Public bug reported:
Bluetooth worked normally on Ubuntu 24.04 LTS on this same laptop and
hardware. After upgrading to Ubuntu 26.04 LTS, Bluetooth is no longer
detected or available.
Hardware:
* ASUS VivoBook X512FB
* Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter
* PCI ID: 168c:0042
* Subsystem: Lite-On Communications Inc. 11ad:0836
* BIOS: X512FB.304 (08/26/2019)
The Wi-Fi functionality of the QCA9377 continues to work normally.
The Bluetooth controller is not detected:
* `bluetoothctl list` returns no controller.
* `lsusb` does not show a Bluetooth device.
* No HCI device is present under `/sys/class/bluetooth`.
* `rfkill` shows Bluetooth as unblocked.
* `btusb` can be loaded successfully with `modprobe`, but no Bluetooth
controller appears.
The kernel log shows repeated USB enumeration failures on internal USB
port 1-10:
`usb 1-10: device descriptor read/64, error -110`
followed by:
`xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command`
`usb 1-10: Device not responding to setup address.`
`usb 1-10: device not accepting address 6, error -71`
and finally:
`usb usb1-port10: unable to enumerate USB device`
The Bluetooth core and `btusb` driver are loaded, but no HCI controller
is created because the underlying USB device fails to enumerate.
The same laptop and QCA9377 hardware worked normally under Ubuntu 24.04
LTS. The Bluetooth problem appeared after upgrading to Ubuntu 26.04 LTS.
This may be a kernel/USB/driver regression, as the same hardware worked
normally on Ubuntu 24.04 LTS. However, I cannot confirm whether the
issue is specifically a kernel regression yet.
Expected behavior:
The internal QCA9377 Bluetooth controller should be detected and available
through `bluetoothctl`.
Actual behavior:
The Bluetooth controller fails USB enumeration with errors -110 and -71, no HCI
controller is created, and Bluetooth is unavailable.
Wi-Fi continues to work normally on the same QCA9377 adapter.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-30-generic 7.0.0-30.30
ProcVersionSignature: Ubuntu 7.0.0-30.30-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: leonardo 3444 F.... wireplumber
/dev/snd/seq: leonardo 3433 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 1 19:26:53 2026
InstallationDate: Installed on 2026-08-28 (4 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 13d3:56d3 IMC Networks USB2.0 HD UVC WebCam
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Lsusb-t:
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/12p, 480M
|__ Port 006: Dev 003, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 006: Dev 003, If 1, Class=Video, Driver=uvcvideo, 480M
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 10000M
MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X512FB_X512FB
ProcEnviron:
LANG=pt_BR.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-30-generic
root=UUID=810b2ac5-8f88-4cc7-9814-dc3780fab91a ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/26/2019
dmi.bios.release: 5.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X512FB.304
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X512FB
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrX512FB.304:bd08/26/2019:br5.13:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX512FB_X512FB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX512FB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:pfaVivoBook:
dmi.product.family: VivoBook
dmi.product.name: VivoBook_ASUSLaptop X512FB_X512FB
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2166119
Title:
QCA9377 Bluetooth not detected on Ubuntu 26.04; USB enumeration fails
with errors -110 and -71
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