topic Re: AX200 - Passive BLE scan - linux in Wireless

AX200 - Passive BLE scan - linux

mm8803123 — Wed, 11 Nov 2020 14:35:47 GMT

Hi,

I'm using Asus X570-E gaming, with built in intel ax200 - bluetooth 5.0.

I can issue BLE connections, normal BLE scans and it works OK. Wifi also works OK.
However there seems to be no way to issue a passive scan.

I'm mostly using bluepy, but i tried with pure bluez tools.
Same SW stack is working OK on cheap BLE 4.0 dongle, or Centino N-6235 (on my older laptop)

HW: Intel AX 200 (on Asus X570E gaming)
SW: Linux kernel 5.9.3 (Manjaro)

Steps to reproduce:
- using python3 in a temporary directory

python3 -m venv .venv && source .venv/bin/activate # create clean venv pip install --upgrade pip # update pip just in case pip install bluepy # install bluepy and it's dependencies (bluez) # next line work OK sudo blescan # sudo needed for BLE scan permissions... # next line fails, sine it uses passive scan sudo python .venv/lib/python3.8/site-packages/bluepy/scanner.py

This is an example (using btmon to sniff hci traffic) when passive scan is issued.

@ MGMT Open: bluetoothd (privileged) version 1.18 {0x0001} 0.280194 @ MGMT Open: bluepy-helper (privileged) version 1.18 {0x0002} 22.739867 @ MGMT Command: Read Management Version Information (0x0001) plen 0 {0x0002} 22.739920 @ MGMT Event: Command Complete (0x0001) plen 6 {0x0002} 22.739924 Read Management Version Information (0x0001) plen 3 Status: Success (0x00) Version: 1.18 @ MGMT Command: Set Low Energy (0x000d) plen 1 {0x0002} [hci0] 22.739965 Low Energy: Enabled (0x01) @ MGMT Event: Command Complete (0x0001) plen 7 {0x0002} [hci0] 22.739968 Set Low Energy (0x000d) plen 4 Status: Success (0x00) Current settings: 0x00000ad1 Powered Bondable Secure Simple Pairing BR/EDR Low Energy Secure Connections @ RAW Open: bluepy-helper (privileged) version 2.22 {0x0003} [hci0] 22.740140 < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 #1 [hci0] 22.740165 Scanning: Disabled (0x00) Filter duplicates: Disabled (0x00) > HCI Event: Command Complete (0x0e) plen 4 #2 [hci0] 22.858377 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Command Disallowed (0x0c) < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7 #3 [hci0] 22.858447 Type: Passive (0x00) Interval: 10.000 msec (0x0010) Window: 10.000 msec (0x0010) Own address type: Public (0x00) Filter policy: Accept all advertisement (0x00) > HCI Event: Command Complete (0x0e) plen 4 #4 [hci0] 22.862378 LE Set Scan Parameters (0x08|0x000b) ncmd 1 Status: Command Disallowed (0x0c) @ RAW Open: bluepy-helper (privileged) version 2.22 {0x0004} [hci0] 24.864574 < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 #5 [hci0] 24.864596 Scanning: Disabled (0x00) Filter duplicates: Disabled (0x00) > HCI Event: Command Complete (0x0e) plen 4 #6 [hci0] 24.867373 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Command Disallowed (0x0c)

If i do

sudo hcitool cmd 0x03 0x0003

before that, btmon returns Status as ""Success" everywhere, however no devices are scanned. And afterwards passive scan fails...

Is this linux driver issue, does HW not support passive scan, or am i missing something obvious?

Thanks in advance

Re:AX200 - Passive BLE scan - linux

Maria_R_Intel — Fri, 13 Nov 2020 08:53:13 GMT

Hello mm8803123,

Thank you for posting on the Intel* Community.

I am currently checking the information you provided internally, please expect a response soon.

Best regards,

Maria R.

Intel Customer Support Technician

Re: AX200 - Passive BLE scan - linux

Maria_R_Intel — Sat, 12 Dec 2020 05:12:50 GMT

Hello mm8803123,

Thank you for patiently waiting.

The engineering team has reviewed the information and it seems to be incomplete, you only provided the btmon trace, and we would like to know if you can provide the entire btmon logs for further analysis.

We will need this information to continue.

Best regards,

Maria R.

Intel Customer Support Technician

Re:AX200 - Passive BLE scan - linux

Maria_R_Intel — Thu, 17 Dec 2020 02:33:01 GMT

Hello mm8803123,

Were you able to check the previous post?

Let me know if you need more assistance.

Best regards,

Maria R.

Intel Customer Support Technician

Re: Re:AX200 - Passive BLE scan - linux

mm8803123 — Fri, 18 Dec 2020 20:25:17 GMT

Hi,
I'll try to produce logs this weekend.

Just to confirm,

I'm going to use command for ble trace:
btmon -w <trace_file>

And provide
dbus.log file for dbus communication log
and
syslog file for bluetoothd

Is there anything else i can provide or any other file you need?

Thanks,

Re:AX200 - Passive BLE scan - linux

Maria_R_Intel — Mon, 21 Dec 2020 15:08:57 GMT

Hello mm8803123,

That is the only information we need at the moment; we will let you know if the team requests more info after checking the information you will provide.

Thank you

Best regards,

Maria R.

Intel Customer Support Technician

Re:AX200 - Passive BLE scan - linux

Maria_R_Intel — Thu, 24 Dec 2020 22:45:39 GMT

Hello mm8803123,

Were you able to check the previous post?

Let me know if you need more assistance.

Best regards,

Maria R.

Intel Customer Support Technician

Re: AX200 - Passive BLE scan - linux

Maria_R_Intel — Sat, 09 Jan 2021 01:31:05 GMT

Hello mm8803123,

We have not heard back from you, please let us know if you still need assistance.

Best regards,

Maria R.

Intel Customer Support Technician

Re:AX200 - Passive BLE scan - linux

Maria_R_Intel — Sat, 09 Jan 2021 01:42:50 GMT

Hello mm8803123,

Happy New Year!

We thought that as per the Holidays you might not gather the information so we are following up on your thread, please let us know if you need more time.

Best regards,

Maria R.

Intel Customer Support Technician

Re: Re:AX200 - Passive BLE scan - linux

mknapik — Mon, 16 Jan 2023 11:07:21 GMT

Hi,

we have same problem with AX 200 on:

HW: imx8
SW: balenaOS 2.108.1

Normal BLE scan works fine, however there seems to be no way to process a passive scan.
Passive scan is working fine on same SW stack with BLE 4.0 dongle (Gembird BTD-MINI5 - it shout have Qualcomm CSR8510 A10).

We try passive scan with hcitool:

hcitool -i hci0 cmd 0x08 0x000b 00 00 10 00 10 00 00

and also with bluepy-helper:

# bluepy-helper.c version 1.3.0 built at 11:21:29 on Dec 20 2022 pasv rsp=$mgmtcode=$badstate

and both returned (see btmon_debug.zip file) this:

Bluetooth monitor ver 5.64 = Note: Linux version 5.10.72-iot-gate-imx8-3.0 (aarch64) 0.839105 = Note: Bluetooth subsystem version 2.22 0.839115 = New Index: E0:D4:E8:73:99:2E (Primary,USB,hci0) [hci0] 0.839118 = Open Index: E0:D4:E8:73:99:2E [hci0] 0.839120 = Index Info: E0:D4:E8:73:99:2E (Intel Corp.) [hci0] 0.839122 @ RAW Open: bluepy-helper (privileged) version 2.22 {0x0003} [hci0] 0.839124 @ MGMT Open: bluepy-helper (privileged) version 1.18 {0x0002} 0.839126 @ MGMT Open: bluetoothd (privileged) version 1.18 {0x0001} 0.839128 @ RAW Open: bluepy-helper (privileged) version 2.22 {0x0004} [hci0] 8.131642 < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 #1 [hci0] 8.131714 Scanning: Disabled (0x00) Filter duplicates: Disabled (0x00) > HCI Event: Command Complete (0x0e) plen 4 #2 [hci0] 8.133771 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Command Disallowed (0x0c) < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7 #3 [hci0] 8.133887 Type: Passive (0x00) Interval: 10.000 msec (0x0010) Window: 10.000 msec (0x0010) Own address type: Public (0x00) Filter policy: Accept all advertisement (0x00) > HCI Event: Command Complete (0x0e) plen 4 #4 [hci0] 8.135768 LE Set Scan Parameters (0x08|0x000b) ncmd 1 Status: Command Disallowed (0x0c)

So, we would like to know what is the problem and possibly how it could be fixed.

Thanks.

Re: AX200 - Passive BLE scan - linux

mmmmmmmmm — Sat, 18 May 2024 19:54:01 GMT

What is the status of this bug? I have 2 brand new systems unable to detect BLE clients.

ref. https://wiki.archlinux.org/title/bluetooth#No_BLE_device_can_be_discovered_with_Intel_Corp._AX200_Bluetooth

Previous posters have already reported the necessary background information, so I am not repeating this here.

It is concerning to see Intel sitting on this issue for so long. This was first reported over 3 years ago!

Is there a formal bug report system I can use to track this issue?

Re: AX200 - Passive BLE scan - linux

alexop — Mon, 10 Jun 2024 11:20:35 GMT

bump,
I'm already regretting upgrading my mediatek WiFi card to intel

Re: AX200 - Passive BLE scan - linux

bm16ton — Fri, 18 Jul 2025 22:05:21 GMT

Ok finally got passive scanning going. Besides the normal scanning commands i needed send the reset command first (0x03 0x0003 0) and after sending the scan configs i have to set the event mask (0x03 0x0001 0x3dbff807fffbffff) and then and only then does passive scans for advertising packets work. Bluez 5.72 kernel 6.15 and 6.12 AX210. firmware version 200-48.24. Ubuntu 24.04.2 and debian trixie. Only strangeness is the eventmask is auto sent on my one machine running kernel 6.12. All machines are same make and model, all same libs/firmwares etc. But only this one box with one kernel just sends it automatically. A link to my app for sending/receiving advertising data is github.com/bm16ton/bltool