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#1 2022-07-22 14:27:53

joanmanel
Member
Registered: 2012-11-06
Posts: 189

Wifi usb dongle seems to cap speed at around 50 Mbps

Hi all,

I connect to the internet through a Wifi USB dongle. In particular, the one I use is a TP-link TL-WN823N V2.

This website (http://en.techinfodepot.shoutwiki.com/w … -WN823N_v2) says that its speed is up to 300 Mbps.

Previously I had DSL with speed of 50 Mbps download and 10 Mpbps upload. Today I got it upgraded to fibre with speeds of 300/100. Every other device in my house, when doing a speed test, shows those speeds, but this computer, which connects with that wifi dongle, shows 50 download / 60 upload. Initially I thought it'd be the dongle, but as said it is rated at 300. And from 300 to 50 there's a massive jump. The signal strength is "good". Doing a speed test using my phone from exactly the same spot, it shows 300/100.

lsusb -v shows the following information:

Bus 001 Device 011: ID 2357:0109 TP-Link TL-WN823N v2/v3 [Realtek RTL8192EU]
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x2357 TP-Link
  idProduct          0x0109 TL-WN823N v2/v3 [Realtek RTL8192EU]
  bcdDevice            2.00
  iManufacturer           1 Realtek 
  iProduct                2 802.11n NIC 
  iSerial                 3 00e04c000001
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0035
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           5
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              2 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x06  EP 6 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x87  EP 7 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               3
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x08  EP 8 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval 

"iw dev wlp0s20f0u13u2 link" returns the following:

Connected to c0:d7:aa:79:dd:cb (on wlp0s20f0u13u2)
	SSID: BT-TGCP67
	freq: 2412
	signal: -61 dBm
	tx bitrate: 144.4 MBit/s

In order to get it working I use aur/8192eu-dkms. Kernel is 5.18.12-arch1-1.

In case it matters, the motherboard is MSI Z590-A PRO, and the CPU is i5-11600K. The computer is around 1 year old.

I am happy to provide any other information needed.

Last edited by joanmanel (2022-07-22 15:13:00)

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#2 2022-07-22 16:40:24

seth
Member
Registered: 2012-09-03
Posts: 30,973

Re: Wifi usb dongle seems to cap speed at around 50 Mbps

tx bitrate: 144.4 MBit/s

50Mbps sounds like 802.11g (the NIC claims 802.11n support)  - please also provide a station dump https://wiki.archlinux.org/title/Networ … _interface
Also ideally information from the other wifi devices (the kind of conneciton they use)

You'll not get 300Mbps on a 20MHz wide band with an 802.11n chip.
Edit: I should have stressed that - 2412 is the center freqency of the 20MHz channel 1; the first 40MHz channel centers on 2422, so this is going to be at best a 20MHz/n connection what leaves you at a theoretic max of 288Mbps - if other devices get 300Mbps they *cannot* operate on that connection.

Last edited by seth (2022-07-22 16:48:26)

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#3 2022-07-24 09:02:12

joanmanel
Member
Registered: 2012-11-06
Posts: 189

Re: Wifi usb dongle seems to cap speed at around 50 Mbps

seth wrote:
tx bitrate: 144.4 MBit/s

50Mbps sounds like 802.11g (the NIC claims 802.11n support)  - please also provide a station dump https://wiki.archlinux.org/title/Networ … _interface
Also ideally information from the other wifi devices (the kind of conneciton they use)

You'll not get 300Mbps on a 20MHz wide band with an 802.11n chip.
Edit: I should have stressed that - 2412 is the center freqency of the 20MHz channel 1; the first 40MHz channel centers on 2422, so this is going to be at best a 20MHz/n connection what leaves you at a theoretic max of 288Mbps - if other devices get 300Mbps they *cannot* operate on that connection.

Thanks for your answer. Here are some of the outputs:

[root@housepc juanma]# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether d8:bb:c1:04:b6:87 brd ff:ff:ff:ff:ff:ff
3: wlp0s20f0u13u2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
    link/ether 50:3e:aa:26:ab:1a brd ff:ff:ff:ff:ff:ff
[root@housepc juanma]# iw dev wlp0s20f0u13u2 station dump
[root@housepc juanma]# iw phy
Wiphy phy0
	wiphy index: 0
	max # scan SSIDs: 9
	max scan IEs length: 2304 bytes
	max # sched scan SSIDs: 0
	max # match sets: 0
	Retry short limit: 7
	Retry long limit: 4
	Coverage class: 0 (up to 0m)
	Supported Ciphers:
		* WEP40 (00-0f-ac:1)
		* WEP104 (00-0f-ac:5)
		* TKIP (00-0f-ac:2)
		* CCMP-128 (00-0f-ac:4)
		* CMAC (00-0f-ac:6)
	Available Antennas: TX 0 RX 0
	Supported interface modes:
		 * IBSS
		 * managed
		 * AP
		 * monitor
		 * P2P-client
		 * P2P-GO
	Band 1:
		Capabilities: 0x1962
			HT20/HT40
			Static SM Power Save
			RX HT20 SGI
			RX HT40 SGI
			RX STBC 1-stream
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 16 usec (0x07)
		HT Max RX data rate: 300 Mbps
		HT TX/RX MCS rate indexes supported: 0-15
		Bitrates (non-HT):
			* 1.0 Mbps
			* 2.0 Mbps
			* 5.5 Mbps
			* 11.0 Mbps
			* 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)
	Supported commands:
		 * new_interface
		 * set_interface
		 * new_key
		 * start_ap
		 * new_station
		 * set_bss
		 * join_ibss
		 * set_pmksa
		 * del_pmksa
		 * flush_pmksa
		 * remain_on_channel
		 * frame
		 * set_channel
		 * connect
		 * disconnect
	WoWLAN support:
		 * wake up on anything (device continues operating normally)
	software interface modes (can always be added):
		 * monitor
	interface combinations are not supported
	Device supports SAE with AUTHENTICATE command
	Device supports scan flush.
	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
		 * 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
	Supported RX frame types:
		 * IBSS: 0xd0
		 * managed: 0x40 0xb0 0xd0
		 * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * P2P-client: 0x40 0xd0
		 * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
	Supported extended features:
[root@housepc juanma]# iw dev
phy#0
	Interface wlp0s20f0u13u2
		ifindex 3
		wdev 0x1
		addr 50:3e:aa:26:ab:1a
		ssid BT-TGCP67
		type managed
		txpower 12.00 dBm
[root@housepc juanma]# iw wlp0s20f0u13u2 station dump
[root@housepc juanma]# iw list
Wiphy phy0
	wiphy index: 0
	max # scan SSIDs: 9
	max scan IEs length: 2304 bytes
	max # sched scan SSIDs: 0
	max # match sets: 0
	Retry short limit: 7
	Retry long limit: 4
	Coverage class: 0 (up to 0m)
	Supported Ciphers:
		* WEP40 (00-0f-ac:1)
		* WEP104 (00-0f-ac:5)
		* TKIP (00-0f-ac:2)
		* CCMP-128 (00-0f-ac:4)
		* CMAC (00-0f-ac:6)
	Available Antennas: TX 0 RX 0
	Supported interface modes:
		 * IBSS
		 * managed
		 * AP
		 * monitor
		 * P2P-client
		 * P2P-GO
	Band 1:
		Capabilities: 0x1962
			HT20/HT40
			Static SM Power Save
			RX HT20 SGI
			RX HT40 SGI
			RX STBC 1-stream
			Max AMSDU length: 7935 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 16 usec (0x07)
		HT Max RX data rate: 300 Mbps
		HT TX/RX MCS rate indexes supported: 0-15
		Bitrates (non-HT):
			* 1.0 Mbps
			* 2.0 Mbps
			* 5.5 Mbps
			* 11.0 Mbps
			* 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)
	Supported commands:
		 * new_interface
		 * set_interface
		 * new_key
		 * start_ap
		 * new_station
		 * set_bss
		 * join_ibss
		 * set_pmksa
		 * del_pmksa
		 * flush_pmksa
		 * remain_on_channel
		 * frame
		 * set_channel
		 * connect
		 * disconnect
	WoWLAN support:
		 * wake up on anything (device continues operating normally)
	software interface modes (can always be added):
		 * monitor
	interface combinations are not supported
	Device supports SAE with AUTHENTICATE command
	Device supports scan flush.
	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
		 * 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
	Supported RX frame types:
		 * IBSS: 0xd0
		 * managed: 0x40 0xb0 0xd0
		 * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * P2P-client: 0x40 0xd0
		 * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
	Supported extended features:

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#4 2022-07-24 12:09:10

seth
Member
Registered: 2012-09-03
Posts: 30,973

Re: Wifi usb dongle seems to cap speed at around 50 Mbps

[root@housepc juanma]# iw wlp0s20f0u13u2 station dump

You're lacking a "dev"
Also

iw dev wlp0s20f0u13u2 info

and maybe a scan result (you can remove all but your own SSIDs and obfuscate SSID and MAC if you wish)

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