Bluetooth adapter not visible. In bluetooth menu, we see "no bluetooth found". (Ubuntu 20.04, kernel 5.4.0-26-generic #30-Ubuntu)
$ lspci -nnk | grep -iA3 atheros
02:00.0 Network controller [0280]: Qualcomm Atheros AR9287 Wireless Network Adapter (PCI-Express) [168c:002e] (rev 01)
Subsystem: Foxconn International, Inc. T77H167.00 [105b:e034]
Kernel driver in use: ath9k
Kernel modules: ath9k
I tried to load the module with btcoex_enable=1, does not help :
$ cat /etc/modprobe.d/ath9k-bt.conf
options ath9k btcoex_enable=1
$ cat /sys/module/ath9k/parameters/btcoex_enable
1
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jonathan 1459 F.... pulseaudio
CasperMD5CheckResult: skip
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-04-18 (10 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
MachineType: Acer Aspire 5742
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-28-generic root=UUID=9c207369-6eb3-4b54-97dd-693d3e0a3b6a ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-5.4.0-28-generic N/A
linux-backports-modules-5.4.0-28-generic N/A
linux-firmware 1.187
Tags: focal
Uname: Linux 5.4.0-28-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 08/13/2012
dmi.bios.vendor: Acer
dmi.bios.version: V1.30
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 5742
dmi.board.vendor: Acer
dmi.board.version: V1.30
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.30
dmi.modalias: dmi:bvnAcer:bvrV1.30:bd08/13/2012:svnAcer:pnAspire5742:pvrV1.30:rvnAcer:rnAspire5742:rvrV1.30:cvnAcer:ct10:cvrV1.30:
dmi.product.family: Intel_Mobile
dmi.product.name: Aspire 5742
dmi.product.sku: Calpella_CRB
dmi.product.version: V1.30
dmi.sys.vendor: Acer
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1874435
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.