[Bug 219894] New: Bluetooth Qualcomm WCN785x - Input/output error

[Bug 219894] New: Bluetooth Qualcomm WCN785x - Input/output error

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=219894

            Bug ID: 219894
           Summary: Bluetooth Qualcomm WCN785x - Input/output error
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: agurenko@protonmail.com
        Regression: No

I've got today new MSI X870E Tomahawk WiFi board and it comes with Qualcomm
WCN785x for WiFi/Bluetooth. While Bluetooth is available and can scan for the
devices, I cannot complete the pairing process with following errors in logs:

Mar 19 00:56:01 bluetoothd[1456]: src/device.c:search_cb() EC:73:79:59:9A:4E:
error updating services: Input/output error (5)
Mar 19 00:56:17 bluetoothd[1456]: src/device.c:search_cb() EC:73:79:59:9A:4E:
error updating services: Input/output error (5)
Mar 19 00:56:17 bluedevil-wizard[40108]: kf.bluezqt: PendingCall Error:
"br-connection-create-socket"

I can see that device is added and set to trusted, but attempt to connect shows
the same error:

Mar 19 00:57:33 bluetoothd[1456]: src/device.c:search_cb() EC:73:79:59:9A:4E:
error updating services: Input/output error (5)
Mar 19 00:57:33 systemsettings[40016]: kf.bluezqt: PendingCall Error:
"br-connection-create-socket"

Please let me know what other information I can provide to help.

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[Bug 219894] Bluetooth Qualcomm WCN785x - Input/output error

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=219894

--- Comment #1 from Gurenko Alex (agurenko@protonmail.com) ---
So, I seems to workaround the problem by passing bluetooth device into the
Windows 11 VM and installing driver
(https://download.msi.com/dvr_exe/mb/qualcomm_ncm865_bt.zip) for what is
written as Qualcomm NCM865 (WCN785x is probably a WiFi part?)

Is it probably a missing firmware (dfu files in the package) and now it's using
the one windows loaded?

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[Bug 219894] Bluetooth Qualcomm WCN785x - Input/output error

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=219894

--- Comment #2 from Gurenko Alex (agurenko@protonmail.com) ---
Interesting and unpleasant development, I've upgraded kernel from 6.14.0-rc.7
to 6.14.0 and again it stopped working, until I passed Bluetooth into the VM,
disconnected from VM and it immediately started working, so it's not a
permanent solution

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[Bug 219894] Bluetooth Qualcomm WCN785x - Input/output error

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https://bugzilla.kernel.org/show_bug.cgi?id=219894

Gurenko Alex (agurenko@protonmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|                            |6.14.0
           Severity|normal                      |high

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[Bug 219894] Bluetooth Qualcomm WCN785x - Input/output error

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=219894

Gurenko Alex (agurenko@protonmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #3 from Gurenko Alex (agurenko@protonmail.com) ---
Thanks to the background work, the issue is now resolved.

New firmware added into linux-firmware as of 20250410 release -
https://gitlab.com/kernel-firmware/linux-firmware/-/merge_requests/510

Kernel 6.14.3 contains the kernel fix:

commit ece126a8a2f571ee89b65656ec73e41fe9ea36c2
Author: Zijun Hu <quic_zijuhu@quicinc.com>
Date:   Tue Jan 21 19:46:42 2025 -0800

    Bluetooth: btusb: Add 13 USB device IDs for Qualcomm WCN785x

    [ Upstream commit 2dd1c1eee3e496fcc16971be4db5bb792a36025c ]

I can confirm it's working on Fedora 42 with said versions. Thank you for the
fix.

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