openwrt / openwrt/mt76

mt76->mt7915e: download speed is half upload speed on MT7981 chipset

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Description

So, I'm currently on a MT7981 device with a 2x2 spatial streams. Everything is working very well, except that the download speeds are WAY slower than upload speeds. During iperf3 tests (also does apply to real-world tests using Ookla speedtest):

  • Average upload speed: 1.59 Gbps
  • Average download speed: 850Mbps

Things that I have tried:

  • Patching the driver to load the proprietary .bin firmware from Mediatek.
  • Playing with options in /etc/config/wireless.
  • Testing with UDP on iperf3 to discard any TCP-specific issue.
  • Monitoring the TX bitrates during tests, they are stable at 2.4Gbps, using MCS 10/12 usually.

I'm 100% sure that it's a driver/firmware issue. With the original firmware, which is a private fork of OpenWrt, it gets the expected download speeds. Sadly, that version doesn't have a way to configure many things via uci, and therefore is not suitable for me.

The firmware has been tested on multiple devices and the result is the same on each one, that's why I'm 100% sure that it's an issue with the firmware. Flashing the old image also returns the correct behavior back.

The current loaded modules are:

cfg80211              319488  4 mt7915e,mt76_connac_lib,mt76,mac80211
mac80211              614400  3 mt7915e,mt76_connac_lib,mt76
mt76                   77824  2 mt7915e,mt76_connac_lib
mt76_connac_lib        49152  1 mt7915e
mt7915e               245760  0

Some data from the tests:

Upload
$ iperf3 --bind-dev wlan0 -c 192.168.1.1 -t 86400 -P4
Connecting to host 192.168.1.1, port 5201
[  5] local 192.168.1.229 port 34484 connected to 192.168.1.1 port 5201
[  7] local 192.168.1.229 port 34488 connected to 192.168.1.1 port 5201
[  9] local 192.168.1.229 port 34490 connected to 192.168.1.1 port 5201
[ 11] local 192.168.1.229 port 34496 connected to 192.168.1.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  67.1 MBytes   563 Mbits/sec    0   1.27 MBytes       
[  7]   0.00-1.00   sec  31.5 MBytes   264 Mbits/sec    0   1.26 MBytes       
[  9]   0.00-1.00   sec  74.4 MBytes   624 Mbits/sec    0   1.79 MBytes       
[ 11]   0.00-1.00   sec  49.0 MBytes   411 Mbits/sec    0   1.28 MBytes       
[SUM]   0.00-1.00   sec   222 MBytes  1.86 Gbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  54.1 MBytes   454 Mbits/sec    0   1.27 MBytes       
[  7]   1.00-2.00   sec  51.0 MBytes   428 Mbits/sec    0   1.26 MBytes       
[  9]   1.00-2.00   sec  53.6 MBytes   450 Mbits/sec    0   1.79 MBytes       
[ 11]   1.00-2.00   sec  53.4 MBytes   448 Mbits/sec    0   1.28 MBytes       
[SUM]   1.00-2.00   sec   212 MBytes  1.78 Gbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  52.4 MBytes   439 Mbits/sec    0   1.27 MBytes       
[  7]   2.00-3.00   sec  50.5 MBytes   424 Mbits/sec    0   1.26 MBytes       
[  9]   2.00-3.00   sec  52.4 MBytes   439 Mbits/sec    0   1.79 MBytes       
[ 11]   2.00-3.00   sec  53.9 MBytes   452 Mbits/sec    0   1.28 MBytes       
[SUM]   2.00-3.00   sec   209 MBytes  1.75 Gbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  52.6 MBytes   441 Mbits/sec    0   1.27 MBytes       
[  7]   3.00-4.00   sec  49.2 MBytes   413 Mbits/sec    0   1.26 MBytes       
[  9]   3.00-4.00   sec  52.9 MBytes   443 Mbits/sec    0   1.79 MBytes       
[ 11]   3.00-4.00   sec  52.1 MBytes   437 Mbits/sec    0   1.28 MBytes       
[SUM]   3.00-4.00   sec   207 MBytes  1.73 Gbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  53.2 MBytes   447 Mbits/sec    0   1.27 MBytes       
[  7]   4.00-5.00   sec  51.8 MBytes   434 Mbits/sec    0   1.26 MBytes       
[  9]   4.00-5.00   sec  57.5 MBytes   482 Mbits/sec    0   1.79 MBytes       
[ 11]   4.00-5.00   sec  54.2 MBytes   455 Mbits/sec    0   1.28 MBytes       
[SUM]   4.00-5.00   sec   217 MBytes  1.82 Gbits/sec    0             
^C- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-5.89   sec  44.6 MBytes   422 Mbits/sec    0   1.27 MBytes       
[  7]   5.00-5.89   sec  44.1 MBytes   417 Mbits/sec    0   1.26 MBytes       
[  9]   5.00-5.89   sec  50.4 MBytes   476 Mbits/sec    0   1.79 MBytes       
[ 11]   5.00-5.89   sec  44.6 MBytes   422 Mbits/sec    0   1.28 MBytes       
[SUM]   5.00-5.89   sec   184 MBytes  1.74 Gbits/sec    0
Download
$ iperf3 --bind-dev wlan0 -c 192.168.1.1 -t 86400 -P4 --reverse 
Connecting to host 192.168.1.1, port 5201
Reverse mode, remote host 192.168.1.1 is sending
[  5] local 192.168.1.229 port 58384 connected to 192.168.1.1 port 5201
[  7] local 192.168.1.229 port 58386 connected to 192.168.1.1 port 5201
[  9] local 192.168.1.229 port 58396 connected to 192.168.1.1 port 5201
[ 11] local 192.168.1.229 port 58402 connected to 192.168.1.1 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  29.9 MBytes   251 Mbits/sec                  
[  7]   0.00-1.00   sec  27.8 MBytes   233 Mbits/sec                  
[  9]   0.00-1.00   sec  21.2 MBytes   178 Mbits/sec                  
[ 11]   0.00-1.00   sec  21.9 MBytes   183 Mbits/sec                  
[SUM]   0.00-1.00   sec   101 MBytes   845 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  27.4 MBytes   230 Mbits/sec                  
[  7]   1.00-2.00   sec  24.2 MBytes   203 Mbits/sec                  
[  9]   1.00-2.00   sec  24.4 MBytes   204 Mbits/sec                  
[ 11]   1.00-2.00   sec  24.2 MBytes   203 Mbits/sec                  
[SUM]   1.00-2.00   sec   100 MBytes   841 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  26.1 MBytes   219 Mbits/sec                  
[  7]   2.00-3.00   sec  24.2 MBytes   203 Mbits/sec                  
[  9]   2.00-3.00   sec  24.2 MBytes   203 Mbits/sec                  
[ 11]   2.00-3.00   sec  24.2 MBytes   203 Mbits/sec                  
[SUM]   2.00-3.00   sec  98.9 MBytes   829 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  26.5 MBytes   222 Mbits/sec                  
[  7]   3.00-4.00   sec  24.2 MBytes   203 Mbits/sec                  
[  9]   3.00-4.00   sec  24.4 MBytes   204 Mbits/sec                  
[ 11]   3.00-4.00   sec  24.0 MBytes   201 Mbits/sec                  
[SUM]   3.00-4.00   sec  99.1 MBytes   832 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  24.9 MBytes   209 Mbits/sec                  
[  7]   4.00-5.00   sec  24.1 MBytes   202 Mbits/sec                  
[  9]   4.00-5.00   sec  24.8 MBytes   208 Mbits/sec                  
[ 11]   4.00-5.00   sec  24.0 MBytes   201 Mbits/sec                  
[SUM]   4.00-5.00   sec  97.8 MBytes   820 Mbits/sec                  
^C- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-5.31   sec  7.25 MBytes   199 Mbits/sec                  
[  7]   5.00-5.31   sec  7.25 MBytes   199 Mbits/sec                  
[  9]   5.00-5.31   sec  8.12 MBytes   223 Mbits/sec                  
[ 11]   5.00-5.31   sec  7.38 MBytes   203 Mbits/sec                  
[SUM]   5.00-5.31   sec  30.0 MBytes   825 Mbits/sec
iw phy1 info
iw info 
Wiphy phy1
	wiphy index: 1
	max # scan SSIDs: 4
	max scan IEs length: 2190 bytes
	max # sched scan SSIDs: 0
	max # match sets: 0
	Retry short limit: 7
	Retry long limit: 4
	Coverage class: 0 (up to 0m)
	Device supports RSN-IBSS.
	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:
		 * IBSS
		 * managed
		 * AP
		 * AP/VLAN
		 * monitor
		 * mesh point
		 * P2P-client
		 * P2P-GO
	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: 2 usec (0x04)
		HT TX/RX MCS rate indexes supported: 0-15
		VHT Capabilities (0x339a59f6):
			Max MPDU length: 11454
			Supported Channel Width: 160 MHz
			RX LDPC
			short GI (80 MHz)
			short GI (160/80+80 MHz)
			TX STBC
			SU Beamformer
			SU Beamformee
			MU Beamformer
			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: (0x4c70ce926d12f3164e3f00):
				HE40/HE80/5GHz
				HE160/5GHz
				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 Beamformer
				SU Beamformee
				Beamformee STS <= 80Mhz: 3
				Beamformee STS > 80Mhz: 3
				Sounding Dimensions <= 80Mhz: 2
				Sounding Dimensions > 80Mhz: 2
				Codebook Size SU Feedback
				Codebook Size MU Feedback
				Triggered CQI Feedback
				Partial Bandwidth Extended Range
				Partial Bandwidth DL MU-MIMO
				PPE Threshold Present
				Power Boost Factor ar
				HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
				Max NC: 2
				20MHz in 40MHz HE PPDU 2.4GHz
				20MHz in 160/80+80MHz HE PPDU
				80MHz in 160/80+80MHz HE PPDU
				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
			HE RX MCS and NSS set 160 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 160 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 
		HE Iftypes: AP
			HE MAC Capabilities (0x00051a081044):
				+HTC HE Supported
				TWT Responder
				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: (0x0c20ce926f12afd0000c00):
				HE40/HE80/5GHz
				HE160/5GHz
				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
				SU Beamformer
				SU Beamformee
				MU Beamformer
				Beamformee STS <= 80Mhz: 3
				Beamformee STS > 80Mhz: 3
				Sounding Dimensions <= 80Mhz: 2
				Sounding Dimensions > 80Mhz: 2
				Codebook Size SU Feedback
				Codebook Size MU Feedback
				Triggered SU Beamforming Feedback
				Triggered MU Beamforming Feedback
				Partial Bandwidth Extended Range
				PPE Threshold Present
				Max NC: 2
				STBC Tx > 80MHz
				STBC Rx > 80MHz
				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
			HE RX MCS and NSS set 160 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 160 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 
		HE Iftypes: mesh point
			HE MAC Capabilities (0x00011a000040):
				+HTC HE Supported
				OM Control
				Maximum A-MPDU Length Exponent: 3
				A-MSDU in A-MPDU
			HE PHY Capabilities: (0x0c200c0000000000008000):
				HE40/HE80/5GHz
				HE160/5GHz
				LDPC Coding in Payload
				STBC Tx <= 80MHz
				STBC Rx <= 80MHz
			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
			HE RX MCS and NSS set 160 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 160 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
		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:
			* 5180.0 MHz [36] (17.0 dBm)
			* 5200.0 MHz [40] (17.0 dBm)
			* 5220.0 MHz [44] (17.0 dBm)
			* 5240.0 MHz [48] (17.0 dBm)
			* 5260.0 MHz [52] (24.0 dBm) (radar detection)
			* 5280.0 MHz [56] (24.0 dBm) (radar detection)
			* 5300.0 MHz [60] (24.0 dBm) (radar detection)
			* 5320.0 MHz [64] (24.0 dBm) (radar detection)
			* 5360.0 MHz [72] (disabled)
			* 5380.0 MHz [76] (disabled)
			* 5400.0 MHz [80] (disabled)
			* 5420.0 MHz [84] (disabled)
			* 5440.0 MHz [88] (disabled)
			* 5460.0 MHz [92] (disabled)
			* 5500.0 MHz [100] (24.0 dBm) (radar detection)
			* 5520.0 MHz [104] (24.0 dBm) (radar detection)
			* 5540.0 MHz [108] (24.0 dBm) (radar detection)
			* 5560.0 MHz [112] (24.0 dBm) (radar detection)
			* 5580.0 MHz [116] (24.0 dBm) (radar detection)
			* 5600.0 MHz [120] (24.0 dBm) (radar detection)
			* 5620.0 MHz [124] (24.0 dBm) (radar detection)
			* 5640.0 MHz [128] (24.0 dBm) (radar detection)
			* 5660.0 MHz [132] (24.0 dBm) (radar detection)
			* 5680.0 MHz [136] (24.0 dBm) (radar detection)
			* 5700.0 MHz [140] (24.0 dBm) (radar detection)
			* 5720.0 MHz [144] (24.0 dBm) (radar detection)
			* 5745.0 MHz [149] (25.0 dBm)
			* 5765.0 MHz [153] (25.0 dBm)
			* 5785.0 MHz [157] (25.0 dBm)
			* 5805.0 MHz [161] (25.0 dBm)
			* 5825.0 MHz [165] (25.0 dBm)
			* 5845.0 MHz [169] (disabled)
			* 5865.0 MHz [173] (disabled)
			* 5885.0 MHz [177] (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
		 * probe_client
		 * set_noack_map
		 * register_beacons
		 * start_p2p_device
		 * set_mcast_rate
		 * testmode
		 * connect
		 * disconnect
		 * channel_switch
		 * set_qos_map
		 * set_multicast_to_unicast
		 * set_sar_specs
	software interface modes (can always be added):
		 * AP/VLAN
		 * monitor
	valid interface combinations:
		 * #{ IBSS } <= 1, #{ AP, mesh point } <= 16, #{ managed } <= 19,
		   total <= 19, #channels <= 1, STA/AP BI must match, radar detect widths: { 20 MHz (no HT), 20 MHz, 40 MHz, 80 MHz, 160 MHz }

	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 low priority scan.
	Device supports scan flush.
	Device supports AP scan.
	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.
	max # scan plans: 1
	max scan plan interval: -1
	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:
		* [ VHT_IBSS ]: VHT-IBSS
		* [ RRM ]: RRM
		* [ 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
		* [ SCAN_RANDOM_SN ]: use random sequence numbers in scans
		* [ SCAN_MIN_PREQ_CONTENT ]: use probe request with only rate IEs in scans
		* [ CAN_REPLACE_PTK0 ]: can safely replace PTK 0 when rekeying
		* [ AIRTIME_FAIRNESS ]: airtime fairness scheduling
		* [ STA_TX_PWR ]: TX power control per station
		* [ AQL ]: Airtime Queue Limits (AQL)
		* [ CONTROL_PORT_NO_PREAUTH ]: disable pre-auth over nl80211 control port support
		* [ DEL_IBSS_STA ]: deletion of IBSS station support
		* [ SCAN_FREQ_KHZ ]: scan on kHz frequency support
		* [ CONTROL_PORT_OVER_NL80211_TX_STATUS ]: tx status for nl80211 control port support
		* [ FILS_DISCOVERY ]: FILS discovery frame transmission support
		* [ UNSOL_BCAST_PROBE_RESP ]: unsolicated broadcast probe response transmission support
		* [ BEACON_RATE_HE ]: HE beacon rate support (AP/mesh)
		* [ BSS_COLOR ]: BSS coloring support
		* [ POWERED_ADDR_CHANGE ]: can change MAC address while up

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the mt7915e module and compare the current firmware behavior against the proprietary firmware using the supplied iperf3 upload and reverse-download commands. Check the iw phy1 info output and the cfg80211/mac80211 context; done means reproducing the issue no longer shows download speed near half of upload speed.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
networking, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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