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On Thursday 05 May 2011 18:40:30 John Nielsen wrote: |
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> I am trying to set up a 5GHz wireless access point on an Alix 3d2 board |
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> with an AR9220 (ath9k "Merlin") PCI card. I have done so successfully |
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> using Fedora 14 on identical hardware but I would greatly prefer to use |
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> Gentoo so I can use a more recent kernel and customize things |
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> appropriately for the platform. |
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> |
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> I have an up-to-date ~x86 Gentoo build working and I am able to run hostapd |
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> as a 2.4GHz access point, but trying to run it on a 5 GHz channel in "a" |
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> mode fails complaining it is unable to set the channel. After some poking |
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> around I realized that this was due to the regulatory domain not being set |
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> correctly--the default ("world"?) regdomain doesn't allow IBSS on any 5GHz |
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> channels. |
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> |
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> I made sure I had crda emerged and tried several different kernel settings |
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> but none of them resulted in any different behavior. I even tried |
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> statically compiling the regdb ("CONFIG_CFG80211_INTERNAL_REGDB=y") but |
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> didn't see any difference. I can run "iw reg set US" all day long but |
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> whenever I run "iw reg get" it always comes back with "country 00" on the |
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> Gentoo system. |
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> |
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> Since I'm a relative newbie to both Gentoo and custom Linux kernel building |
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> I wanted to make sure I wasn't just missing a setting or kernel config |
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> flag somewhere before I started looking for things like driver |
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> regressions. Can anyone suggest different things to try to fix the problem |
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> or at least pinpoint it better? |
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> |
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> Below is some info from both the Gentoo system (regdomain not working) and |
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> the Fedora system (regdomain working). Let me know what additional |
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> information would be helpful. Thanks! |
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> |
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> JN |
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> |
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> |
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> ### Gentoo ~x86 ### |
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> # uname -a |
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> Linux alix2 2.6.38-gentoo-r3 #7 Mon May 2 12:51:18 EDT 2011 i586 Geode(TM) |
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> Integrated Processor by AMD PCS AuthenticAMD GNU/Linux |
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> |
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> # relevant dmesg output |
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> [ 0.107215] cfg80211: Calling CRDA to update world regulatory domain |
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> [ 2.228041] ath: EEPROM regdomain: 0x0 |
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> [ 2.228056] ath: EEPROM indicates default country code should be used |
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> [ 2.228072] ath: doing EEPROM country->regdmn map search |
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> [ 2.228093] ath: country maps to regdmn code: 0x3a |
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> [ 2.228108] ath: Country alpha2 being used: US |
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> [ 2.228122] ath: Regpair used: 0x3a |
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> |
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> # iw reg set US |
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> # iw reg get |
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> country 00: |
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> (2402 - 2472 @ 40), (6, 20) |
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> (2457 - 2482 @ 20), (6, 20), PASSIVE-SCAN, NO-IBSS |
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> (2474 - 2494 @ 20), (6, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS |
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> (5170 - 5250 @ 40), (6, 20), PASSIVE-SCAN, NO-IBSS |
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> (5735 - 5835 @ 40), (6, 20), PASSIVE-SCAN, NO-IBSS |
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> |
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> # iw list |
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> ... |
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> Frequencies: |
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> * 5180 MHz [36] (18.0 dBm) (passive scanning, no IBSS) |
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> * 5200 MHz [40] (18.0 dBm) (passive scanning, no IBSS) |
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> * 5220 MHz [44] (18.0 dBm) (passive scanning, no IBSS) |
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> * 5240 MHz [48] (18.0 dBm) (passive scanning, no IBSS) |
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> ... |
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> |
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> # relevant packages |
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> net-wireless/crda-1.1.1 |
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> net-wireless/iw-0.9.22 |
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> net-wireless/wireless-regdb-20101124 |
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> net-wireless/wireless-tools-30_pre9 |
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> sys-kernel/gentoo-sources-2.6.38-r3 |
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> |
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> |
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> ### Fedora 14 ### |
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> $ uname -a |
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> Linux alix.jnielsen.net 2.6.35.6-45.fc14.i686 #1 SMP Mon Oct 18 23:56:17 |
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> UTC 2010 i586 i586 i386 GNU/Linux |
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> |
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> # relevant dmesg output |
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> [ 13.191924] cfg80211: Calling CRDA to update world regulatory domain |
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> [ 13.433288] cfg80211: World regulatory domain updated: |
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> [ 17.134923] ath: EEPROM regdomain: 0x0 |
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> [ 17.134943] ath: EEPROM indicates default country code should be used |
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> [ 17.134961] ath: doing EEPROM country->regdmn map search |
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> [ 17.134984] ath: country maps to regdmn code: 0x3a |
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> [ 17.135001] ath: Country alpha2 being used: US |
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> [ 17.135018] ath: Regpair used: 0x3a |
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> [ 17.248674] cfg80211: Calling CRDA for country: US |
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> [ 18.848206] cfg80211: Regulatory domain changed to country: US |
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> |
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> $ iw reg get |
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> country US: |
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> (2402 - 2472 @ 40), (3, 27) |
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> (5170 - 5250 @ 40), (3, 17) |
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> (5250 - 5330 @ 40), (3, 20), DFS |
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> (5490 - 5600 @ 40), (3, 20), DFS |
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> (5650 - 5710 @ 40), (3, 20), DFS |
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> (5735 - 5835 @ 40), (3, 30) |
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> |
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> $ iw list |
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> ... |
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> Frequencies: |
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> * 5180 MHz [36] (17.0 dBm) |
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> * 5200 MHz [40] (17.0 dBm) |
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> * 5220 MHz [44] (17.0 dBm) |
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> * 5240 MHz [48] (17.0 dBm) |
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> ... |
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> |
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> # relevant packages |
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> iw-0.9.22-1.fc14.1.i686 |
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> crda-1.1.1_2010.11.22-1.fc14.i686 |
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> wireless-tools-29-5.1.fc12.i686 |
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> kernel-2.6.35.6-45.fc14.i686 |
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|
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Last time I had a problem like this (some time ago now) I discovered that it |
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was because of the driver - the version or the firmware was not developed |
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enough. A few weeks/months later the version was updated and the |
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functionality was suddenly there. |
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BTW, did you try wpa_supplicant in case it makes a difference? |
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-- |
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Regards, |
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Mick |
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