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Cram_89
Novice
3,687 Views

Wireless Dual-Band AC 7260 Bluetooth issues with Windows 10 2004

Hello,

since the update from Windows 10 1909 to 2004 i have the problem that the bluetooth fails sporadically (sometimes after 10 minutes, sometimes only after 1 hour, sometimes 3 times behind each other within 5 minutes). My guess is that there are problems with the interaction of driver, BLE and Windows 10 2004. When I go back to 1909, everything works fine again. I have tried it again with every new Windows Build version (19041.XXX). Always without success. Currently I'm using the version Build 19041.508. Unfortunately I don't have the possibility to go back to 1909 anymore because the update was more than 7 days ago and Windows 10 doesn't offer this option anymore.

I use the Intel Dual Band Wireless-AC 7260 (HMC) in two notebooks. This was an upgrade part, which was installed by me years ago.

With Windows 10 1909 you could still set the power options of the Bluetooth adapter in the device manager. You had to disable (uncheck) "Allow the computer to turn off this device to save power" under the Power Management tab. After that you could work with the Bluetooth adapter without any problems. This option is no longer available under Windows 10 2004 with this Bluetooth adapter.

Every time the Bluetooth connection is lost, the hidden Bluetooth icon in the taskbar will show up again. This happens with hidden symbols actually only when they are reconnected and fade out after a short time by itself. Additionally there are two entries in the event viewer (Event Viewer -> Windows Logs -> System):

 

Log Name: System               Source: BTHUSB                   Date: 2020/10/01 22:35:48

Event ID: 18                          Task Category: None          Level: Information               Keywords: Classic

Description:

Windows cannot store Bluetooth authentication codes (link keys) on the local adapter. Bluetooth keyboards might not work in the system BIOS during startup.

Event Xml:

http://schemas.microsoft.com/win/2004/08/events/event">

18           4             0              0x80000000000000          3773

System

00000800010000000000000012000540000000000000000000000000000000000000000000000000E000000000000000

 

Log Name: System               Source: BTHUSB                   Date: 2020/10/01 22:35:48

Event ID: 34                          Task Category: None          Level: Warning                    Keywords: Classic

Description:

The local adapter does not support an important Low Energy controller state to support peripheral mode. The minimum required supported state mask is 0x491f7fffff, got 0x1fffffff. Low Energy peripheral role functionality will not be available.

Event Xml:

http://schemas.microsoft.com/win/2004/08/events/event">

34           3             0              0x80000000000000          4101

System

0x2491f7fffff       0x1fffffff

00000000030028000000000022000580000000000000000000000000000000000000000000000000

 

These events always follow each other.

I already tried to disable the power management function "Allow the computer to turn off this device to save power" for any device in the device manager (USB Hubs, Bluetooth Low Energy GATT compliant HID device, etc.), delete connection to old BT devices and start reconnection. Also tried other (older) drivers. All without success.

I have two notebooks from different manufacturers (ASUS and TERRA WORTMANN), using the Wireless Dual-Band AC 7260 adapter and the same problem. Both notebooks had no problems with Windows 10 1909 and the driver for WiFi (PROSet version = 21.10.1, driver version = 18.33.17.1) and Bluetooth (package version = 21.10.1, driver version = 20.100.5.1). Only with the update from Windows 10 to the current version 2004 (Build 19041.508) there are problems in operation.

For newer Intel Wireless Adapters there is an update 21.120.2, which fixes many problems (https://downloadmirror.intel.com/29849/eng/ReleaseNotes_WiFi_21.120.2.pdf). Unfortunately this driver cannot be used for the Intel Wireless 7260 Family adapters. Support for this product will end on December 30, 2020 and self-service support will begin on December 31, 2020 (https://www.intel.com/content/www/us/en/support/articles/000006507/network-and-i-o/wireless.html).

An old post from 2017 describes a similar bug from another user (https://community.intel.com/t5/Wireless/7260-ac-Bluetooth-regularly-disappears-Win10x64/td-p/601683) but without a solution.

Many other users have the same problem with the combination of Intel Wireless AC 7260 and Windows 10 2004 (https://answers.microsoft.com/en-us/windows/forum/all/windows-10-ent-update-feature-2004-bluetooth/5...).

 

In the appendix you can find the system reports of the System Support Utility of both notebooks.

I hope that someone can help me.

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43 Replies
Cram_89
Novice
210 Views

Hi @Jas68,

I do not have any documents on this. If you should rather ask @BigBill , because he has dealt with the topic.

Jas68
Beginner
201 Views

Sorry, @Cram_89, I confused who had posted what. @BigBill, can you point me to any documentation that confirms the newer chipset doesn't support AptX or Miracast? Thanks.
BigBill
Beginner
198 Views

 

 
 
 

I was mistaken, the AX200 does support Miracast as seen in the product brief here.

As for Aptx, from what I've seen in various forums, it's drivers that are the problem. Dell provide old drivers for the 8260 that work with the 8265. It's possible other manufacturers do too. You can find out more via a web search. I'm not sure Aptx is worth it though as the SBC codec is almost as good.

I probably would have just bought the AX200 with BT 5 and 802.11ax if I'd not been mistaken about Miracast as these are futureproof benefits worth having.

Jas68
Beginner
187 Views

Thank you, @BigBill. Sounds like it might be worth going for the AX200 and see how it goes. I'm actually back to running an Advanced-N 6235 that came (years ago) with my Latitude E6440. I had long ago switched to an Azurewave (Broadcom) AW-CE123H that generally worked fine on Windows but was becoming problematic on Arch Linux. Oddly enough, on Linux, Intel driver support seems best. FWIW, the 6235 seems to still work fine on Windows -- both wireless and BT -- and I'm on 20H2. But it doesn't even have AC support, and is only BT 4, so might be time for a small upgrade.