Thread: [Madwifi-devel] Help needed for maxtxpower violation
Status: Beta
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From: soumya m. <sou...@gm...> - 2009-08-13 22:31:54
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Hello Everyone, I am having the issue Madwifi driver + AR2413 chipset transmitting higher power at lower band(<2.4012 Ghz) when there are no AP. Verified this by connecting spectrum analyzer and seeing the transmitted power. I am using the chipset AR2413 and madwifi driver svn revision 4022 and linux 2.6.24.3. More details of lspci 03:0f.0 Ethernet controller: Atheros Communications, Inc. AR5005G 802.11abg NIC (rev 01) Subsystem: Atheros Communications, Inc. Compex Wireless 802.11 b/g MiniPCI Adapter, Rev A1 [WLM54G] Flags: bus master, medium devsel, latency 96, IRQ 20 Memory at dfce0000 (32-bit, non-prefetchable) [size=64K] Capabilities: [44] Power Management version 4 ----------------------- dmesg when the module is loaded MadWifi: ath_attach: Switching rfkill capability off. wifi0: Atheros AR2413 chip found (MAC 7.8, PHY 2112A 4.5, Radio 5.6) ath_pci: wifi0: Atheros 2413: mem=0xdfce0000, irq=20 ------------------------- I am using wpa_supplicant, the wpa_supplicant.conf settings are ctrl_interface=/var/run ctrl_interface_group=<groupname> update_config=1 ---------------------------- Since this is operated in germany, I am setting the regdomain to 0x37 in EEPROM of chip using ath_info utility ath_info -f -w dfce0000 regdomain=0x37 Then loading the driver using countrycode settings modprobe ath_pci countrycode=276 strating the wpa_supplicant ---------------------------------- Note there are on access point available and when we measure the transmit power it shows 10dbm higher in lower band(<channel1(2.4012Ghz), this is violating the german ETSI regulations . As soon as access point/ssid becomes available the power level goes down and is within germany regulation. When does the maxtxpower gets set ? I am not sure if the driver is initializing all the values when I load the madwifi driver with germany country-code or it does later when it find a AP during scan. Any solution to this would help greatly, this blocking from product being passed for certification. When is the maxtxpower set? As we see the txpower go down when it finds any AP otherwise it very high at lower band(<2.4012Ghz) -- Thanks and Regards, Soumya |
From: Benoit P. <ben...@fr...> - 2009-08-14 11:28:10
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 soumya metukul a écrit : > > Note there are on access point available and when we measure the > transmit power it shows 10dbm higher in lower > band(<channel1(2.4012Ghz), this is violating the german ETSI > regulations . As soon as access point/ssid becomes available the > power level goes down and is within germany regulation. > > When does the maxtxpower gets set ? I am not sure if the driver is > initializing all the values when I load the madwifi driver with > germany country-code or it does later when it find a AP during > scan. Any solution to this would help greatly, this blocking from > product being passed for certification. Hello, I do not fully understand your problem. On what frequency are you doing your measures? What TX power do you expect? What TX power do get? How did you connect the spectrum analyzer to your system (splitter, cable, and so on)? Regards, Benoit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkqFSi8ACgkQOR6EySwP7oI1uACg+hY0RjloW7TiLHXPx1pB6keU UFQAoJj8f6C0k9CMEpdB7vYhLmKdMj4f =fqyx -----END PGP SIGNATURE----- |