When my system (using an Intel 6300) associates to the AP here, it says:
wlan0: authenticate with [MAC]
wlan0: capabilities/regulatory prevented using AP HT/VHT
configuration, downgraded
Despite this warning, HT seems to work. I'm getting >7 MB/s over ssh,
which isn't terrible.
$ sudo iw wlan0 link
Connected to [MAC] (on wlan0)
SSID: [omitted]
freq: 2432
RX: 421276864 bytes (301704 packets)
TX: 5148186 bytes (46101 packets)
signal: -47 dBm
tx bitrate: 270.0 MBit/s MCS 14 40Mhz short GI
bss flags: short-preamble short-slot-time
dtim period: 2
beacon int: 100
That's a nice high MCS rate at 40MHz.
$ sudo iw dev wlan0 scan dump
BSS [MAC] (on wlan0) -- associated
TSF: 126363129751 usec (1d, 11:06:03)
freq: 2432
beacon interval: 100
capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
signal: -39.00 dBm
last seen: 30251 ms ago
Information elements from Probe Response frame:
SSID: [omitted]
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
DS Parameter set: channel 5
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: (0x0000)
ERP: <no flags>
Extended supported rates: 24.0 36.0 48.0 54.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
HT capabilities:
Capabilities: 0x11ce
HT20/HT40
SM Power Save disabled
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 8 usec (0x06)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 5
* secondary channel offset: below
* STA channel width: any
* RIFS: 0
* HT protection: non-HT mixed
* non-GF present: 0
* OBSS non-GF present: 1
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* AP setup locked: 0x01
* Response Type: 3 (AP)
* UUID: 00000000-0000-1000-0000-74440171ae50
* Manufacturer: Netgear
* Model: WNDR3800
* Model Number: V1
* Serial Number: none
* Primary Device Type: 6-0050f204-1
* Device name: WNDR3800(Wireless AP)
* Config methods: Ethernet, Label, PBC
* RF Bands: 0x3
What's happening here?
On Sat, 2013-03-30 at 18:49 -0700, Andrew Lutomirski wrote:
> wlan0: capabilities/regulatory prevented using AP HT/VHT
> configuration, downgraded
>
> Despite this warning, HT seems to work. I'm getting >7 MB/s over ssh,
> which isn't terrible.
Yeah, the warning is spurious, it's disabling VHT because neither you
nor the AP have it ;-)
I fixed it in
commit 586e01ededf9b713a1512dd658806791a7ca1a50
Author: Johannes Berg <[email protected]>
Date: Thu Feb 14 12:13:53 2013 +0100
mac80211: prevent spurious HT/VHT downgrade message
but I guess that didn't make it to 3.8, maybe it should be applied to
stable.
johannes
On Mon, Apr 01, 2013 at 12:02:04AM +0200, Johannes Berg wrote:
> On Sat, 2013-03-30 at 18:49 -0700, Andrew Lutomirski wrote:
>
> > wlan0: capabilities/regulatory prevented using AP HT/VHT
> > configuration, downgraded
> >
> > Despite this warning, HT seems to work. I'm getting >7 MB/s over ssh,
> > which isn't terrible.
>
> Yeah, the warning is spurious, it's disabling VHT because neither you
> nor the AP have it ;-)
>
> I fixed it in
>
> commit 586e01ededf9b713a1512dd658806791a7ca1a50
> Author: Johannes Berg <[email protected]>
> Date: Thu Feb 14 12:13:53 2013 +0100
>
> mac80211: prevent spurious HT/VHT downgrade message
>
> but I guess that didn't make it to 3.8, maybe it should be applied to
> stable.
Now applied, thanks.
greg k-h