect that particular kludge, ...) > > at our univ. we have an open (no auth, but completely firewalled) wifi > that requires us to use openvpn to reach anywhere... > so I badly need openvpn for N800... > > ok, this is just a feature request ;) > > thanks > > -- > Doctors and lawyers must go to school for years and years, often with > little sleep and with great sacrifice to their first wives. > -- Roy G. Blount, Jr. > -- > Andrea Trentinihttp://www.atrent.it > Dipartimento di Informatica e Comunicazione - Universita' Statale di Milano > -- > *** Dal 2007 stop a tutti gli Euro0! Dovrete buttare le vostre auto/moto! > *** > - In difesa dei motociclisti (http://www.motocivismo.it) > - Per uno Stato laico (http://www.uaar.it) > - Liberta' di parola e privacy (http://www.interlex.it - > http://www.alcei.org) > - Usate software libero! (http://www.gnu.org - http://www.fsf.org) > -- > Scoprite perche' il provvedimento di messa al bando degli EURO 0 e' inutile: > http://www.motocivismo.it/index.php?mod=Download&file=DocumentiVari/SpiegazioneAssurditaBandoEuro0.pdf&mode=go > ___ > maemo-users mailing list > maemo-users@maemo.org > https://maemo.org/mailman/listinfo/maemo-users > ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: openvpn (was: Re: WLAN Power Save Mode timeout)
at our univ. we have an open (no auth, but completely firewalled) wifi that requires us to use openvpn to reach anywhere... so I badly need openvpn for N800... Does the 2006 version ( http://guerby.org/ftp/nokia800-deb/ ) not install/run on N800? -- It doesn't take a nukular scientist to pronounce foilage! --Marge Simpson http://www.gnu.org/philosophy/shouldbefree.html ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
openvpn (was: Re: WLAN Power Save Mode timeout)
Levi Bard wrote: Many wireless networks in the US, for some reason universities in particular, ONLY allow connections using WEP + EAP (usually PEAP in my experience). One example is Texas Tech University ( http://www.ttu.edu ), which requires all wireless devices to use WEP+PEAP, no exceptions. (Yes I've argued with them about their implementation, yes I've requested either WPA or EAPless access for devices that don't expect that particular kludge, ...) at our univ. we have an open (no auth, but completely firewalled) wifi that requires us to use openvpn to reach anywhere... so I badly need openvpn for N800... ok, this is just a feature request ;) thanks -- Doctors and lawyers must go to school for years and years, often with little sleep and with great sacrifice to their first wives. -- Roy G. Blount, Jr. -- Andrea Trentinihttp://www.atrent.it Dipartimento di Informatica e Comunicazione - Universita' Statale di Milano -- *** Dal 2007 stop a tutti gli Euro0! Dovrete buttare le vostre auto/moto! *** - In difesa dei motociclisti (http://www.motocivismo.it) - Per uno Stato laico (http://www.uaar.it) - Liberta' di parola e privacy (http://www.interlex.it - http://www.alcei.org) - Usate software libero! (http://www.gnu.org - http://www.fsf.org) -- Scoprite perche' il provvedimento di messa al bando degli EURO 0 e' inutile: http://www.motocivismo.it/index.php?mod=Download&file=DocumentiVari/SpiegazioneAssurditaBandoEuro0.pdf&mode=go ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
> And WEP + EAP please? This has been requested occasionally. It would help if you could come up with some kind of examples where this is needed. That they I could show that there's really a need for this. Technically there's no point of supporting 802.1x with WEP encryption, because TKIP is already widely supported. Many wireless networks in the US, for some reason universities in particular, ONLY allow connections using WEP + EAP (usually PEAP in my experience). One example is Texas Tech University ( http://www.ttu.edu ), which requires all wireless devices to use WEP+PEAP, no exceptions. (Yes I've argued with them about their implementation, yes I've requested either WPA or EAPless access for devices that don't expect that particular kludge, ...) While there may technically not be a reason to use it, many access providers are using it regardless, and, particularly for college campuses, which tend to be so large that other access points are unavailable, it would be nice not to be in a wifi blackout. -- It doesn't take a nukular scientist to pronounce foilage! --Marge Simpson http://www.gnu.org/philosophy/shouldbefree.html ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Le mardi 20 février 2007 à 11:55 +0200, Kalle Valo a écrit : > If you have tested different timeouts, please send me feedback if it > works or not. Include the make and model of the AP used for testing, > and a small description of the problem. This would be really helpful > for us to see what kind of problems there still are with WLAN PSM. I've tested with two different AP : -Freebox v5 (ISP DSL modem + wifi AP), which is based on ralink 2661 (802.11g + MIMO, pre-n) -Linksys WRV54G both with timeout 200ms and everything seems to work nicely. I didn't notice any slowdown. The only "problem" is to test extended battery usage ;) Since it is only triggered by timeout on network activity, autonomy can only be gained (and therefore mesured) this way for interactive usage (web browsing, IM) and not by stressing network (for instance, by playing a radio stream). I guess it will be hard to find a good testcase to show how much power is gained this way. -- Frederic Crozat <[EMAIL PROTECTED]> ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Kalle Valo skrev: "Levi Bard" <[EMAIL PROTECTED]> writes: And WEP + EAP please? This has been requested occasionally. It would help if you could come up with some kind of examples where this is needed. That they I could show that there's really a need for this. Technically there's no point of supporting 802.1x with WEP encryption, because TKIP is already widely supported. This is something I would need in order to access my university's network. As far as I can tell WEP+PEAP is the only way for us students to get online: http://www.itenheten.kau.se/tjanster/wlan/wlanstudwinxpeng.pdf Likewise for any secure access to our university's wireless: http://www.uwo.ca/its/doc/hdi/wireless/peap.html --- Gary Molenkamp SHARCNET Systems Administrator University of Western Ontario [EMAIL PROTECTED] http://www.sharcnet.ca (519) 661-2111 x88429 (519) 661-4000 ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Kalle Valo skrev: "Levi Bard" <[EMAIL PROTECTED]> writes: And WEP + EAP please? This has been requested occasionally. It would help if you could come up with some kind of examples where this is needed. That they I could show that there's really a need for this. Technically there's no point of supporting 802.1x with WEP encryption, because TKIP is already widely supported. This is something I would need in order to access my university's network. As far as I can tell WEP+PEAP is the only way for us students to get online: http://www.itenheten.kau.se/tjanster/wlan/wlanstudwinxpeng.pdf -- Andreas Persenius Nokia N800 user ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
"Levi Bard" <[EMAIL PROTECTED]> writes: >> 770 uses WLAN PSM but it doesn't have the gconf key for changing the >> value. It has 1000 ms timeout hardcoded. But I guess you could take >> the osso-wlan sources and change the hardcoded value in wlancond. > > Can we get the gconf key added for the next release of OS2006? I'll forward your request forward. > And WEP + EAP please? This has been requested occasionally. It would help if you could come up with some kind of examples where this is needed. That they I could show that there's really a need for this. Technically there's no point of supporting 802.1x with WEP encryption, because TKIP is already widely supported. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
770 uses WLAN PSM but it doesn't have the gconf key for changing the value. It has 1000 ms timeout hardcoded. But I guess you could take the osso-wlan sources and change the hardcoded value in wlancond. Can we get the gconf key added for the next release of OS2006? And WEP + EAP please? -- It doesn't take a nukular scientist to pronounce foilage! --Marge Simpson http://www.gnu.org/philosophy/shouldbefree.html ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
On Tue, 2007-02-20 at 11:55 +0200, ext Kalle Valo wrote: > WLAN has a feature called Power Save Mode (PSM), which saves a lot of > power. The timeout for going to PSM can be configured for N800 using a > gconf key. Here's an example how to change the timeout to 200 ms: > > gconftool-2 --set --type int > '/system/osso/connectivity/IAP/wlan_sleep_timeout' '200' > If you have tested different timeouts, please send me feedback if it > works or not. Include the make and model of the AP used for testing, > and a small description of the problem. This would be really helpful > for us to see what kind of problems there still are with WLAN PSM. Just wanted to point out - very low values (10-100ms) _might_ lead to increase in power consumption and higher latency. This is because the radio might shutdown too soon and would have to be woken up again. e.g. Slow DNS responses. ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
Paul Klapperich wrote: Google didn't seem to know a whole lot about it off hand, but I figure you probably do. Found also this http://www.wi-fiplanet.com/tutorials/article.php/1015781 It explains a bit more about tradeoff between speed and power saving. Frantisek ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
"ext Damien Challet" <[EMAIL PROTECTED]> writes: >> WLAN has a feature called Power Save Mode (PSM), which saves a lot of >> power. The timeout for going to PSM can be configured for N800 using a >> gconf key. Here's an example how to change the timeout to 200 ms: > > what about the 770? 770 uses WLAN PSM but it doesn't have the gconf key for changing the value. It has 1000 ms timeout hardcoded. But I guess you could take the osso-wlan sources and change the hardcoded value in wlancond. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
On Tuesday 20 February 2007 10:55, Kalle Valo wrote: > WLAN has a feature called Power Save Mode (PSM), which saves a lot of > power. The timeout for going to PSM can be configured for N800 using a > gconf key. Here's an example how to change the timeout to 200 ms: what about the 770? ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
"Paul Klapperich" <[EMAIL PROTECTED]> writes: > Could you maybe provide a quick layperson's explanation of what setting PSM > Timeout, ie how it saves battery power[1]? A technical explanation or link > to a more technical explanation would also be neat, but the simple > explanation should satisfy most of us and provide a research starting point > if we desire to go more in depth. Google didn't seem to know a whole lot > about it off hand, but I figure you probably do. Sure. Here's a small introduction, I hope it helps: Basically WLAN Power Save Mode means that we turn off the radios completely and only wakeup for the beacons sent by the AP. This wakeup period can be configured by the administrator of the AP. The wakeup period is DTIM count multiplied by beacon period. For example, if DTIM is 3 and beacon period is 100 ms, N800 wakes up every 300ms (3*100 ms). But because using PSM creates latency (especially if the network administrator has configured long wakeup periods), using PSM would be too slow for the users. So what N800 does it that it enables PSM only after certain time after the last data frame is sent. And that's the time wlan_sleep_timeout gconf key is used for. For example, if the timeout is 1000 ms, the device will wait a total of one second after the last data frame sent until PSM is enabled. That's a long time to waste power just to keep radios running just in case. But if the timeout is reduced to 200 ms, radios are turned on only fifth of the original time. -- Kalle Valo ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
Re: WLAN Power Save Mode timeout
On 2/20/07, Kalle Valo <[EMAIL PROTECTED]> wrote: WLAN has a feature called Power Save Mode (PSM), which saves a lot of power. The timeout for going to PSM can be configured for N800 using a gconf key. Could you maybe provide a quick layperson's explanation of what setting PSM Timeout, ie how it saves battery power[1]? A technical explanation or link to a more technical explanation would also be neat, but the simple explanation should satisfy most of us and provide a research starting point if we desire to go more in depth. Google didn't seem to know a whole lot about it off hand, but I figure you probably do. --Paul ___ maemo-users mailing list maemo-users@maemo.org https://maemo.org/mailman/listinfo/maemo-users
