* regulatory hiccup
@ 2010-07-23 19:30 Andrew Lutomirski
2010-07-23 19:35 ` Andrew Lutomirski
2010-07-27 23:30 ` Luis R. Rodriguez
0 siblings, 2 replies; 8+ messages in thread
From: Andrew Lutomirski @ 2010-07-23 19:30 UTC (permalink / raw)
To: linux-wireless
This is 2.6.35-rc4, but this bug (?) might exist in other versions ,too.
Early in boot, all was well:
[ 5524.214376] cfg80211: Calling CRDA to update world regulatory domain
[ 5524.219025] cfg80211: Calling CRDA for country: US
[ 5524.238440] cfg80211: Regulatory domain changed to country: US
[ 5524.238443] (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp)
[ 5524.238446] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 5524.238448] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[ 5524.238451] (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5524.238454] (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5524.238456] (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 5524.238459] (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Then, after fiddling with an AP for a bit, I got:
[11747.264221] cfg80211: Calling CRDA for country: US
[11747.282664] cfg80211: Current regulatory domain updated by AP to: US
[11747.282672] (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp)
[11747.282680] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
[11747.282688] (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
(Note lots of missing channels after that.) iw phy phy0 info showed
all the channels above 5.33GHz disabled. I didn't see some other APs
that were there.
Later on I disconnected, CRDA got called again, and all was well.
The AP that I had just connected to when everything broke was an
EnGenuis ESR7750 (brand new), and maybe it sent something wrong, but
surely if it says US it shouldn't disable other APs on US bands that
CRDA says is OK.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-23 19:30 regulatory hiccup Andrew Lutomirski
@ 2010-07-23 19:35 ` Andrew Lutomirski
2010-07-23 20:03 ` Andrew Lutomirski
2010-07-27 23:32 ` Luis R. Rodriguez
2010-07-27 23:30 ` Luis R. Rodriguez
1 sibling, 2 replies; 8+ messages in thread
From: Andrew Lutomirski @ 2010-07-23 19:35 UTC (permalink / raw)
To: linux-wireless
On Fri, Jul 23, 2010 at 3:30 PM, Andrew Lutomirski <luto@mit.edu> wrote:
>
> Then, after fiddling with an AP for a bit, I got:
>
> [11747.264221] cfg80211: Calling CRDA for country: US
> [11747.282664] cfg80211: Current regulatory domain updated by AP to: US
> [11747.282672] (start_freq - end_freq @ bandwidth),
> (max_antenna_gain, max_eirp)
> [11747.282680] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
> [11747.282688] (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
>
It's worse than that. I reconnected to the AP (it appeared to work
for a few seconds) and I saw:
Wiphy phy0
[...]
Band 2:
Capabilities: 0x872
HT20/HT40
Static SM Power Save
RX Greenfield
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 4 usec (0x05)
HT TX/RX MCS rate indexes supported: 0-23, 32
Frequencies:
* 5180 MHz [36] (15.0 dBm) (passive scanning, no IBSS)
* 5200 MHz [40] (15.0 dBm) (passive scanning, no IBSS)
* 5220 MHz [44] (15.0 dBm) (passive scanning, no IBSS)
* 5240 MHz [48] (15.0 dBm) (passive scanning, no IBSS)
* 5260 MHz [52] (15.0 dBm) (passive scanning, no IBSS, radar detection)
* 5280 MHz [56] (15.0 dBm) (passive scanning, no IBSS, radar detection)
* 5300 MHz [60] (15.0 dBm) (passive scanning, no IBSS, radar detection)
* 5320 MHz [64] (15.0 dBm) (passive scanning, no IBSS, radar detection)
* 5500 MHz [100] (disabled)
* 5520 MHz [104] (disabled)
* 5540 MHz [108] (disabled)
* 5560 MHz [112] (disabled)
* 5580 MHz [116] (disabled)
* 5600 MHz [120] (disabled)
* 5620 MHz [124] (disabled)
* 5640 MHz [128] (disabled)
* 5660 MHz [132] (disabled)
* 5680 MHz [136] (disabled)
* 5700 MHz [140] (disabled)
* 5745 MHz [149] (disabled)
* 5765 MHz [153] (disabled)
* 5785 MHz [157] (disabled)
* 5805 MHz [161] (disabled)
* 5825 MHz [165] (disabled)
Which is absurd, because:
Connected to 00:02:6f:6e:d7:6c (on wlan0)
SSID: FFTT5
freq: 5785 [!!!!!!!!!!!]
RX: 72058 bytes (310 packets)
TX: 2568 bytes (20 packets)
signal: -33 dBm
tx bitrate: 6.0 MBit/s
The connection died after a little while, presumably because the AP
was outside of its own allowed band.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-23 19:35 ` Andrew Lutomirski
@ 2010-07-23 20:03 ` Andrew Lutomirski
2010-07-27 23:33 ` Luis R. Rodriguez
2010-07-27 23:32 ` Luis R. Rodriguez
1 sibling, 1 reply; 8+ messages in thread
From: Andrew Lutomirski @ 2010-07-23 20:03 UTC (permalink / raw)
To: linux-wireless
On Fri, Jul 23, 2010 at 3:35 PM, Andrew Lutomirski <luto@mit.edu> wrote:
> On Fri, Jul 23, 2010 at 3:30 PM, Andrew Lutomirski <luto@mit.edu> wrote:
>>
>> Then, after fiddling with an AP for a bit, I got:
>>
>> [11747.264221] cfg80211: Calling CRDA for country: US
>> [11747.282664] cfg80211: Current regulatory domain updated by AP to: US
>> [11747.282672] (start_freq - end_freq @ bandwidth),
>> (max_antenna_gain, max_eirp)
>> [11747.282680] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
>> [11747.282688] (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
>>
>
> It's worse than that. I reconnected to the AP (it appeared to work
> for a few seconds) and I saw:
>
> Wiphy phy0
> [...]
> Band 2:
> Capabilities: 0x872
> HT20/HT40
> Static SM Power Save
> RX Greenfield
> RX HT20 SGI
> RX HT40 SGI
> No RX STBC
> Max AMSDU length: 3839 bytes
> No DSSS/CCK HT40
> Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
> Minimum RX AMPDU time spacing: 4 usec (0x05)
> HT TX/RX MCS rate indexes supported: 0-23, 32
> Frequencies:
> * 5180 MHz [36] (15.0 dBm) (passive scanning, no IBSS)
> * 5200 MHz [40] (15.0 dBm) (passive scanning, no IBSS)
> * 5220 MHz [44] (15.0 dBm) (passive scanning, no IBSS)
> * 5240 MHz [48] (15.0 dBm) (passive scanning, no IBSS)
> * 5260 MHz [52] (15.0 dBm) (passive scanning, no IBSS, radar detection)
> * 5280 MHz [56] (15.0 dBm) (passive scanning, no IBSS, radar detection)
> * 5300 MHz [60] (15.0 dBm) (passive scanning, no IBSS, radar detection)
> * 5320 MHz [64] (15.0 dBm) (passive scanning, no IBSS, radar detection)
> * 5500 MHz [100] (disabled)
> * 5520 MHz [104] (disabled)
> * 5540 MHz [108] (disabled)
> * 5560 MHz [112] (disabled)
> * 5580 MHz [116] (disabled)
> * 5600 MHz [120] (disabled)
> * 5620 MHz [124] (disabled)
> * 5640 MHz [128] (disabled)
> * 5660 MHz [132] (disabled)
> * 5680 MHz [136] (disabled)
> * 5700 MHz [140] (disabled)
> * 5745 MHz [149] (disabled)
> * 5765 MHz [153] (disabled)
> * 5785 MHz [157] (disabled)
> * 5805 MHz [161] (disabled)
> * 5825 MHz [165] (disabled)
>
> Which is absurd, because:
>
> Connected to 00:02:6f:6e:d7:6c (on wlan0)
> SSID: FFTT5
> freq: 5785 [!!!!!!!!!!!]
> RX: 72058 bytes (310 packets)
> TX: 2568 bytes (20 packets)
> signal: -33 dBm
> tx bitrate: 6.0 MBit/s
>
> The connection died after a little while, presumably because the AP
> was outside of its own allowed band.
>
Here's the offending country IE:
Country Information: Country Code: US, Indoor Environment
Tag Number: 7 (Country Information)
Tag length: 6
Tag interpretation: Country Code: US, Indoor Environment
Start Channel: 36, Channels: 13, Max TX Power: 16 dBm
AFAICT net/wireless/reg.c ignores the last bit, and the other APs that
work correctly here don't send country IEs.
--Andy
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-23 20:03 ` Andrew Lutomirski
@ 2010-07-27 23:33 ` Luis R. Rodriguez
2010-07-27 23:46 ` Andrew Lutomirski
0 siblings, 1 reply; 8+ messages in thread
From: Luis R. Rodriguez @ 2010-07-27 23:33 UTC (permalink / raw)
To: Andrew Lutomirski; +Cc: linux-wireless
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-27 23:33 ` Luis R. Rodriguez
@ 2010-07-27 23:46 ` Andrew Lutomirski
2010-07-27 23:51 ` Luis R. Rodriguez
0 siblings, 1 reply; 8+ messages in thread
From: Andrew Lutomirski @ 2010-07-27 23:46 UTC (permalink / raw)
To: Luis R. Rodriguez; +Cc: linux-wireless
On Tue, Jul 27, 2010 at 7:33 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote:
>>
>> AFAICT net/wireless/reg.c ignores the last bit, and the other APs that
>> work correctly here don't send country IEs.
>
> Can you provide the output of iw dev wlan0 scan from a fresh git
> version of iw? That will actually tell me more than your listing.
Unfortunately (or fortunately, I suppose) I can't, because a firmware
upgrade for the AP removed the country IE entirely. But if we're
ignoring that data in 2.6.36 anyway, I'm not too worried. If you
really want that data, I can downgrade the AP the week after next and
get it.
(FWIW, it looks like the Intel driver on Windows refused to work with
that AP but other people with macbooks could use it just fine. I'd
guess that no one would complain if Linux ignored country IEs that
were transmitted outside their own "allowed" band, but this seems to
be moot anyway.)
--Andy
P.S. My thread about the AP that works on 2.6.34 but can't associate
most of the time on 2.6.35-rc6 is the same AP but with the new
firmware.
>
> Luis
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-27 23:46 ` Andrew Lutomirski
@ 2010-07-27 23:51 ` Luis R. Rodriguez
0 siblings, 0 replies; 8+ messages in thread
From: Luis R. Rodriguez @ 2010-07-27 23:51 UTC (permalink / raw)
To: Andrew Lutomirski; +Cc: linux-wireless
On Tue, Jul 27, 2010 at 4:46 PM, Andrew Lutomirski <luto@mit.edu> wrote:
> On Tue, Jul 27, 2010 at 7:33 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote:
>>>
>>> AFAICT net/wireless/reg.c ignores the last bit, and the other APs that
>>> work correctly here don't send country IEs.
>>
>> Can you provide the output of iw dev wlan0 scan from a fresh git
>> version of iw? That will actually tell me more than your listing.
>
> Unfortunately (or fortunately, I suppose) I can't, because a firmware
> upgrade for the AP removed the country IE entirely. But if we're
> ignoring that data in 2.6.36 anyway, I'm not too worried. If you
> really want that data, I can downgrade the AP the week after next and
> get it.
>
> (FWIW, it looks like the Intel driver on Windows refused to work with
> that AP but other people with macbooks could use it just fine. I'd
> guess that no one would complain if Linux ignored country IEs that
> were transmitted outside their own "allowed" band, but this seems to
> be moot anyway.)
If sounds like the AP may have had an issue if the country IE is no
longer present and by the quick looks of your output it could have
been.. so unless you're confident of the AP I would think this is an
AP bug. If its a STA bug for sure though we certainly need to address
the issue on 2.6.35 even if 2.6.36 has a proper fix of ignoring the IE
altogether.
> P.S. My thread about the AP that works on 2.6.34 but can't associate
> most of the time on 2.6.35-rc6 is the same AP but with the new
> firmware.
Wonderful.
Luis
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-23 19:35 ` Andrew Lutomirski
2010-07-23 20:03 ` Andrew Lutomirski
@ 2010-07-27 23:32 ` Luis R. Rodriguez
1 sibling, 0 replies; 8+ messages in thread
From: Luis R. Rodriguez @ 2010-07-27 23:32 UTC (permalink / raw)
To: Andrew Lutomirski; +Cc: linux-wireless
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: regulatory hiccup
2010-07-23 19:30 regulatory hiccup Andrew Lutomirski
2010-07-23 19:35 ` Andrew Lutomirski
@ 2010-07-27 23:30 ` Luis R. Rodriguez
1 sibling, 0 replies; 8+ messages in thread
From: Luis R. Rodriguez @ 2010-07-27 23:30 UTC (permalink / raw)
To: Andrew Lutomirski; +Cc: linux-wireless
On Fri, Jul 23, 2010 at 12:30 PM, Andrew Lutomirski <luto@mit.edu> wrote:
> This is 2.6.35-rc4, but this bug (?) might exist in other versions ,too.
>
> Early in boot, all was well:
>
> [ 5524.214376] cfg80211: Calling CRDA to update world regulatory domain
> [ 5524.219025] cfg80211: Calling CRDA for country: US
> [ 5524.238440] cfg80211: Regulatory domain changed to country: US
> [ 5524.238443] (start_freq - end_freq @ bandwidth),
> (max_antenna_gain, max_eirp)
> [ 5524.238446] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
> [ 5524.238448] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
> [ 5524.238451] (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> [ 5524.238454] (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> [ 5524.238456] (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> [ 5524.238459] (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
>
> Then, after fiddling with an AP for a bit, I got:
>
> [11747.264221] cfg80211: Calling CRDA for country: US
> [11747.282664] cfg80211: Current regulatory domain updated by AP to: US
> [11747.282672] (start_freq - end_freq @ bandwidth),
> (max_antenna_gain, max_eirp)
> [11747.282680] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
> [11747.282688] (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 1600 mBm)
>
> (Note lots of missing channels after that.) iw phy phy0 info showed
> all the channels above 5.33GHz disabled. I didn't see some other APs
> that were there.
>
> Later on I disconnected, CRDA got called again, and all was well.
>
> The AP that I had just connected to when everything broke was an
> EnGenuis ESR7750 (brand new), and maybe it sent something wrong, but
> surely if it says US it shouldn't disable other APs on US bands that
> CRDA says is OK.
If you are saying the the AP's Country IE is a subset of what CRDA has
and complaining that we follow that, yes that is true. We were being
very careful and only recently revisited this again with our
regulatory folks. It was determined to be fair to disregard the AP's
own regulatory data and follow our own since we do keep good tabs on
our wireless-regdb. Patches for that were sent by Linville and will be
part of 2.6.36, you can either cherry pick those or wait for
2.6.36-rc1 or the respective compat-wireless-2.6.36-rc1
Luis
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2010-07-27 23:51 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2010-07-23 19:30 regulatory hiccup Andrew Lutomirski
2010-07-23 19:35 ` Andrew Lutomirski
2010-07-23 20:03 ` Andrew Lutomirski
2010-07-27 23:33 ` Luis R. Rodriguez
2010-07-27 23:46 ` Andrew Lutomirski
2010-07-27 23:51 ` Luis R. Rodriguez
2010-07-27 23:32 ` Luis R. Rodriguez
2010-07-27 23:30 ` Luis R. Rodriguez
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