USB MediaTek MT7921AU DFS channels scan fail
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Description
Not able to use DFS channels on a USB MediaTek MT7921AU 802.11ac/ax/b/g/n dongle in AP mode. Non DFS channels work correctly.
This is using OpenWrt SNAPSHOT r24154+5-6f31941d38 on x86/64
Sun Oct 22 19:17:36 2023 daemon.notice netifd: Wireless device 'radio0' is now up
Sun Oct 22 19:17:36 2023 daemon.notice hostapd: phy0-ap0: interface state HT_SCAN->DFS
Sun Oct 22 19:17:36 2023 daemon.notice hostapd: phy0-ap0: DFS-CAC-START freq=5700 chan=140 sec_chan=1, width=1, seg0=138, seg1=0, cac_time=60s
Sun Oct 22 19:17:36 2023 daemon.err hostapd: DFS start_dfs_cac() failed, -1
Sun Oct 22 19:17:36 2023 daemon.err hostapd: Interface initialization failed
Sun Oct 22 19:17:36 2023 daemon.notice hostapd: phy0-ap0: interface state DFS->DISABLED
Sun Oct 22 19:17:36 2023 daemon.notice hostapd: phy0-ap0: AP-DISABLED
config wifi-device 'radio0'
option type 'mac80211'
option path 'pci0000:00/0000:00:14.0/usb2/2-1/2-1:1.0'
option channel '140'
option band '5g'
option htmode 'HE80'
option country 'ES'
option cell_density '0'
config wifi-iface 'wifinet0'
option device 'radio0'
option mode 'ap'
option ssid 'OpenWrt'
option encryption 'psk2'
option key 'wiphykey'
option network 'lan'
[ 6.889781] mt7921u 2-1:1.0: HW/SW Version: 0x8a108a10, Build Time: 20230526130917a
[ 6.901516] mt7921u 2-1:1.0: WM Firmware Version: ____010000, Build Time: 20230526130958
phy0-ap0 ESSID: "OpenWrt"
Access Point: 90:DE:80:D6:96:FD
Mode: Master Channel: 140 (6.650 GHz) HT Mode: NOHT
Center Channel 1: unknown 2: unknown
Tx-Power: 3 dBm Link Quality: unknown/70
Signal: unknown Noise: unknown
Bit Rate: unknown
Encryption: WPA2 PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11ac/ax/b/g/n
Hardware: USB 0E8D:7961 [MediaTek MT7921AU]
TX power offset: none
Frequency offset: none
Supports VAPs: no PHY name: phy0
phy0-ap0 ESSID: "OpenWrt"
Access Point: 90:DE:80:D6:96:FD
Mode: Master Channel: 140 (6.650 GHz) HT Mode: NOHT
Center Channel 1: unknown 2: unknown
Tx-Power: 3 dBm Link Quality: unknown/70
Signal: unknown Noise: unknown
Bit Rate: unknown
Encryption: WPA2 PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11ac/ax/b/g/n
Hardware: USB 0E8D:7961 [MediaTek MT7921AU]
TX power offset: none
Frequency offset: none
Supports VAPs: no PHY name: phy0`
`Wiphy phy0
wiphy index: 0
max # scan SSIDs: 4
max scan IEs length: 482 bytes
max # sched scan SSIDs: 10
max # match sets: 16
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports AP-side u-APSD.
Device supports T-DLS.
Supported Ciphers:
* WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5)
* TKIP (00-0f-ac:2)
* CCMP-128 (00-0f-ac:4)
* CCMP-256 (00-0f-ac:10)
* GCMP-128 (00-0f-ac:8)
* GCMP-256 (00-0f-ac:9)
* CMAC (00-0f-ac:6)
* CMAC-256 (00-0f-ac:13)
* GMAC-128 (00-0f-ac:11)
* GMAC-256 (00-0f-ac:12)
Available Antennas: TX 0x3 RX 0x3
Configured Antennas: TX 0x3 RX 0x3
Supported interface modes:
* managed
* AP
* AP/VLAN
* monitor
* P2P-client
* P2P-GO
Band 1:
Capabilities: 0x9ff
RX LDPC
HT20/HT40
SM Power Save disabled
RX Greenfield
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: No restriction (0x00)
HT TX/RX MCS rate indexes supported: 0-15
HE Iftypes: managed
HE MAC Capabilities (0x08011a000040):
+HTC HE Supported
Trigger Frame MAC Padding Duration: 2
OM Control
Maximum A-MPDU Length Exponent: 3
A-MSDU in A-MPDU
HE PHY Capabilities: (0x2270ce120dc0b306423f00):
HE40/2.4GHz
242 tone RUs/2.4GHz
Device Class: 1
LDPC Coding in Payload
HE SU PPDU with 1x HE-LTF and 0.8us GI
NDP with 4x HE-LTF and 3.2us GI
STBC Tx <= 80MHz
STBC Rx <= 80MHz
Full Bandwidth UL MU-MIMO
Partial Bandwidth UL MU-MIMO
DCM Max Constellation: 2
DCM Max Constellation Rx: 2
SU Beamformee
Beamformee STS <= 80Mhz: 3
Ng = 16 SU Feedback
Ng = 16 MU Feedback
Codebook Size SU Feedback
Codebook Size MU Feedback
Triggered CQI Feedback
Partial Bandwidth Extended Range
PPE Threshold Present
Power Boost Factor ar
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
DCM Max BW: 1
Longer Than 16HE SIG-B OFDM Symbols
Non-Triggered CQI Feedback
TX 1024-QAM
RX 1024-QAM
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x39 0x1c 0xc7 0x71 0x1c 0x07
EHT Iftypes: managed
EHT MAC Capabilities (0x0000):
EHT PHY Capabilities: (0x0000000000000000):
EHT MCS/NSS: (0x):
EHT bw=20 MHz, max NSS for MCS 0-7: Rx=0, Tx=0
EHT bw=20 MHz, max NSS for MCS 8-9: Rx=0, Tx=0
EHT bw=20 MHz, max NSS for MCS 10-11: Rx=0, Tx=0
EHT bw=20 MHz, max NSS for MCS 12-13: Rx=0, Tx=0
HE Iftypes: AP
HE MAC Capabilities (0x00011a081044):
+HTC HE Supported
BSR
OM Control
Maximum A-MPDU Length Exponent: 3
BQR
A-MSDU in A-MPDU
OM Control UL MU Data Disable RX
HE PHY Capabilities: (0x0220ce120000a000000c00):
HE40/2.4GHz
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
STBC Tx <= 80MHz
STBC Rx <= 80MHz
Full Bandwidth UL MU-MIMO
Partial Bandwidth UL MU-MIMO
DCM Max Constellation: 2
DCM Max Constellation Rx: 2
Partial Bandwidth Extended Range
PPE Threshold Present
TX 1024-QAM
RX 1024-QAM
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x39 0x1c 0xc7 0x71 0x1c 0x07
EHT Iftypes: AP
EHT MAC Capabilities (0x0000):
EHT PHY Capabilities: (0x0000000000000000):
EHT MCS/NSS: (0x):
EHT bw=20 MHz, max NSS for MCS 0-7: Rx=0, Tx=0
EHT bw=20 MHz, max NSS for MCS 8-9: Rx=0, Tx=0
EHT bw=20 MHz, max NSS for MCS 10-11: Rx=0, Tx=0
EHT bw=20 MHz, max NSS for MCS 12-13: Rx=0, Tx=0
Bitrates (non-HT):
* 1.0 Mbps (short preamble supported)
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
* 2484 MHz [14] (disabled)
Band 2:
Capabilities: 0x9ff
RX LDPC
HT20/HT40
SM Power Save disabled
RX Greenfield
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: No restriction (0x00)
HT TX/RX MCS rate indexes supported: 0-15
VHT Capabilities (0x339071b2):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
TX STBC
SU Beamformee
MU Beamformee
RX antenna pattern consistency
TX antenna pattern consistency
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
VHT extended NSS: supported
HE Iftypes: managed
HE MAC Capabilities (0x08011a000040):
+HTC HE Supported
Trigger Frame MAC Padding Duration: 2
OM Control
Maximum A-MPDU Length Exponent: 3
A-MSDU in A-MPDU
HE PHY Capabilities: (0x4470ce120dc0b306423f00):
HE40/HE80/5GHz
242 tone RUs/5GHz
Device Class: 1
LDPC Coding in Payload
HE SU PPDU with 1x HE-LTF and 0.8us GI
NDP with 4x HE-LTF and 3.2us GI
STBC Tx <= 80MHz
STBC Rx <= 80MHz
Full Bandwidth UL MU-MIMO
Partial Bandwidth UL MU-MIMO
DCM Max Constellation: 2
DCM Max Constellation Rx: 2
SU Beamformee
Beamformee STS <= 80Mhz: 3
Ng = 16 SU Feedback
Ng = 16 MU Feedback
Codebook Size SU Feedback
Codebook Size MU Feedback
Triggered CQI Feedback
Partial Bandwidth Extended Range
PPE Threshold Present
Power Boost Factor ar
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
DCM Max BW: 1
Longer Than 16HE SIG-B OFDM Symbols
Non-Triggered CQI Feedback
TX 1024-QAM
RX 1024-QAM
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x39 0x1c 0xc7 0x71 0x1c 0x07
EHT Iftypes: managed
EHT MAC Capabilities (0x0000):
EHT PHY Capabilities: (0x0000000000000000):
EHT MCS/NSS: (0x):
EHT bw <= 80 MHz, max NSS for MCS 8-9: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 10-11: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 12-13: Rx=0, Tx=0
HE Iftypes: AP
HE MAC Capabilities (0x00011a081044):
+HTC HE Supported
BSR
OM Control
Maximum A-MPDU Length Exponent: 3
BQR
A-MSDU in A-MPDU
OM Control UL MU Data Disable RX
HE PHY Capabilities: (0x0420ce120000a000000c00):
HE40/HE80/5GHz
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
STBC Tx <= 80MHz
STBC Rx <= 80MHz
Full Bandwidth UL MU-MIMO
Partial Bandwidth UL MU-MIMO
DCM Max Constellation: 2
DCM Max Constellation Rx: 2
Partial Bandwidth Extended Range
PPE Threshold Present
TX 1024-QAM
RX 1024-QAM
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x39 0x1c 0xc7 0x71 0x1c 0x07
EHT Iftypes: AP
EHT MAC Capabilities (0x0000):
EHT PHY Capabilities: (0x0000000000000000):
EHT MCS/NSS: (0x):
EHT bw <= 80 MHz, max NSS for MCS 8-9: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 10-11: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 12-13: Rx=0, Tx=0
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 5180 MHz [36] (23.0 dBm)
* 5200 MHz [40] (23.0 dBm)
* 5220 MHz [44] (23.0 dBm)
* 5240 MHz [48] (23.0 dBm)
* 5260 MHz [52] (20.0 dBm) (radar detection)
* 5280 MHz [56] (20.0 dBm) (radar detection)
* 5300 MHz [60] (20.0 dBm) (radar detection)
* 5320 MHz [64] (20.0 dBm) (radar detection)
* 5500 MHz [100] (26.0 dBm) (radar detection)
* 5520 MHz [104] (26.0 dBm) (radar detection)
* 5540 MHz [108] (26.0 dBm) (radar detection)
* 5560 MHz [112] (26.0 dBm) (radar detection)
* 5580 MHz [116] (26.0 dBm) (radar detection)
* 5600 MHz [120] (26.0 dBm) (radar detection)
* 5620 MHz [124] (26.0 dBm) (radar detection)
* 5640 MHz [128] (26.0 dBm) (radar detection)
* 5660 MHz [132] (26.0 dBm) (radar detection)
* 5680 MHz [136] (26.0 dBm) (radar detection)
* 5700 MHz [140] (26.0 dBm) (radar detection)
* 5720 MHz [144] (13.0 dBm) (radar detection)
* 5745 MHz [149] (13.0 dBm)
* 5765 MHz [153] (13.0 dBm)
* 5785 MHz [157] (13.0 dBm)
* 5805 MHz [161] (13.0 dBm)
* 5825 MHz [165] (13.0 dBm)
* 5845 MHz [169] (13.0 dBm)
* 5865 MHz [173] (13.0 dBm)
* 5885 MHz [177] (disabled)
Band 4:
HE Iftypes: managed
HE MAC Capabilities (0x08011a000040):
+HTC HE Supported
Trigger Frame MAC Padding Duration: 2
OM Control
Maximum A-MPDU Length Exponent: 3
A-MSDU in A-MPDU
HE PHY Capabilities: (0x4470ce120dc0b306423f00):
HE40/HE80/5GHz
242 tone RUs/5GHz
Device Class: 1
LDPC Coding in Payload
HE SU PPDU with 1x HE-LTF and 0.8us GI
NDP with 4x HE-LTF and 3.2us GI
STBC Tx <= 80MHz
STBC Rx <= 80MHz
Full Bandwidth UL MU-MIMO
Partial Bandwidth UL MU-MIMO
DCM Max Constellation: 2
DCM Max Constellation Rx: 2
SU Beamformee
Beamformee STS <= 80Mhz: 3
Ng = 16 SU Feedback
Ng = 16 MU Feedback
Codebook Size SU Feedback
Codebook Size MU Feedback
Triggered CQI Feedback
Partial Bandwidth Extended Range
PPE Threshold Present
Power Boost Factor ar
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
DCM Max BW: 1
Longer Than 16HE SIG-B OFDM Symbols
Non-Triggered CQI Feedback
TX 1024-QAM
RX 1024-QAM
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x39 0x1c 0xc7 0x71 0x1c 0x07
EHT Iftypes: managed
EHT MAC Capabilities (0x0000):
EHT PHY Capabilities: (0x0000000000000000):
EHT MCS/NSS: (0x):
EHT bw <= 80 MHz, max NSS for MCS 8-9: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 10-11: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 12-13: Rx=0, Tx=0
HE Iftypes: AP
HE MAC Capabilities (0x00011a081044):
+HTC HE Supported
BSR
OM Control
Maximum A-MPDU Length Exponent: 3
BQR
A-MSDU in A-MPDU
OM Control UL MU Data Disable RX
HE PHY Capabilities: (0x0420ce120000a000000c00):
HE40/HE80/5GHz
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
STBC Tx <= 80MHz
STBC Rx <= 80MHz
Full Bandwidth UL MU-MIMO
Partial Bandwidth UL MU-MIMO
DCM Max Constellation: 2
DCM Max Constellation Rx: 2
Partial Bandwidth Extended Range
PPE Threshold Present
TX 1024-QAM
RX 1024-QAM
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x39 0x1c 0xc7 0x71 0x1c 0x07
EHT Iftypes: AP
EHT MAC Capabilities (0x0000):
EHT PHY Capabilities: (0x0000000000000000):
EHT MCS/NSS: (0x):
EHT bw <= 80 MHz, max NSS for MCS 8-9: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 10-11: Rx=0, Tx=0
EHT bw <= 80 MHz, max NSS for MCS 12-13: Rx=0, Tx=0
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 5955 MHz [1] (23.0 dBm)
* 5975 MHz [5] (23.0 dBm)
* 5995 MHz [9] (23.0 dBm)
* 6015 MHz [13] (23.0 dBm)
* 6035 MHz [17] (23.0 dBm)
* 6055 MHz [21] (23.0 dBm)
* 6075 MHz [25] (23.0 dBm)
* 6095 MHz [29] (23.0 dBm)
* 6115 MHz [33] (23.0 dBm)
* 6135 MHz [37] (23.0 dBm)
* 6155 MHz [41] (23.0 dBm)
* 6175 MHz [45] (23.0 dBm)
* 6195 MHz [49] (23.0 dBm)
* 6215 MHz [53] (23.0 dBm)
* 6235 MHz [57] (23.0 dBm)
* 6255 MHz [61] (23.0 dBm)
* 6275 MHz [65] (23.0 dBm)
* 6295 MHz [69] (23.0 dBm)
* 6315 MHz [73] (23.0 dBm)
* 6335 MHz [77] (23.0 dBm)
* 6355 MHz [81] (23.0 dBm)
* 6375 MHz [85] (23.0 dBm)
* 6395 MHz [89] (23.0 dBm)
* 6415 MHz [93] (23.0 dBm)
* 6435 MHz [97] (disabled)
* 6455 MHz [101] (disabled)
* 6475 MHz [105] (disabled)
* 6495 MHz [109] (disabled)
* 6515 MHz [113] (disabled)
* 6535 MHz [117] (disabled)
* 6555 MHz [121] (disabled)
* 6575 MHz [125] (disabled)
* 6595 MHz [129] (disabled)
* 6615 MHz [133] (disabled)
* 6635 MHz [137] (disabled)
* 6655 MHz [141] (disabled)
* 6675 MHz [145] (disabled)
* 6695 MHz [149] (disabled)
* 6715 MHz [153] (disabled)
* 6735 MHz [157] (disabled)
* 6755 MHz [161] (disabled)
* 6775 MHz [165] (disabled)
* 6795 MHz [169] (disabled)
* 6815 MHz [173] (disabled)
* 6835 MHz [177] (disabled)
* 6855 MHz [181] (disabled)
* 6875 MHz [185] (disabled)
* 6895 MHz [189] (disabled)
* 6915 MHz [193] (disabled)
* 6935 MHz [197] (disabled)
* 6955 MHz [201] (disabled)
* 6975 MHz [205] (disabled)
* 6995 MHz [209] (disabled)
* 7015 MHz [213] (disabled)
* 7035 MHz [217] (disabled)
* 7055 MHz [221] (disabled)
* 7075 MHz [225] (disabled)
* 7095 MHz [229] (disabled)
* 7115 MHz [233] (disabled)
Supported commands:
* new_interface
* set_interface
* new_key
* start_ap
* new_station
* new_mpath
* set_mesh_config
* set_bss
* authenticate
* associate
* deauthenticate
* disassociate
* join_ibss
* join_mesh
* remain_on_channel
* set_tx_bitrate_mask
* frame
* frame_wait_cancel
* set_wiphy_netns
* set_channel
* tdls_mgmt
* tdls_oper
* start_sched_scan
* probe_client
* set_noack_map
* register_beacons
* start_p2p_device
* set_mcast_rate
* connect
* disconnect
* channel_switch
* set_qos_map
* set_multicast_to_unicast
* set_sar_specs
WoWLAN support:
* wake up on disconnect
* wake up on magic packet
* wake up on pattern match, up to 1 patterns of 1-128 bytes,
maximum packet offset 0 bytes
* can do GTK rekeying
* wake up on network detection, up to 10 match sets
software interface modes (can always be added):
* AP/VLAN
* monitor
valid interface combinations:
* #{ managed, P2P-client } <= 2, #{ AP, P2P-GO } <= 1,
total <= 2, #channels <= 2
HT Capability overrides:
* MCS: ff ff ff ff ff ff ff ff ff ff
* maximum A-MSDU length
* supported channel width
* short GI for 40 MHz
* max A-MPDU length exponent
* min MPDU start spacing
Device supports TX status socket option.
Device supports HT-IBSS.
Device supports SAE with AUTHENTICATE command
Device supports scan flush.
Device supports per-vif TX power setting
Driver supports full state transitions for AP/GO clients
Driver supports a userspace MPM
Device supports active monitor (which will ACK incoming frames)
Driver/device bandwidth changes during BSS lifetime (AP/GO mode)
Device supports configuring vdev MAC-addr on create.
Device supports randomizing MAC-addr in scans.
Device supports randomizing MAC-addr in sched scans.
max # scan plans: 1
max scan plan interval: 65535
max scan plan iterations: 0
Supported TX frame types:
* IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
Supported RX frame types:
* IBSS: 0x40 0xb0 0xc0 0xd0
* managed: 0x40 0xb0 0xd0
* AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* mesh point: 0xb0 0xc0 0xd0
* P2P-client: 0x40 0xd0
* P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-device: 0x40 0xd0
Supported extended features:
* [ RRM ]: RRM
* [ SET_SCAN_DWELL ]: scan dwell setting
* [ BEACON_RATE_LEGACY ]: legacy beacon rate setting
* [ BEACON_RATE_HT ]: HT beacon rate setting
* [ BEACON_RATE_VHT ]: VHT beacon rate setting
* [ FILS_STA ]: STA FILS (Fast Initial Link Setup)
* [ CQM_RSSI_LIST ]: multiple CQM_RSSI_THOLD records
* [ CONTROL_PORT_OVER_NL80211 ]: control port over nl80211
* [ ACK_SIGNAL_SUPPORT ]: ack signal level support
* [ TXQS ]: FQ-CoDel-enabled intermediate TXQs
* [ CAN_REPLACE_PTK0 ]: can safely replace PTK 0 when rekeying
* [ AIRTIME_FAIRNESS ]: airtime fairness scheduling
* [ AQL ]: Airtime Queue Limits (AQL)
* [ CONTROL_PORT_NO_PREAUTH ]: disable pre-auth over nl80211 control port support
* [ SCAN_FREQ_KHZ ]: scan on kHz frequency support
* [ CONTROL_PORT_OVER_NL80211_TX_STATUS ]: tx status for nl80211 control port support
* [ BEACON_RATE_HE ]: HE beacon rate support (AP/mesh)
```Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the MT7921AU AP configuration on OpenWrt with channel 140 and compare it with a non-DFS channel. Inspect the mt7921u/mac80211 path around the hostapd DFS-CAC-START failure shown in the logs. Done means DFS channels initialize successfully in AP mode without the reported interface initialization failure.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100