Re: XO in 2 identical SSID scenario
Hello I would like to make an update about this issue, I`ve been working on this with Martin Langhoff support and after lots of come and goes I ended up getting some logs from the wpa_supplicant, where I found that AP shifting is produced after an AP scan in which the AP with different BSSID but identical ESSID is found first. Now I'm going to try to find which value is using the NM for the AP scan in order to know if the responsibility is on the driver (AP scan with parameter 0) or on the wpa_supplicant (AP scan with parameter 1). For that I'm planing (as suggested by Martin) is to connect directly to the daemon and put commands on my own and see how it behaves trying to find which is the command employed by the NM. Also I would like to share with you that this odd behavior is not present on the XO 1.5 with F11, not at least in the tests I runned. Bye Andres Nacelle ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
XO 1.5 with USB webcam
Hi, I'm trying to get a usb webcam to work with the XO1.5, till now failure is the only thing achieved. Has anyone already tryed this successfully o know how to do it? For the record I'm using: -kernel 2.6.30_xo1.5-20091104.1716.1.olpc.019dbcf on an i686 -Firmware Q3A15 -OS 37 -webcam eurocase EUCC760, lsusb gives: ID 0c45:612a Microdia PC Camera (SN9C325) Thanks in advance for any assistance -- Andres Nacelle ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Max throughput with XO on 802.11G
Hello fellows, I´ve been working some time ago on the maximum throughput you can get from an XO on it´s wireless and I got some interesting results, on which I still have to work but I would like to share with you to know if I´m trying to invent the wile again. But first the conditions, I´ve been using an XO 1.0 with Q2E35 firmware and image 801, the distance to the AP is less than 3m and the noise lv -91dBm. Now the interesting part, the test and the data. Basically what I did was measure the throughput that a XO can reach using for this the iperf. I configured an AP in order to only admit the maximum rate (11Mbps) from 802.11b and everything went ok, the max throughput achieved was 5,9 Mbps when the max thr with a 1500 Bytes package size is 6,3 Mbps. Now comes the interesting, when I did the same with 802.11g setting the rate at 54 Mbps te XO reached 14,5 Mbps which belongs to a 24Mbps rate, so I tried to do the same in that rate but the throughput was 10.0 Mbps. During the measures I watched the connection rate on the XO and was the proper one. My theory (and yet to check by package capture ) is that the maximum size package is not getting above 600 bytes. I did the math and plotted throughput vs package size for different rates and the results are congruent with my theory. After making some captures I´ll tell you. Bye -- Andres Nacelle Plan Ceibal - Investigación y Desarrollo Avda. Italia 6201 Montevideo - Uruguay. Tel.: 601 57 73 Int. 213 E-mail : anace...@plan.ceibal.edu.uy ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
XO in 2 identical SSID scenario
Hello pals, some time ago I did some research on the behavior from the XO in places with more than one access point with the same SSID, and the results from this test weren't much god. As some of you may remember basically what my study said was that the connection jumps from one AP to another too frequent even if the difference in the quality (or level) of the signal is really big. In the same conditions, and even if both signals are strong a regular computers stays connected to the same AP. I even tried different SO on the XO and after thous test I'm confident that the problem is somewhere close to the net card driver or firmware. The first time I wrote to you about this someone else had said something on the opposite hand but then he never replayed about the topic again and most of the feedback I received were questions about distances versions and configuration (that's not bad, but eater is useful). I would like to know if someone else did some test on this field in order to share results and points of view. I also tried to contact people from Marvel but they never replayed, does anyone know a good way to get to them? Well thanks a lot in advance for any help you can provide. -- Andres Nacelle Montevideo - Uruguay. ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
How to make a SoaS (or liveCD) from scratch
Hi guys, basically I'm trying to do a SoaS or a live CD with the image we are using now on the XO, which has our own selection of activities and packages. The thing is that I've been looking in the Sugarlab web page unsuccessfully. Till now all I have is the .img to put in the nand in the XO, buy I'm not sure how to make a .ISO with which I can create a bootable (is that word ok?) pendrive or cd. Any guidance would be absolutely welcome. Thanks a lot for all your help -- Andres Nacelle ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Wireless parameters
Hi, I'm trying to do some research on the wireless parameters reported by the XO, mainly on the quality (Q), in order to do some tests and establish a relationship between Q and capability of connecting to an AP and the stability of that connection. The thing is that I've already been looking technical information for some time on how the computers (or network card) calculate the quality parameter with no results, if somebody here could give me some orientation on how that works (and even better if you know how it`s done by the XO) or where I can read about it I would be more than thankful. Greetings and thanks for your assistance Andres Nacelle ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
