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62626368616e
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PostPosted: Fri Aug 14, 2020 9:24 pm    Post subject: iwlwifi throttling? Reply with quote

I have a wifi 6 capable laptop, using Intel AX200:
Code:
52:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a)


Modules loaded, kernel config seems OK, wifi works. But, it seems like my connection is being throttled-- I have gigabit internet and a Wifi 6 capable router (FIOS), however, my speedtest results are quite lackluster compared to what I expected:
Code:
sleepy@seraph /etc/NetworkManager/system-connections $ speedtest-cli
Retrieving speedtest.net configuration...
Testing from Verizon Fios ([redacted])...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by CenturyLink (Clinton, NJ) [77.26 km]: 12.296 ms
Testing download speed................................................................................
Download: 269.18 Mbit/s
Testing upload speed......................................................................................................
Upload: 3.24 Mbit/s


Checking out dmesg, I see these alerts:
Code:
sleepy@seraph /etc/NetworkManager/system-connections $ dmesg | grep 04:a2:22:b5:85:20
[   32.163661] wlp82s0: authenticate with 04:a2:22:b5:85:20
[   32.173950] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[   32.204781] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[   32.206796] wlp82s0: RX AssocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=4)
[   32.272598] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20
[ 3999.306037] wlp82s0: disconnect from AP 04:a2:22:b5:85:20 for new auth to 04:a2:22:b5:85:1f
[ 4299.193779] wlp82s0: disconnect from AP 04:a2:22:b5:85:1f for new auth to 04:a2:22:b5:85:20
[ 4299.207105] wlp82s0: authenticate with 04:a2:22:b5:85:20
[ 4299.215082] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[ 4299.244345] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[ 4299.245975] wlp82s0: RX ReassocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=3)
[ 4299.269946] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20
[ 8216.369159] wlp82s0: disconnect from AP 04:a2:22:b5:85:20 for new auth to 04:a2:22:b5:85:1f
[ 8516.276304] wlp82s0: disconnect from AP 04:a2:22:b5:85:1f for new auth to 04:a2:22:b5:85:20
[ 8516.291797] wlp82s0: authenticate with 04:a2:22:b5:85:20
[ 8516.303389] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[ 8516.333271] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[ 8516.335164] wlp82s0: RX ReassocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=2)
[ 8516.404905] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20
[10131.449166] wlp82s0: deauthenticating from 04:a2:22:b5:85:20 by local choice (Reason: 3=DEAUTH_LEAVING)
[10162.603363] wlp82s0: disconnect from AP 04:a2:22:b5:85:1f for new auth to 04:a2:22:b5:85:20
[10162.617131] wlp82s0: authenticate with 04:a2:22:b5:85:20
[10162.624510] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[10162.654871] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[10162.656463] wlp82s0: RX ReassocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=2)
[10162.682257] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20
[10763.934838] wlp82s0: disconnect from AP 04:a2:22:b5:85:20 for new auth to 04:a2:22:b5:85:1f
[11066.268836] wlp82s0: disconnect from AP 04:a2:22:b5:85:1f for new auth to 04:a2:22:b5:85:20
[11066.282977] wlp82s0: authenticate with 04:a2:22:b5:85:20
[11066.291478] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[11066.321258] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[11066.322903] wlp82s0: RX ReassocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=3)
[11066.382906] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20
[11435.195082] wlp82s0: disconnect from AP 04:a2:22:b5:85:20 for new auth to 04:a2:22:b5:85:1f
[11744.579289] wlp82s0: disconnect from AP 04:a2:22:b5:85:1f for new auth to 04:a2:22:b5:85:20
[11744.594798] wlp82s0: authenticate with 04:a2:22:b5:85:20
[11744.604047] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[11744.633739] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[11744.635352] wlp82s0: RX ReassocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=2)
[11744.707617] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20
[16630.210516] wlp82s0: disconnect from AP 04:a2:22:b5:85:20 for new auth to 04:a2:22:b5:85:1f
[16939.855241] wlp82s0: disconnect from AP 04:a2:22:b5:85:1f for new auth to 04:a2:22:b5:85:20
[16939.877678] wlp82s0: authenticate with 04:a2:22:b5:85:20
[16939.889356] wlp82s0: send auth to 04:a2:22:b5:85:20 (try 1/3)
[16939.918742] wlp82s0: associate with 04:a2:22:b5:85:20 (try 1/3)
[16939.920728] wlp82s0: RX ReassocResp from 04:a2:22:b5:85:20 (capab=0x1011 status=0 aid=1)
[16939.973765] wlp82s0: Limiting TX power to 30 (30 - 0) dBm as advertised by 04:a2:22:b5:85:20


I looked up that MAC address and it's pretty sure it's my router. Someone told me that 30 dBm is FCC limit so my guess is that's probably why I'm getting this message? But how can I figure out what is throttling my connection/why? I'm no networking expert so please let me know if my assumptions are incorrect, or if there's any more information I can give. :)
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mike155
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PostPosted: Fri Aug 14, 2020 10:15 pm    Post subject: Reply with quote

Please connect you laptop to your router with an Ethernet cable. Repeat the 'speedtest-cli' test. Do you get better results?
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62626368616e
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PostPosted: Sat Aug 15, 2020 12:23 am    Post subject: Reply with quote

mike155 wrote:
Please connect you laptop to your router with an Ethernet cable. Repeat the 'speedtest-cli' test. Do you get better results?


Yes, significantly better:
Code:
Retrieving speedtest.net configuration...
Testing from Verizon Fios ()...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by KamaTera INC (New Jersey, NJ) [64.30 km]: 10.501 ms
Testing download speed................................................................................
Download: 563.53 Mbit/s
Testing upload speed......................................................................................................
Upload: 332.11 Mbit/s
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mike155
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PostPosted: Sat Aug 15, 2020 11:30 am    Post subject: Reply with quote

Quote:
Yes, significantly better

The difference is clearly visible! :-)

Let's try to find out what's wrong with your wireless LAN connection. First of all, switch back to wireless LAN and repeat the speed test. Is throughput still as bad as in your first post?
  1. Which init system do you use? OpenRC? Or Systemd?

  2. It seems that you use NetworkManager to configure your network connections, right?

  3. Please post the output of:
    Code:
    iwinfo
    OR
    Code:
    iw wlp82s0 link
    OR
    Code:
    iwconfig wlp82s0

    (Whatever works)

  4. Please post the output of
    Code:
    emerge --info

  5. How is your router/access point configured? Is the 5 GHz band enabled? Are high speed modes enabled?
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mike155
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PostPosted: Sat Aug 15, 2020 1:09 pm    Post subject: Reply with quote

It seems we have two threads about the same topic. See: https://forums.gentoo.org/viewtopic-p-8490858.html
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62626368616e
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PostPosted: Mon Aug 17, 2020 2:39 pm    Post subject: Reply with quote

mike155 wrote:
It seems we have two threads about the same topic. See: https://forums.gentoo.org/viewtopic-p-8490858.html


Ah, sorry for the delay on this. :) I see your replies on there, so I can just follow what was discussed in that thread if it is easier for you.

To answer, I use OpenRC, and I don't actually use NetworkManager; I was looking at a stackoverflow question that said to check the NetworkManager directory for unknown connections, not realizing it was an application, and just happened to have it already installed... lol. :)

Here is my emerge --info: https://dpaste.com/2YLT85Z8W

Here is
Code:
iw wlp82s0 link
-- I don't have the other options:
Code:
sleepy@seraph ~ $ iw wlp82s0 link
Connected to 04:a2:22:b5:85:20 (on wlp82s0)
   SSID: Diginet
   freq: 5660
   RX: 2380235 bytes (4213 packets)
   TX: 410392 bytes (3442 packets)
   signal: -50 dBm
   rx bitrate: 1200.9 MBit/s 80MHz HE-MCS 11 HE-NSS 2 HE-GI 0 HE-DCM 0
   tx bitrate: 1080.6 MBit/s 80MHz HE-MCS 10 HE-NSS 2 HE-GI 0 HE-DCM 0

   bss flags:   short-slot-time
   dtim period:   3
   beacon int:   100
[/code]
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mike155
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PostPosted: Tue Aug 18, 2020 2:20 am    Post subject: Reply with quote

Hmm.
Code:
   rx bitrate: 1200.9 MBit/s 80MHz HE-MCS 11 HE-NSS 2 HE-GI 0 HE-DCM 0
   tx bitrate: 1080.6 MBit/s 80MHz HE-MCS 10 HE-NSS 2 HE-GI 0 HE-DCM 0

That looks pretty good! :)

So why is the upload bit rate only 3.24 Mbit/s ?

Looks like: https://bbs.archlinux.org/viewtopic.php?id=249642.

I found another posts where a user reported problems with the AX200. He said that the problems went away after he upgraded to at least kernel 5.6.7.

Which kernel do you use? Does it help to upgrade to a more recent one?
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62626368616e
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PostPosted: Tue Aug 18, 2020 4:20 am    Post subject: Reply with quote

mike155 wrote:
Hmm.
Code:
   rx bitrate: 1200.9 MBit/s 80MHz HE-MCS 11 HE-NSS 2 HE-GI 0 HE-DCM 0
   tx bitrate: 1080.6 MBit/s 80MHz HE-MCS 10 HE-NSS 2 HE-GI 0 HE-DCM 0

That looks pretty good! :)

So why is the upload bit rate only 3.24 Mbit/s ?

Looks like: https://bbs.archlinux.org/viewtopic.php?id=249642.

I found another posts where a user reported problems with the AX200. He said that the problems went away after he upgraded to at least kernel 5.6.7.

Which kernel do you use? Does it help to upgrade to a more recent one?


Good to know that looks good! I was worried!

I'm using the latest mainline.

Actually, I'm wondering if it's a driver or BIOS issue; I don't have any power saving daemons, but I have power saving enabled in BIOS-- this is for the CPU though. I'm wondering if the driver itself is causing issues... I will try to see if I can enable a more verbose debug mode in the kernel and report back :)
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