5GHz WiFi band of AX200 is too slow

[imusorka]

There is an issue with the 5GHz WiFi band of the network card in my laptop. It's actually slower than 2.4GHz. This issue is not present in Windows.

Code: Select all

Network:
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: e000 
  bus ID: 04:00.0 
  IF: wlp4s0 state: up mac: <filter>

[SMG]

Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: e000

Because the iwlwifi driver changes with kernel versions, it is really best to provide us with more information about your hardware.

Please give us information about your install by entering this command in a terminal: inxi -Fxxxrz
Click </> from the mini toolbar above the textbox where you type your reply and then place your cursor between the code markers and paste the results of the command between the code markers [code]Results[/code]. This will let us know how Mint sees your hardware.

[imusorka]

See relevant details below.

Code: Select all

System:
  Kernel: 5.13.0-22-generic x86_64 bits: 64 compiler: N/A 
  Desktop: Cinnamon 5.0.7 wm: muffin 5.0.2 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal 
Network:
  Device-1: Realtek RTL8125 2.5GbE vendor: Tongfang Hongkong Limited 
  driver: r8169 v: kernel port: e000 bus ID: 02:00.0 chip ID: 10ec:8125 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: e000 
  bus ID: 04:00.0 chip ID: 8086:2723 
  IF: wlp4s0 state: up mac: <filter> 

[SMG]

See relevant details below.

If I thought those were the only relevant details, I would have only requested just that information. Please supply the requested inxi output which happens to be the exact same output described in Section 5 of READ: How To Get Help!.

[imusorka]

How is the remaining hardware relevant? If you are referring to repos, the output on them is below.

Code: Select all

Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
  1: deb [arch=amd64] https://dl.google.com/linux/chrome/deb/ stable main
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com uma main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  Active apt repos in: /etc/apt/sources.list.d/skype-stable.list 
  1: deb [arch=amd64] https://repo.skype.com/deb stable main
Info:
  Processes: 378 Uptime: 5h 36m Memory: 15.04 GiB used: 10.56 GiB (70.2%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: gnome-terminal inxi: 3.0.38 

[SMG]

How is the remaining hardware relevant?

You have provided no information at all as to what computer make and model you have. However, that is your choice not to do so. I would recommend you search about your laptop model to see if others with the same or similar model are also having an issue of this type.

As it is your choice not to provide the requested info, it is also my choice to spend time helping those who do provide the requested info. Good luck resolving your issue.

[imusorka]

My laptop is custom built and I wouldn't even be wasting anyone's time here if I'd found a solution online. There are no OEM Linux drivers to resolve this issue.

[SMG]

My laptop is custom built and I wouldn't even be wasting anyone's time here if I'd found a solution online.

I am aware PC Specialist and others make custom laptops using Tongfang as the manufacturer. Tuxedo also uses Tongfang. If you do a search on "Tongfang" or "Tong fang" on this forum you will come up with a lot of hits.

There are no OEM Linux drivers to resolve this issue.

Your wireless card is an Intel product. Intel makes the drivers which go into the kernel. You will get a version of the "OEM Linux driver" from the kernel. However, I do not know if the Tongfang may have done anything special related to the card which might be a factor in this situation.

[imusorka]

It's a Tongfang chassis indeed and looks like they messed up the compatibility in the process. I haven't found a solution anywhere online. My Intel drivers are current.

[cstamas]

Howdy, I myself had issues on my Tuxedo Infinity Book 14 Gen6 with same card, it simply after some (longer) time on WiFi disconnected, went nutz and so on (along with bluetooth). Hence, I simply killed n feature (this may be disappointing to you), but since then wifi works just fine for me:

Code: Select all

cstamas@Infinity:~$ cat /etc/modprobe.d/iwlwifi.conf 
# options iwlwifi 11n_disable=1 swcrypto=1
options iwlwifi 11n_disable=1

# /etc/modprobe.d/iwlwifi.conf
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system.  When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
cstamas@Infinity:~$ 

(note: first two lines are of interest, rest were present already in this file. Somewhere I read about swcrypto but it did not help me, so I used only 11n_disable=1)

[imusorka]

Howdy, I myself had issues on my Tuxedo Infinity Book 14 Gen6 with same card, it simply after some (longer) time on WiFi disconnected, went nutz and so on (along with bluetooth). Hence, I simply killed n feature (this may be disappointing to you), but since then wifi works just fine for me:

Setting it to 1 or 8 actually makes 5GHz slower (~15 Mbps) than it already was (~50 Mbps). Are you getting your full broadband speed? Mine is 1 Gbps, which works just fine in Windows. Am I missing another trick here?

[imusorka]

Issue persists even on the 5.14 kernel. Can anyone assist?

Code: Select all

System:
  Kernel: 5.14.0-1022-oem x86_64 bits: 64 compiler: N/A 
  Desktop: Cinnamon 5.2.7 wm: muffin 5.2.0 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.3 Una base: Ubuntu 20.04 focal
Network:
  Device-1: Realtek RTL8125 2.5GbE vendor: Tongfang Hongkong Limited 
  driver: r8169 v: kernel port: e000 bus ID: 02:00.0 chip ID: 10ec:8125 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: e000 
  bus ID: 04:00.0 chip ID: 8086:2723 
  IF: wlp4s0 state: down mac: <filter>

[Larry78723]

Do you have separate entries in network manager for 2.4 & 5 Ghz? If so, open Network Settings, click on the gear for the 5Ghz connection, set Band to A, not automatic, then select a channel other than default. You may have to repeat the channel selection until you find one that works best for you.

[imusorka]

It refuses to connect when I select any channel other than default. Interestingly, upload on default is 3x faster than download.

[imusorka]

I've lost ability to connect over wireless altogether. Relevant entries still appear under Network Connections. No Wireless section in
Network Settings though. I'm on the 5.14.0-1022-oem kernel.

Code: Select all

iwconfig
lo        no wireless extensions.
enp2s0    no wireless extensions.

Code: Select all

Network:
  Device-1: Realtek RTL8125 2.5GbE vendor: Tongfang Hongkong Limited 
  driver: r8169 v: kernel port: e000 bus ID: 02:00.0 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: [filtered] 
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: e000 
  bus ID: 04:00.0 

Code: Select all

lsmod | grep iwlwifi
iwlwifi               385024  1 iwlmvm
cfg80211              892928  3 iwlmvm,iwlwifi,mac80211

Code: Select all

dpkg -l | grep linux-modules-extra-$(uname -r); dmesg | grep iwl
[    5.085611] iwlwifi 0000:04:00.0: enabling device (0000 -> 0002)
[    5.088564] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-cc-a0-64.ucode failed with error -2
[    5.089915] iwlwifi 0000:04:00.0: api flags index 2 larger than supported by driver
[    5.089932] iwlwifi 0000:04:00.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 89.3.35.37
[    5.090193] iwlwifi 0000:04:00.0: loaded firmware version 63.c04f3485.0 cc-a0-63.ucode op_mode iwlmvm
[    5.114276] iwlwifi 0000:04:00.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340
[    5.331489] iwlwifi 0000:04:00.0: retry init count 0
[    5.331538] iwlwifi 0000:04:00.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340
[    5.540377] iwlwifi 0000:04:00.0: retry init count 1
[    5.540399] iwlwifi 0000:04:00.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340
[    5.751301] iwlwifi 0000:04:00.0: retry init count 2

Ethernet stops working after a while too. It does work much longer than on the regular kernels (~30 vs 5 minutes).

[imusorka]

WiFi is back after disabling fast boot in Windows. WiFi 6 still doesn't work correctly although upload is faster.

2.4GHz 100/170 Mbps
5GHz 83/460 Mbps

Code: Select all

wlp4s0    IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off