Strange things (lost connection on upload/download big files) with TP-Link Archer T4U Plus

[dipol0]

Hi. Sorri for my english ))

I have TP-Link Archer T4U Plus. Use you driver as most stable then iam think, but... . I have SAMBA shares, FTP... And linux and Win clients. When i try upload/download big file (~100Mb and more....) over SMB/FTP connecton...hmm... wifi on Archer T4U freezed/sleep... after few time connection restored (i see webmin panel on machine with TL-Link T4U) but file transmission lost. Same speedtest_cli sometimes fails... (https://www.speedtest.net/apps/cli)

HW:

1. Router - Microtik RB962UiGS-5HacT2HnT rev. r2 with RouterOS v7.8rc2
2. MAIN PC with connected TP-Link Archer T4U Plus - MoBo - ASUS PRIME A320I-K
3. OS: Ubuntu 22.04. Kernel 5.15.94 with UKSM patch - https://github.com/dolohow/uksm/tree/master/v5.x
4. lsusb out: Bus 002 Device 003: ID 2357:0115 TP-Link Archer T4U ver.3
5. I can connect TL-Link Archer T4U to 5GHz wifi on Mikrotik router load 88x2bu module with optins: options 88x2bu rtw_drv_log_level=5 rtw_led_ctrl=1 rtw_switch_usb_mode=1 rtw_power_mgnt=0 rtw_wireless_mode=84 rtw_vht_enable=1 rtw_beaform_cap=11 rtw_qos_opt_enable=1 rtw_channel=48
6. Internal mobo wire NIC i dont use and dont start it from /etc/network/interfaces (i disable netplan) - T4U a single connected over USB3 port on mobo.
7. Use wpa_supplicant (v.2.10)

in dmesg out i see many entries:

---

[45136.801978] RTW: [HALMAC][TRACE]chksum disable [45136.801980] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.801981] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.805291] RTW: [HALMAC][TRACE]chksum disable [45136.805295] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.805297] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.805391] RTW: [HALMAC][TRACE]chksum disable [45136.805393] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.805394] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.805446] RTW: [HALMAC][TRACE]chksum disable [45136.805448] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.805449] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <===

---

sometimes:

---

[45136.167969] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.167998] RTW: [HALMAC][TRACE]chksum disable [45136.168001] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.168004] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.186610] RTW: unknown vendor specific information element ignored (vendor OUI 00:0c:42 len=42) [45136.186618] RTW: Unknown Broadcom information element ignored (type=52 len=26) [45136.188980] RTW: xmit_status_check REG_TXDMA_STATUS:0x00000401 [45136.190464] RTW: [HALMAC][TRACE]cfg_usb_rx_agg_88xx ===> [45136.196971] RTW: [HALMAC][TRACE]cfg_usb_rx_agg_88xx <=== [45136.200180] RTW: rtl8822b_fillh2ccmd(wlx3460f95c4249): id=0x42 buf= 0x00 0x00 0x34 0x00 0x00 0x00 0x04 [45136.264330] RTW: [HALMAC][TRACE]chksum disable [45136.264345] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.264349] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.279802] RTW: unknown vendor specific information element ignored (vendor OUI 00:0c:42 len=42) [45136.279811] RTW: Unknown Broadcom information element ignored (type=52 len=26) [45136.392428] RTW: unknown vendor specific information element ignored (vendor OUI 00:0c:42 len=42) [45136.392457] RTW: Unknown Broadcom information element ignored (type=52 len=26) [45136.484378] RTW: unknown vendor specific information element ignored (vendor OUI 00:0c:42 len=42) [45136.484402] RTW: Unknown Broadcom information element ignored (type=52 len=26) [45136.597204] RTW: unknown vendor specific information element ignored (vendor OUI 00:0c:42 len=42) [45136.597229] RTW: Unknown Broadcom information element ignored (type=52 len=26) [45136.689163] RTW: unknown vendor specific information element ignored (vendor OUI 00:0c:42 len=42) [45136.689171] RTW: Unknown Broadcom information element ignored (type=52 len=26) [45136.738080] RTW: [HALMAC][TRACE]chksum disable [45136.738087] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===> [45136.738090] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx <=== [45136.738112] RTW: [HALMAC][TRACE]chksum disable [45136.738116] RTW: [HALMAC][TRACE]get_usb_bulkout_id_88xx ===>

---

Sometimes after fail connection not restore automatically and i run: systemctl restart networking for restore wifi connection or little more hard solution with reload 88x2bu module

FILE - syslog.zip

If you need wpa_supplicant log and mikrotik log - wrtie me - i send it for you.

This iisue happens on Linux and Win clients (i try use connect SMB share as network drive or use FTP client - Filezilla...).

May be you can see problem and find solution. Thnx.

[RinCat]

Hi, I don't see any error here. But can you try to disable wifi background scan?

RTW: cfg80211_rtw_scan (wlx3460f95c4249) : scan deny

https://wiki.archlinux.org/title/NetworkManager#Regular_network_disconnects,latency_and_lost_packets(WiFi)

[dipol0]

@RinCat I not profi but i dont use GUI on this machine. And my 5GHz network is hidden. I fix BSSID in wpa_supplicant.conf

---

ctrl_interface_group=0 ctrl_interface=/var/run/wpa_supplicant update_config=1 ap_scan=1 country=<my_counrty> network={ ssid="MYNET-5G" bssid=<mac_5ghz_on_router> scan_ssid=1 key_mgmt=WPA-PSK pairwise=CCMP proto=RSN group=CCMP psk=<my_psk> }

---

Or may be i need do something else?

[RinCat]

You can wait and see if it happened again.

[dipol0]

You can wait and see if it happened again.

Yes. It repeat every time when i try upload/download big file to/from machime with Archer T4U over SMB/FTP... to/from Linux/Win clients. I try use enother driver (https://github.com/morrownr/88x2bu-20210702) but have same issue, but you driver look more stable.

May be logs my router and wpa_supplicant tell more for you?

[RinCat]

Maybe you can try move the Archer T4U to a different USB port? It can also be caused by insufficient power supply.

[dipol0]

Maybe you can try move the Archer T4U to a different USB port? It can also be caused by insufficient power supply.

))) Iam read about this in another issue but not can try it now. I onnect Archer to front USB but without another connected dev like as mouse/keyboard etc...

I try play connect Archer to back side ports tomorrow and write about result.

Thnx.

[dipol0]

Maybe you can try move the Archer T4U to a different USB port? It can also be caused by insufficient power supply.

Hi. I connect Archer to mobo backside USB port but not have positive effect. For exampe i move/copy from my local PC to remote (with Archer) file have 3.5Gb size, uploading stop and fail ~40% and Archer lost connection with router and try reconnect.

I check /sys/class/net/wlx3460f95c4249/statistics and found after try big file move have dropped pakets in

/sys/class/net/wlx3460f95c4249/statistic/rx_dropped - ~80+ value and /sys/class/net/wlx3460f95c4249/statistic/tx_dropped - ~2..4 value

parameters with "error" - clear = 0

You driver have option for try change tx/rx buffer size, tso.... ? ethtool cant change this parameters ((

I try use driver from another maintainer (https://github.com/fastoe/RTL8812BU , v5.13.1 ) but have same result.

This fail happen on hi-load usb archer - moving/copying big files or view video content from PC with Archer on enother device. If load not very high - all work fine. I can normal see Webmin pades on PC with archer... work with files with small size....

[nikallian]

No offense to the guys here, they do great work maintaining the driver which I used when I bought my T4U but in the process I found several issues especially with hostapd so I tested a bunch of other drivers and finally I found one which in my case appeared to have almost no issues. You can give it a try.

https://github.com/ivanovborislav/rtl88x2bu

[dipol0]

@nikallian tnkx

I try few drivers:

1. https://github.com/RinCat/RTL88x2BU-Linux-Driver
2. https://github.com/ivanovborislav/rtl88x2bu
3. https://github.com/morrownr/88x2bu-20210702

Use - wpa_supplicant.

But all this drivers with default settings disconnect me from PC with Archer T4U if i try upload/download big size files ( from 500...800mb and more).

Experimental i found and get more stability if use module option rtw_pwrtrim_enable=1 with RinCat driver. I dont know what is it, but it work for me. At now i can upload/download files with size 10Gb (more i dont try).

• )) i found:

1. In RinCat driver option rtw_led_ctrl=0 - dont turn LED off on my Archer.
2. If i set wireless 5GHz on my Mikrotik router in 5GH-only-AC and set driver option rtw_wireless_mode=64 and try connect - not have connection and register station on router (all thre driver - RinCat, ivanovborislav, morrown). If use rtw_wireless_mode=84 and set in router 5GHz-A/N/AC - all work.

At now i set in router 5GHz-A/N/AC, Freq=5240, Frequency Mode = superchannel. Start RinCat module with options:

options 88x2bu rtw_drv_log_level=1 rtw_led_ctrl=1 rtw_switch_usb_mode=1 rtw_power_mgnt=0 rtw_wireless_mode=84 rtw_dfs_region_domain=0 rtw_country_code=MY rtw_vht_enable=1 rtw_ht_enable=1 rtw_beaform_cap=11 rtw_qos_opt_enable=1 rtw_channel=48 rtw_pwrtrim_enable=1 rtw_ampdu_enable=1 rtw_ch_switch_offload=1 rtw_gro_en=1

Test (IP 192.168.0.50 - PC with TP-Link Archer T4U Plus / AC1300):

---

root@pc:/var/log# iperf3 -c 192.168.0.50 -4 Connecting to host 192.168.0.50, port 5201 [ 5] local 192.168.0.2 port 55236 connected to 192.168.0.50 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 112 MBytes 943 Mbits/sec 755 283 KBytes
[ 5] 1.00-2.00 sec 110 MBytes 921 Mbits/sec 856 269 KBytes
[ 5] 2.00-3.00 sec 107 MBytes 900 Mbits/sec 908 260 KBytes
[ 5] 3.00-4.00 sec 111 MBytes 927 Mbits/sec 747 255 KBytes
[ 5] 4.00-5.00 sec 110 MBytes 921 Mbits/sec 916 252 KBytes
[ 5] 5.00-6.00 sec 109 MBytes 912 Mbits/sec 1314 256 KBytes
[ 5] 6.00-7.00 sec 110 MBytes 923 Mbits/sec 1105 262 KBytes
[ 5] 7.00-8.00 sec 108 MBytes 902 Mbits/sec 1408 283 KBytes
[ 5] 8.00-9.00 sec 109 MBytes 912 Mbits/sec 1251 266 KBytes
[ 5] 9.00-10.00 sec 105 MBytes 881 Mbits/sec 1908 5.66 KBytes

[ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 1.06 GBytes 914 Mbits/sec 11168 sender [ 5] 0.00-10.04 sec 1.06 GBytes 908 Mbits/sec receiver

iperf Done. root@pc:/var/log# iperf3 -c 192.168.0.50 -4 -R Connecting to host 192.168.0.50, port 5201 Reverse mode, remote host 192.168.0.50 is sending [ 5] local 192.168.0.2 port 42636 connected to 192.168.0.50 port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 106 MBytes 889 Mbits/sec
[ 5] 1.00-2.00 sec 107 MBytes 901 Mbits/sec
[ 5] 2.00-3.00 sec 106 MBytes 885 Mbits/sec
[ 5] 3.00-4.00 sec 105 MBytes 881 Mbits/sec
[ 5] 4.00-5.00 sec 106 MBytes 885 Mbits/sec
[ 5] 5.00-6.00 sec 106 MBytes 893 Mbits/sec
[ 5] 6.00-7.00 sec 108 MBytes 904 Mbits/sec
[ 5] 7.00-8.00 sec 106 MBytes 891 Mbits/sec
[ 5] 8.00-9.00 sec 108 MBytes 904 Mbits/sec
[ 5] 9.00-10.00 sec 104 MBytes 870 Mbits/sec

[ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.04 sec 1.04 GBytes 889 Mbits/sec 597 sender [ 5] 0.00-10.00 sec 1.04 GBytes 890 Mbits/sec receiver

iperf Done.

---

Worked!!!

I see too many retries. I play with tcp_congestion_control but not. May be it normal situation for WiFI - noises...etc.

I think we can close this issue but may be RinCat be improve driver quality, and stability :+1:

[dipol0]

Nope. It happens again... ((

[dipol0]

I try kernel 5.17.9 - no good result.

Uploading stop on big size file upload to PC with Archer T4U Plus (sometimes and download from too). I try FTP/SAMBA Low upload speed max 40MB/s

rtw.log mikrotik-main.log

Check MAC Archer T4U - 34:60:F9:5C:42:49 Router Mikrotik 5GHz wireless MAC - 08:55:31:CF:7C:B7

@RinCat, may be log give more for you. Thnx.

[Apisteftos]

I have problem with downloading large files, 6,3GB to be exactly. I am downloading the image-net validation file, which is 6.3GB. In the middle of the downloading process, approximately 3GB downloading stops working and I am connected but I don't have any internet access.

But it is very strange, because, I have downloaded other larger files but until now I didn't have any problem.