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R6260 MT7621 slow WiFi speed/coverage #12166

Open netstickbat opened 1 year ago

netstickbat commented 1 year ago

Describe the bug

I think last release with decent speed/coverage was probably 21.x. Been running snapshots ever since but the issue still persists. As soon as I move further away (~3m) from the router coverage and thus speed drops significantly whereas this used to be just fine before. Quick search shows this post on the forum related with low TX power.

OpenWrt version

r22257-166ab6f90e

OpenWrt target/subtarget

ramips/mt7621

Device

Netgear R6260

Image kind

Official downloaded image

Steps to reproduce

No response

Actual behaviour

No response

Expected behaviour

No response

Additional info

No response

Diffconfig

No response

Terms

brada4 commented 1 year ago

What does iwinfo say for programmed tx power? (you can post it maksing/editing away MAC and SSID)

netstickbat commented 1 year ago

Here it is. Let me know if you need more details.

phy0-ap0  ESSID: "x"
          Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 1 (2.412 GHz)  HT Mode: HT20
          Center Channel 1: 1 2: unknown
          Tx-Power: 20 dBm  Link Quality: 22/70
          Signal: -88 dBm  Noise: unknown
          Bit Rate: 13.7 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11b/g/n
          Hardware: 14C3:7603 14C3:7603 [MediaTek MT7603E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

phy1-ap0  ESSID: "y"
          Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 100 (5.500 GHz)  HT Mode: VHT160
          Center Channel 1: 114 2: unknown
          Tx-Power: 6 dBm  Link Quality: 35/70
          Signal: -75 dBm  Noise: -90 dBm
          Bit Rate: 30.0 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/n
          Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy1

phy1-ap1  ESSID: "z"
          Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 100 (5.500 GHz)  HT Mode: VHT160
          Center Channel 1: 114 2: unknown
          Tx-Power: 6 dBm  Link Quality: 34/70
          Signal: -76 dBm  Noise: -90 dBm
          Bit Rate: 216.0 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/n
          Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy1
tapper82 commented 1 year ago

This is what I get from my r7800.

wlan0 ESSID: "tapper's net"
Signal: -73 dBm Noise: -108 dBm
Bit Rate: 490.0 MBit/s
Encryption: WPA2 PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11ac/n
Hardware: 168C:0046 168C:CAFE [Qualcomm Atheros QCA9984]
TX power offset: none
Frequency offset: none
Supports VAPs: yes PHY name: phy0
wlan1 ESSID: "tapper's net"
Access Point: 78:D2:94:A2:14:9B
Mode: Master Channel: 1 (2.412 GHz) HT Mode: HT20
Center Channel 1: 1 2: unknown
Tx-Power: 20 dBm Link Quality: 36/70
Signal: -74 dBm Noise: -102 dBm
Bit Rate: 72.9 MBit/s
Encryption: WPA2 PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11b/g/n
Hardware: 168C:0046 168C:CAFE [Qualcomm Atheros QCA9984]
TX power offset: none
Frequency offset: none
Supports VAPs: yes PHY name: phy1
root@TappersAP:~#

This is from my r6260

phy0-ap0 ESSID: "tapper's net"
Access Point: 38:aa:bb:cc:EA:D3
Mode: Master Channel: 11 (2.462 GHz) HT Mode: HT40
Center Channel 1: 9 2: unknown
Tx-Power: 20 dBm Link Quality: 40/70
Signal: -70 dBm Noise: unknown
Bit Rate: 86.7 MBit/s
Encryption: WPA2 PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11b/g/n
Hardware: 14C3:7603 14C3:7603 [MediaTek MT7603E]
TX power offset: none
Frequency offset: none
Supports VAPs: yes PHY name: phy0
phy1-ap0 ESSID: "tapper's net"
Access Point: 38:aa:bb:cc:dd:ee
Mode: Master Channel: 100 (5.500 GHz) HT Mode: VHT80
Center Channel 1: 106 2: unknown
Tx-Power: 20 dBm Link Quality: 51/70
Signal: -59 dBm Noise: -89 dBm
Bit Rate: 530.8 MBit/s
Encryption: WPA2 PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11ac/n
Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
TX power offset: none
Frequency offset: none
Supports VAPs: yes PHY name: phy1
root@TappersAP:~#
R7800 is on stable and r6260 is on master.

tapper82 commented 1 year ago

@netstickbat Are you talking about the 2.4 or the 5 gig radio?

brada4 commented 1 year ago 
       Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 100 (5.500 GHz)  HT Mode: VHT160
          Tx-Power: 6 dBm  Link Quality: 35/70

Please set region in web UI, the setting is separate per radio, confirm with iw reg get

You can adjust channel auto-selection to prefer more powerful channels by setting minimal power in 5GHz band in /wtc/config/wireless like

config wifi-device 'radio0'
...
        option band '5g'
...
        # real country code
        option country 'XX'
        # automatic selection
        option channel 'auto'
        # prefer realistically strong channels, selects strongest if too high
        option min_tx_power '19'

followed by service wpad restart

netstickbat commented 1 year ago

@netstickbat Are you talking about the 2.4 or the 5 gig radio?

@tapper82 Both. Although 2.4 is definitely slower than before.

Please set region in web UI, the setting is separate per radio, confirm with iw reg get

@brada4 This was already set. Here's the output of that command:

# iw reg get
global
country GB: DFS-ETSI
        (2400 - 2483 @ 40), (N/A, 20), (N/A)
        (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
        (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
        (5470 - 5730 @ 160), (N/A, 26), (0 ms), DFS
        (5725 - 5850 @ 80), (N/A, 23), (N/A), NO-OUTDOOR
        (5925 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR
        (57000 - 71000 @ 2160), (N/A, 40), (N/A)

You can adjust channel auto-selection to prefer more powerful channels by setting minimal power in 5GHz band in /wtc/config/wireless like

[snip]

followed by service wpad restart

Done. Although things are the same coverage/speed wise after a service wpad restart. Noticed that even though 2.4 is set to HT40, iwinfo shows HT20. Here's the output for the current configuration:

# iwinfo
phy0-ap0  ESSID: "x"
          Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 3 (2.422 GHz)  HT Mode: HT20
          Center Channel 1: 3 2: unknown
          Tx-Power: 20 dBm  Link Quality: 23/70
          Signal: -87 dBm  Noise: unknown
          Bit Rate: 13.8 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11b/g/n
          Hardware: 14C3:7603 14C3:7603 [MediaTek MT7603E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

phy1-ap0  ESSID: "y"
          Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 100 (5.500 GHz)  HT Mode: VHT160
          Center Channel 1: 114 2: unknown
          Tx-Power: 6 dBm  Link Quality: 36/70
          Signal: -74 dBm  Noise: -90 dBm
          Bit Rate: 30.0 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/n
          Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy1

phy1-ap1  ESSID: "z"
          Access Point: AB:CD:EF:01:23:45
          Mode: Master  Channel: 100 (5.500 GHz)  HT Mode: VHT160
          Center Channel 1: 114 2: unknown
          Tx-Power: 6 dBm  Link Quality: 36/70
          Signal: -74 dBm  Noise: -90 dBm
          Bit Rate: 58.5 MBit/s
          Encryption: WPA2 PSK (CCMP)
          Type: nl80211  HW Mode(s): 802.11ac/n
          Hardware: 14C3:7615 7615:14C3 [MediaTek MT7615E]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy1

# grep -Ev "key|ssid|network" /etc/config/wireless

config wifi-device 'radio0'
        option type 'mac80211'
        option path '1e140000.pcie/pci0000:00/0000:00:01.0/0000:02:00.0'
        option band '2g'
        option htmode 'HT40'
        option channel 'auto'
        option cell_density '0'
        option country 'GB'
        option min_tx_power '19'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option mode 'ap'
        option encryption 'psk2'

config wifi-device 'radio1'
        option type 'mac80211'
        option path '1e140000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0'
        option band '5g'
        option htmode 'VHT160'
        option channel 'auto'
        option country 'GB'
        option cell_density '0'
        option min_tx_power '19'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option mode 'ap'
        option isolate '1'
        option encryption 'psk2'

config wifi-iface 'wifinet2'
        option device 'radio1'
        option mode 'ap'
        option encryption 'psk2'
        option isolate '1'

Thanks both!

brada4 commented 1 year ago

Seems 5ghz calibration data is wrong indeed. Ch 100 is DFS as per reg domain, so it should be 26dBm or Off . Maybe try VHT80, it has some non-DFS options to choose from?

Regarding 20-40MHz in 2.4GHz band - there is advanced option to force 40MHz in busy area, but normally that does not add transfer speeds, just interferes more with your neighbours.

Also highly recommended to set 2.4 and 5 GHz SSID names equal so that exiting coverage of one other is automatically picked up (no roaming support needed in common case)

netstickbat commented 1 year ago

Seems 5ghz calibration data is wrong indeed. Ch 100 is DFS as per reg domain, so it should be 26dBm or Off . Maybe try VHT80, it has some non-DFS options to choose from?

Looks the same with VHT80. Would that be the calibration as mentioned on the forum post that I have linked on my original post above? How do I go about finding the right address for the .dtsi files? Would this apply to the 2.4GHz radio as well since I am having issues with that one too?

As far as I understood by the forum post this should be dynamically picked up but a patch had to be reverted due to some issues. Do you happen to know if there are any plans on getting that sorted on OpenWRT?

Regarding 20-40MHz in 2.4GHz band - there is advanced option to force 40MHz in busy area, but normally that does not add transfer speeds, just interferes more with your neighbours.

I'll try that.

Also highly recommended to set 2.4 and 5 GHz SSID names equal so that exiting coverage of one other is automatically picked up (no roaming support needed in common case)

Will do. Thanks for your help!

brada4 commented 1 year ago

Will help to link here: https://github.com/openwrt/mt76/issues They know better how calibration data of ROM should look like.

DragonBluep commented 1 year ago

R6260 does not support 160 MHz BW.