At the 17:57 keyboard disconnected, but I can't find anything about in
logs.

Logs:

17:58:00 dbus-daemon: [session uid=1000 pid=3545] Successfully activated 
service 'org.gnome.Terminal'
17:57:59 systemd: Starting GNOME Terminal Server...
17:57:59 dbus-daemon: [session uid=1000 pid=3545] Activating service 
name='org.gnome.Epiphany.SearchProvider' requested by ':1.41' (uid=1000 
pid=3786 comm="/usr/bin/gnome-shell " label="unconfined")
17:57:55 portmaster-star: 220312 17:57:55.158 connection:629 ▶ INFO 
069 filter: connection as:/opt/google/chrome/chrome:5753 to 
mail.google.com. (216.58.208.197) accepted: allowed by default action
17:57:46 upowerd: treating change event as add on 
/sys/devices/pci0000:00/0000:00:08.1/0000:05:00.4/usb3/3-3
17:57:45 kernel: usb 3-4: reset full-speed USB device number 6 using xhci_hcd
17:57:36 portmaster-star: 220312 17:57:36.362 connection:629 ▶ INFO 
061 filter: connection as:/opt/google/chrome/chrome:5753 to 
syndication.twitter.com. (104.244.42.8) accepted: allowed by default action
17:55:40 upowerd: treating change event as add on 
/sys/devices/pci0000:00/0000:00:08.1/0000:05:00.4/usb3/3-3


dmesg -T:

[sob mar 12 17:55:39 2022] usb 3-3: reset high-speed USB device number 2 using 
xhci_hcd
[sob mar 12 17:57:44 2022] usb 3-3: reset high-speed USB device number 2 using 
xhci_hcd
[sob mar 12 17:57:44 2022] usb 3-4: reset full-speed USB device number 6 using 
xhci_hcd
[sob mar 12 18:06:47 2022] Bluetooth: hci0: command 0x0c03 tx timeout

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https://bugs.launchpad.net/bugs/1964672

Title:
  Bluetooth disconnects after few minutes

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 21.10 (Impish)
  Bluetooth disconnects after few minutes, after kernel upgrade from 
5.13.0-28-generic to 5.13.0-35-generic. After connecting, it disconnects again 
after few minutes.

  To connect again these commands helps:

  hciconfig hci0 down
  rmmod btusb
  modprobe btusb
  hciconfig hci0 up

  
  Bluetooth in previous kernel was ok. This version of kernel have something 
like this in changelog:

    * Impish update: upstream stable patchset 2022-02-09 (LP: #1960452 
https://bugs.launchpad.net/bugs/1960452)
      - workqueue: Fix unbind_workers() VS wq_worker_running() race
      - Bluetooth: btusb: fix memory leak in btusb_mtk_submit_wmt_recv_urb()
      - Bluetooth: btusb: Add two more Bluetooth parts for WCN6855
      - Bluetooth: btusb: Add support for Foxconn QCA 0xe0d0
      - Bluetooth: bfusb: fix division by zero in send path
      - Bluetooth: btusb: Add the new support ID for Realtek RTL8852A
      - Bluetooth: btusb: Add support for IMC Networks Mediatek Chip(MT7921)
      - Bluetooth: btusb: Add another Bluetooth part for Realtek 8852AE
      - Bluetooth: btusb: Enable MSFT extension for Mediatek Chip (MT7921)
      - Bluetooth: btusb: enable Mediatek to support AOSP extension
      - Bluetooth: btusb: Add one more Bluetooth part for the Realtek RTL8852AE
      - Bluetooth: btusb: Add the new support IDs for WCN6855
      - Bluetooth: btusb: Add one more Bluetooth part for WCN6855
      - Bluetooth: add quirk disabling LE Read Transmit Power
      - Bluetooth: btbcm: disable read tx power for some Macs with the T2 
Security
        chip
      - Bluetooth: btbcm: disable read tx power for MacBook Air 8,1 and 8,2

  So I assume the bug was introduced here.

  https://bugs.launchpad.net/ubuntu/+source/linux/5.13.0-32.35

  Device connected with bluetooth was Thinkpad Bluetooth Keyboard
  KT-1255 (03X8714).

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: linux-image-5.13.0-35-generic 5.13.0-35.40
  ProcVersionSignature: Ubuntu 5.13.0-35.40-generic 5.13.19
  Uname: Linux 5.13.0-35-generic x86_64
  ApportVersion: 2.20.11-0ubuntu71
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  as         3537 F.... pulseaudio
   /dev/snd/controlC0:  as         3537 F.... pulseaudio
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Mar 12 17:20:35 2022
  InstallationDate: Installed on 2020-12-06 (461 days ago)
  InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  MachineType: LENOVO 20T6000TPB
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-35-generic 
root=UUID=a5796f3d-37a8-428b-aa28-c160ea77bc9b ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.13.0-35-generic N/A
   linux-backports-modules-5.13.0-35-generic  N/A
   linux-firmware                             1.201.5
  SourcePackage: linux
  UpgradeStatus: Upgraded to impish on 2021-10-18 (144 days ago)
  dmi.bios.date: 09/06/2021
  dmi.bios.release: 1.16
  dmi.bios.vendor: LENOVO
  dmi.bios.version: R1AET40W (1.16 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20T6000TPB
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.ec.firmware.release: 1.16
  dmi.modalias: 
dmi:bvnLENOVO:bvrR1AET40W(1.16):bd09/06/2021:br1.16:efr1.16:svnLENOVO:pn20T6000TPB:pvrThinkPadE14Gen2:rvnLENOVO:rn20T6000TPB:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20T6_BU_Think_FM_ThinkPadE14Gen2:
  dmi.product.family: ThinkPad E14 Gen 2
  dmi.product.name: 20T6000TPB
  dmi.product.sku: LENOVO_MT_20T6_BU_Think_FM_ThinkPad E14 Gen 2
  dmi.product.version: ThinkPad E14 Gen 2
  dmi.sys.vendor: LENOVO

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