I just tested it and yes, the issue still happens. I switched to
different headphones a while ago though, which don't seem to trigger the
bug, so perhaps the connected device matters here. The device that
triggers the bug is JBL TUNE700BT, but Samsung Buds3 Pro seem to work
fine.


Version tested:

Package: linux-firmware
Version: 20240318.git3b128b60-0ubuntu2

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 24.04.2 LTS
Release:        24.04
Codename:       noble

$ uname -a
Linux krzysh-laptop 6.11.0-19-generic #19~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC 
Mon Feb 17 11:51:52 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

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https://bugs.launchpad.net/bugs/2017877

Title:
  Intel Wireless 7260 - bluetooth drops from USB bus almost immediately
  after connecting a device on the lastest firmware

Status in linux-firmware package in Ubuntu:
  Incomplete

Bug description:
  The bluetooth in my Intel Wireless 7260 on my Thinkpad W541 resets
  almost immediately after a device connects. This is seen in dmesg as
  the device disconnecting and reconnecting to the USB bus with no other
  error messages, like this:

  [603851.305788] Bluetooth: hci0: Legacy ROM 2.5 revision 8.0 build 1 week 45 
2013
  [603851.305827] Bluetooth: hci0: Intel Bluetooth firmware file: 
intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
  [603851.443776] Bluetooth: hci0: unexpected event for opcode 0xfc2f
  [603851.460922] Bluetooth: hci0: Intel BT fw patch 0x2a completed & activated
  [603871.948430] usb 3-11: USB disconnect, device number 36
  [603872.273696] usb 3-11: new full-speed USB device number 37 using xhci_hcd
  [603872.422912] usb 3-11: New USB device found, idVendor=8087, 
idProduct=07dc, bcdDevice= 0.01
  [603872.422916] usb 3-11: New USB device strings: Mfr=0, Product=0, 
SerialNumber=0
  [603872.437854] Bluetooth: hci0: Legacy ROM 2.5 revision 8.0 build 1 week 45 
2013
  [603872.437873] Bluetooth: hci0: Intel device is already patched. patch num: 
2a
  [603894.932755] input: JBL TUNE700BT (AVRCP) as 
/devices/virtual/input/input113
  [603898.742664] usb 3-11: USB disconnect, device number 37
  [603899.057916] usb 3-11: new full-speed USB device number 38 using xhci_hcd
  [603899.211235] usb 3-11: New USB device found, idVendor=8087, 
idProduct=07dc, bcdDevice= 0.01
  [603899.211241] usb 3-11: New USB device strings: Mfr=0, Product=0, 
SerialNumber=0
  [603899.226972] Bluetooth: hci0: Legacy ROM 2.5 revision 8.0 build 1 week 45 
2013
  [603899.226988] Bluetooth: hci0: Intel device is already patched. patch num: 
2a
  [603909.785396] input: JBL TUNE700BT (AVRCP) as 
/devices/virtual/input/input114
  [603914.565733] usb 3-11: USB disconnect, device number 38
  [603916.905954] usb 3-11: new full-speed USB device number 39 using xhci_hcd
  [603917.055128] usb 3-11: New USB device found, idVendor=8087, 
idProduct=07dc, bcdDevice= 0.01
  [603917.055147] usb 3-11: New USB device strings: Mfr=0, Product=0, 
SerialNumber=0
  [603917.071869] Bluetooth: hci0: Legacy ROM 2.5 revision 8.0 build 1 week 45 
2013
  [603917.071877] Bluetooth: hci0: Intel device is already patched. patch num: 
2a

  This has been a problem ever since I got this laptop, but recently I
  managed to fix it by downgrading the ibt firmware. I downgraded the
  /lib/firmware/intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq file to this
  version
  https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-
  firmware.git/commit/intel/ibt-
  hw-37.7.10-fw-1.80.1.2d.d.bseq?id=fb328183532ffc7a1a54e84fb53467e275a95b79
  and after that all problems stopped.

  System info:

  $ lsb_release -rd                
  Description:  Ubuntu 22.04.2 LTS
  Release:      22.04
  $ apt-cache policy linux-firmware
  linux-firmware:
    Installed: 20220329.git681281e4-0ubuntu3.12
    Candidate: 20220329.git681281e4-0ubuntu3.12
    Version table:
   *** 20220329.git681281e4-0ubuntu3.12 500
          500 http://pl.archive.ubuntu.com/ubuntu jammy-updates/main amd64 
Packages
          500 http://pl.archive.ubuntu.com/ubuntu jammy-updates/main i386 
Packages
          500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 
Packages
          500 http://security.ubuntu.com/ubuntu jammy-security/main i386 
Packages
          100 /var/lib/dpkg/status
       20220329.git681281e4-0ubuntu1 500
          500 http://pl.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
          500 http://pl.archive.ubuntu.com/ubuntu jammy/main i386 Packages
  $ lspci -vvvv
  (see attachment)
  $ lsusb -vvvvv
  (see attachment)
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu82.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  krzys_h    1511 F.... pulseaudio
   /dev/snd/controlC2:  krzys_h    1511 F.... pulseaudio
   /dev/snd/controlC0:  krzys_h    1511 F.... pulseaudio
  CasperMD5CheckResult: unknown
  CurrentDesktop: GNOME
  Dependencies: firmware-sof-signed 2.0-1ubuntu4.1
  DistroRelease: Ubuntu 22.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-02-28 (3346 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 
(20131016.1)
  MachineType: LENOVO 20EGS2G300
  Package: linux-firmware 20220329.git681281e4-0ubuntu3.12 [modified: 
lib/firmware/intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq]
  PackageArchitecture: all
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-71-generic 
root=UUID=4270eaa2-2664-4fb3-9d5f-f24328454960 ro rootflags=subvol=@ splash 
vt.handoff=7
  ProcVersionSignature: Ubuntu 5.15.0-71.78-generic 5.15.92
  RelatedPackageVersions:
   linux-restricted-modules-5.15.0-71-generic N/A
   linux-backports-modules-5.15.0-71-generic  N/A
   linux-firmware                             20220329.git681281e4-0ubuntu3.12
  Tags:  jammy
  Uname: Linux 5.15.0-71-generic x86_64
  UpgradeStatus: Upgraded to jammy on 2022-07-29 (273 days ago)
  UserGroups: adm bluetooth cdrom dialout dip docker input libvirt lpadmin lxd 
plugdev sambashare sudo vboxusers wireshark
  _MarkForUpload: True
  dmi.bios.date: 08/23/2019
  dmi.bios.release: 2.40
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GNET92WW (2.40 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20EGS2G300
  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: Not Available
  dmi.ec.firmware.release: 1.15
  dmi.modalias: 
dmi:bvnLENOVO:bvrGNET92WW(2.40):bd08/23/2019:br2.40:efr1.15:svnLENOVO:pn20EGS2G300:pvrThinkPadW541:rvnLENOVO:rn20EGS2G300:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:skuLENOVO_MT_20EG:
  dmi.product.family: ThinkPad W541
  dmi.product.name: 20EGS2G300
  dmi.product.sku: LENOVO_MT_20EG
  dmi.product.version: ThinkPad W541
  dmi.sys.vendor: LENOVO

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