[Intel 7265][ThinkPad T450s] Bluetooth devices disconnect, connect, disconnect

[Thomas Schweikle]

Paired Bluetooth devices are connected, then disconnected, connected again, then finally disconected.

This is with
- Ubuntu, xUbuntu 21.10
- Ubuntu, xUbuntu 22.04(beta)

It works with
- kali (latest)
- debian 11.3 (latest)

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: bluez 5.64-0ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30
Uname: Linux 5.15.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu81
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Wed Apr 13 13:31:07 2022
InstallationDate: Installed on 2021-08-18 (238 days ago)
InstallationMedia: Xubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: LENOVO 20BWS33U00
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_sxscpx@/vmlinuz-5.15.0-25-generic root=ZFS=rpool/ROOT/ubuntu_sxscpx ro splash vt.handoff=1
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/12/2015
dmi.bios.release: 1.17
dmi.bios.vendor: LENOVO
dmi.bios.version: JBET52WW (1.17 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BWS33U00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.1
dmi.modalias: dmi:bvnLENOVO:bvrJBET52WW(1.17):bd08/12/2015:br1.17:efr1.1:svnLENOVO:pn20BWS33U00:pvrThinkPadT450s:rvnLENOVO:rn20BWS33U00:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20BW_BU_Think_FM_ThinkPadT450s:
dmi.product.family: ThinkPad T450s
dmi.product.name: 20BWS33U00
dmi.product.sku: LENOVO_MT_20BW_BU_Think_FM_ThinkPad T450s
dmi.product.version: ThinkPad T450s
dmi.sys.vendor: LENOVO
hciconfig:
 hci0: Type: Primary Bus: USB
  BD Address: 4C:34:88:AE:51:86 ACL MTU: 1021:5 SCO MTU: 96:6
  UP RUNNING PSCAN
  RX bytes:3994 acl:7 sco:0 events:403 errors:0
  TX bytes:46327 acl:7 sco:0 commands:367 errors:0

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Daniel van Vugt (vanvugt)]

Can you identify other common factors among the non-working and working distros?
 - Kernel version
 - BlueZ version
 - Intermediate software like gnome-bluetooth
 - Bluetooth firmware version reported in the kernel log, currently:
   intel/ibt-hw-37.8.10-fw-1.10.3.11.e.bseq

[Thomas Schweikle (tps)]

Meanwhile even the distros working until yesterday stopped working today (5. May 2022 around 22:00).

The bug seems related to pipewire and switching to this new infrastructure.
It breaks nearly everything related with sound and bluetooth.

Modules involved:
- pipewire-pulse
- wireplumber

[Thomas Schweikle (tps)]

These modules seem to collide with pipewire-media-session, but are required by bluez-stack to connect bluetooth headsets (or other devices) to pulseaudio.

[Daniel van Vugt (vanvugt)]

Indeed those modules are not installed in vanilla Ubuntu. We don't use PipeWire for audio or Bluetooth, although Kubuntu/Xubuntu might.

[Thomas Schweikle (tps)]

xubuntu and kubuntu, as lubuntu do use pipewire for audio.
kali switched last night to use it.
openSUSE did so too.

i did not test on a plain vanilla gnome based ubuntu until now. Will do it later this day (if time permits).

[Launchpad Janitor (janitor)]

[Expired for bluez (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]