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iwlwifi weak signal for Intel AC 9462 on Linux

optimisme
Novice
2,117 Views

Wireless signal may be 90% on windows and 30% on Linux using the same machine and location.
This happens on different distributions such as Ubuntu and Fedora
It is unusable because of the disconnections and the speed.

Some information:

driver=iwlwifi driverversion=5.8.0-29-generic firmware=46.8902351f.0

...

[    4.468457] iwlwifi 0000:00:0c.0: Detected Intel(R) Wireless-AC 9462, REV=0x318
...
[    6.753774] iwlwifi 0000:00:0c.0: Conflict between TLV & NVM regarding enabling LAR (TLV = enabled NVM =disabled)

...

0 Kudos
20 Replies
Esteban_D_Intel
Moderator
2,031 Views

Hello optimisme,

Thank you for posting on the Intel® communities.  

This is an interesting behavior and I would like to further investigate this for you.


To better assist you please provide the following information:

  • For how long you’ve been experiencing this behavior?
  • How are you measuring the signal in Linux*?
  • Was the system working as expected before? If so, were any changes made?
  • Is this the original adapter that came with your computer or did you install it?


Please run the following tool and attach the reports generated.   

    

Intel® System Support Utility (Intel® SSU) for Linux* Download link.

  

1.Open the application and click on "Scan" to see the system and device information. 

2.By default, Intel® SSU will take you to the "Summary View".   

3.Click on the menu where it says "Summary" to change to "Detailed View".   

4.To save your scan, click on "Next", then "Save".   


Additionally please run the following commansd and share the output in a .txt file:

  •  modinfo iwlwifi​ 
  •  lsmod | grep iwlwifi​      
  • # dmesg | grep ASSERT (If the output is empty please follow the following article.)


Esteban D.

Intel Technical Support Technician  


optimisme
Novice
2,020 Views

-For how long you’ve been experiencing this behavior?

Since I bought the computer

-How are you measuring the signal in Linux*?

'Networkmanager' and and also 'nmcli dev wifi'

-Was the system working as expected before?

Never worked, this looks like a linux issue (driver or config)

-Is this the original adapter that came with your computer or did you install it?

Yes

-# dmesg | grep ASSERT (If the output is empty please follow the following article.)

I don't know what to do with this information, the out is empty. I added the 'trace.dat' file from that article.

Tell me if you need more information.

 

Esteban_D_Intel
Moderator
1,993 Views

Hello optimisme,

Thank you so much for your response and the information attached.

I wwould like to investigate this for you, however, I would appreciate if you could confirm the following:

  • We understand that the signal strength issue will occur only with Linux*. Are there any steps that we could follow to replicate this behavior?
  • If possible, please provide a picture/screenshots when the device is showing poor signal.
  • How many units are affected by this behavior?
  • Please provide more details about your troubleshooting steps performed so far.
  • What is your network environment? (Please provide details about router manufacturer,bands tested, etc)

Esteban D.

Intel Technical Support Technician


optimisme
Novice
1,979 Views

Hi,

Sorry for the delay.

This is the signal information from two different computers with different Intel NICs. Both computers are at the same location. Windows always has better connection, Linux on the (AC 9462) is not even usable.

Windows 10 (AC 9462) - Chuwi herobox

C:\Users\Albert>netsh wlan show interface

There is 1 interface on the system:

Name : Wi-Fi 2
Description : Intel(R) Wireless-AC 9462
GUID : 4b22b777-34c3-4365-8ccb-eae09d56663b
Physical address : XX:XX:XX:XX:XX:XX
State : connected
SSID : MOVISTAR_PLUS_C4BD
BSSID :XX:XX:XX:XX:XX:XX
Network type : Infrastructure
Radio type : 802.11ac
Authentication : WPA2-Personal
Cipher : CCMP
Connection mode : Auto Connect
Channel : 44
Receive rate (Mbps) : 14.4
Transmit rate (Mbps) : 150
Signal : 46%
Profile : MOVISTAR_PLUS_C4BD

Hosted network status : Not available

Ubuntu 20.10 (AC 9462) - Chuwi herobox

albert@albert-server:~$ iwconfig wlo2
wlo2 IEEE 802.11 ESSID:"MOVISTAR_PLUS_C4BD"
Mode:Managed Frequency:5.22 GHz Access Point: XX:XX:XX:XX:XX:XX
Bit Rate=97.6 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=24/70 Signal level=-86 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:1 Invalid misc:8 Missed beacon:0

albert@albert-server:~$ nmcli dev wifi
IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY
* 84:AA:9C:E2:C4:C6 MOVISTAR_PLUS_C4BD Infra 44 540 Mbit/s 32 ▂▄__ WPA2
94:6A:B0:C9:9E:FF -- Infra 100 540 Mbit/s 29 ▂___ WPA2
5A:6A:B0:C9:9E:FC MiFibra-9EFC Infra 100 540 Mbit/s 29 ▂___ WPA2
86:AA:9C:E2:C4:C6 MOVISTAR_C4BD Infra 44 540 Mbit/s 20 ▂___ WPA2
94:6A:B0:C9:9E:FE MiFibra-9EFC Infra 11 130 Mbit/s 14 ▂___ WPA2
84:AA:9C:E2:C4:BE MOVISTAR_C4BD Infra 11 130 Mbit/s 12 ▂___ WPA2

Windows 10 (AC 8265) - Xiaomi Lapbook Air 13

C:\Users\Albert>netsh wlan show interface

There is 1 interface on the system:

Name : Wi-Fi
Description : Intel(R) Dual Band Wireless-AC 8265
GUID : 4c7a728b-90f0-4daf-ba20-afc5ea9940c6
Physical address :XX:XX:XX:XX:XX:XX
State : connected
SSID : MOVISTAR_PLUS_C4BD
BSSID :XX:XX:XX:XX:XX:XX
Network type : Infrastructure
Radio type : 802.11ac
Authentication : WPA2-Personal
Cipher : CCMP
Connection mode : Auto Connect
Channel : 44
Receive rate (Mbps) : 585
Transmit rate (Mbps) : 585
Signal : 72%
Profile : MOVISTAR_PLUS_C4BD

Hosted network status : Not available

Ubuntu 20.10 (AC 8265) - Xiaomi Lapbook Air 13

wlp2s0 IEEE 802.11 ESSID:"MOVISTAR_PLUS_C4BD"
Mode:Managed Frequency:5.22 GHz Access Point: 84:AA:9C:E2:C4:C6
Bit Rate=650 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=45/70 Signal level=-65 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:23 Missed beacon:0

albert@albert-PC:~$ nmcli dev wifi
IN-USE SSID MODE CHAN RATE SIGNAL BARS SECURITY
MOVISTAR_C4BD Infra 11 130 Mbit/s 70 ▂▄▆_ WPA2
MiFibra-9EFC Infra 11 130 Mbit/s 70 ▂▄▆_ WPA2
MOVISTAR_C4BD Infra 44 540 Mbit/s 60 ▂▄▆_ WPA2
MiFibra-9EFC Infra 100 540 Mbit/s 54 ▂▄__ WPA2
* MOVISTAR_PLUS_C4BD Infra 44 540 Mbit/s 53 ▂▄__ WPA2

 

Fedora gave me similar results, this is when I began suspecting this is a problem of the Linux driver for Intel Wifi cards.

optimisme
Novice
1,977 Views

This a router from a Spanish telecom named 'Telefonica', the router itself is a MitraStar with:

Board ID: GPT-2541GNAC
Symmetric CPU Threads: 2
Build Timestamp: 200504_1308
Software Version: ES_g3.5_100VNJ0b54_7_CA
Bootloader (CFE) Version: 1.0.41-117.134
Wireless Driver Version: 6.37.14.4803.cpe4.14L04Apatch1.0
Voice Service Version:  
Uptime: 6D 18H 43M 14S
optimisme
Novice
1,976 Views

I attach the configuration of the router (I haven't changed it)

optimisme
Novice
1,974 Views
  • We understand that the signal strength issue will occur only with Linux*. Are there any steps that we could follow to replicate this behavior?

Yes, the problem occurs only with Linux. Tested on Ubuntu 20.04, Fedora 33 and Elementary OS 5.1

  • If possible, please provide a picture/screenshots when the device is showing poor signal.

See previous posts, tell me if you need something more

  • How many units are affected by this behavior?

At least my 2 units, I suspect every single unit using Intel Wireless

  • Please provide more details about your troubleshooting steps performed so far.

Just run Intel Wireless on Linux, it performs worst then windows. 

  • What is your network environment?

Home Network at home, and Eduroam at High School (where I work as a computer science teacher)

Also, I have tried the intructions from the next sites without success. Anyway it does not look like an isolated problem.

https://askubuntu.com/questions/660155/wifi-losing-connection-weak-signal-intel-7260-adapter

https://askubuntu.com/questions/1014198/how-to-make-intel-wi-fi-signal-stronger-in-ubuntu-gnome-16-0...

https://askubuntu.com/questions/1049307/slow-wifi-with-ubuntu-18-04-and-intel-dual-band-wireless-ac-...

https://askubuntu.com/questions/908026/weak-wifi-signal-with-ubuntu-16-04-on-dell-vostro-5468-intel-...

https://askubuntu.com/questions/1246721/wifi-signal-too-weak-intel-wireless-ac-9560-ubuntu-18-04

https://forums.linuxmint.com/viewtopic.php?t=305389

 

 

Esteban_D_Intel
Moderator
1,982 Views

 Hello optimisme,

Were you able to check the previous post?   

Please let me know if you need further assistance.   

Esteban D.  

Intel Technical Support Technician   

 


Esteban_D_Intel
Moderator
1,959 Views

 Hello optimisme,

Thank you so much for your response and the additional information provided.

Please allow me to further investigate this for you.

We will provide an update in the thread as soon as possible.


Esteban D.

Intel Technical Support Technician


thales
Beginner
1,890 Views

I have the same problem on a newly bought samsung laptop with AC-9462 REV=0x354. It only gets around 60% signal quality when standing literally next to the router, if I go to the next room it disconnects due to poor signal, while on Win10 I still get a decent signal with good speeds.

 

I already tried kernel versions 5.4 and 5.8, also tried all the workarounds provided in this topic and around the web to no avail.

Alberto_Sykes
Employee
1,858 Views

thales, Thank you for posting in the Intel® Communities Support.

 

Please submit your inquiry on a new thread, the reason for this is that every scenario is different even if the same product is being used, so for us to better assist you and in order to try to fix the problem, please submit a new thread:

https://communities.intel.com/community/tech

 

Let me apologize for any inconvenience.

 

Hello optimisme, I just received an update on this matter.

 

We need the specific outcomes received while entering every single command line. The attached information does not contain those results. Please share the screenshots including every single command line outcomes following the instructions below:

 

WiFi troubleshooting steps

 

Step 1: Check whether the kernel version supports this device:

The reference table of Wireless adapters and corresponding kernel versions is available in the following link:

https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi

The latest FWs are available by the following link:​

https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/

If the kernel version corresponds to the Wireless adapter, proceed with step 2.

 

Step 2: Check whether the Wireless adapter is connected correctly:

Type the following command to the terminal: # lspci​ 

Verify that the Intel network controller ​is identified, as on a picture below. If not, then the system doesn't identify the Intel networidentifyk adapter and you will need to make sure it's properly integrated. You may need to request help from the system manufacturer. If the wireless adapter is properly identified - proceed with the step 3.

Alberto_R_Intel_0-1607702847238.png

 

Step 3: Check whether this is an iwlwifi issue:

Type the following command to the terminal: # modinfo iwlwifi​ (example of the command output is on the picture below). If there is no output, then the module isn’t installed this is the distribution installation issue.

Alberto_R_Intel_1-1607702922963.png

 

Please type: # lsmod | grep iwlwifi​   

Alberto_R_Intel_2-1607702995630.png

 

If the result is empty, the driver hasn't been loaded. Most likely to be a distribution issue.

To verify, please type: # dmesg | grep iwlwifi​   

Alberto_R_Intel_3-1607703111462.png

 

If the result is empty, the driver wasn’t initialized and this is a distribution issue. If the result is populated as on the above picture, proceeed with the step 4.

 

Step 4: Check whether the suitable firmware is installed:

Please type: # dmesg | grep “no suitable firmware found!”​

Alberto_R_Intel_4-1607703202717.png

 

If the result is not empty, it means you don’t have a suitable FW (api mentioned in the dmesg).

Please visit here​ https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi for supported FW, or here​ ​https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/ for the latest versions.

If these steps didn't reveal the issue or didn't solve the problem, proceed with the Step 5: 

 

Step 5: Collect the debug data:

Please type: # dmesg | grep ASSERT​ 

If the output is empty, please follow this wiki: https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/debugging to extract dmesg and trace-cmd.

If the output has value, please collect from the wiki FW dump too.

 

Any questions, please let me know.

 

Regards,

Albert R.

 

Intel Customer Support Technician

A Contingent Worker at Intel

 

 

Alberto_Sykes
Employee
1,801 Views

Hello optimisme, I just wanted to check if you saw the information posted previously and if you need further assistance on this matter?


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


optimisme
Novice
1,788 Views

Yes, I have seen it.

I need time to take screenshots of your recommendations, but as you can see on the previous posts, the NIC is properly detected and the driver running like in your examples.

 

Albert

optimisme
Novice
1,787 Views

Hi,

I attached the screenshots of your request.

Alberto_Sykes
Employee
1,770 Views

Hi optimisme, No problem at all, thank you very much for providing that information and the screenshots requested, we completely understand that it takes time in order to try to get them.


We will do further research on this matter, as soon as I get any updates I will post all the details on this thread.


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


Alberto_Sykes
Employee
1,743 Views

Hello optimisme, I just received an update on this matter.


The dmesg.txt indicate the following:

Conflict between TLV & NVM regarding enabling LAR (TLV = enabled NVM =disabled)

 

Please try the command as suggested in:

https://askubuntu.com/questions/1040547/system-with-intel-wireless-ac-9462-freezes-unless-wifi-is-di...

sudo modprobe -r iwlwifi

sudo modprobe iwlwifi lar_disable=Y


Once you get the chance, please let us know the results.


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


Alberto_Sykes
Employee
1,710 Views

Hello optimisme, I just wanted to check if the information posted previously was useful for you and if you need further assistance on this matter?


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


Alberto_Sykes
Employee
1,676 Views

Hello optimisme, Since I have not heard back from you, we are closing the case, but if you have any additional questions, please post them on a new thread so we can further assist you with this matter.


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


Alberto_Sykes
Employee
1,628 Views

Hello optimisme, Just to confirm, did check if the information posted previously, do you still need further assistance on this matter?


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


optimisme
Novice
1,081 Views

Hi,

Thank you for

- Not solving the problem

- Asking me to reopen the ticket several times without solving the problem

- Asking me to send the information several times without solving the problem

Your hardware works great on Windows, congratulations.

But it does not work on Linux.

I bought an M1 (yes, the Mac M1 that is cheaper and faster).

My Wifi problems are solved

Thank you for your time, I won't need your help in a long time

Reply