2023-12-16 11:26:26

by Paul Menzel

[permalink] [raw]
Subject: Linux warns `HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.`

Dear Linux folks,


On a Dell XPS 13 9360 with

ID 0cf3:e300 Qualcomm Atheros Communications QCA61x4 Bluetooth 4.0

Linux 6.6 warns:

$ dmesg
[ 0.000000] microcode: updated early: 0xf0 -> 0xf4, date =
2023-02-22
[ 0.000000] Linux version 6.6-amd64
([email protected]) (gcc-13 (Debian 13.2.0-8) 13.2.0, GNU
ld (GNU Binutils for Debian) 2.41.50.20231202) #1 SMP PREEMPT_DYNAMIC
Debian 6.6.4-1~exp1 (2023-12-03)
[…]
[ 0.000000] DMI: Dell Inc. XPS 13 9360/0596KF, BIOS 2.21.0
06/02/2022
[…]
[ 0.456973] microcode: Microcode Update Driver: v2.2.
[…]
[ 27.179867] Bluetooth: hci0: HCI Enhanced Setup Synchronous
Connection command is advertised, but not supported.
[…]

As a user, I do not know what to do about the warning. How can I adress
it? Is that a firmware issue of the USB Bluetooth device, and should I
contact them? It’d be great if the warning could contain that information.


Kind regards,

Paul