Hi, Bob Thanks for the comments. > Question: did this work much better with a previous kernel, > or does it just perform poorly in all kernels tried? > > Kernel 2.6.30.7 (+ compat-wireless-2009-0820 ) I have not tried other version of kernel yet. regarding "a previous kernel", I can also try kernel 2.6.28, but is it "previous kernel" in your context ?
Also at the beginning, I doubted this was cased by PCI bus error of Ubiquity Router Station Pro (board), but I feel this possibility is so small at this moment. > Also, how far apart are the nodes in the network? > > I tried 1m, 50cm, 30cm and etc. but this problem always remains here. (also, I tried different frequencies, 2412, 2442, 2472MHz, and found the almost same result with a bit difference ) > Note ath5k compared to madwifi does not have automatic noise > immunity so it is expected to perform somewhat poorly at > higher rates. the madwifi in my test bed is 0.9.4 base and ANI is disabled for it I believe. ( back to 2 year ago, madwifi community had discussion about ANI and 0.9.4 has the swich enabling/disabling ANI,, let me check again ) thanks Taka >> Hi, Ignacy and all >> >> >>> So it seems that there's something wrong with the way the ath5k receives the >>> frames, independently of the mode (or so it appears). >>> >>> Something to do with the noise floor calibration perhaps? >>> >> My results also agrees to this conclusion. >> In my case, ath5k_tasklet_rx() shows packet receptions were failed >> due to AR5K_RXERR_CRC error when 54M and 48Mbps rate is >> selected at the sender side. >> >> I am looking at the patch "ath5k: use noise calibration from madwifi hal" >> which Bob posted a week before, but have not tried it yet. >> > > I doubt it will make a huge difference, but feel free to > try. > > Question: did this work much better with a previous kernel, > or does it just perform poorly in all kernels tried? > > Also, how far apart are the nodes in the network? > > Note ath5k compared to madwifi does not have automatic noise > immunity so it is expected to perform somewhat poorly at > higher rates. > > -- ***************************************** 株式?社 ??????? 海藻 敬之 tka...@thinktube.com 〒658-0032 神?市東灘?向洋町中６－９ KFM?? 4E-10 Phone: 078-857-8390 Fax: 078-857-8389 www.thinktube.com
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