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[Bug 2115588] [NEW] Seeing repeated error in dmesg / kernel log for USB BT dongle

To: debcrafters-packages@xxxxxxxxxxxxxxxxxxx
From: ADFH <2115588@xxxxxxxxxxxxxxxxxx>
Date: Sun, 29 Jun 2025 08:55:26 -0000
Reply-to: Bug 2115588 <2115588@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
Public bug reported:

I'm seeing a lot of repeated errors in my kernel dmesg every few seconds
after a period of system being booted.

Unplugging the USB dongle and plugging it back in again seems to shut it
up for a bit.

USB dongle is ASUS USB-BT500 0b05:190e

Error repeating in log is along lines of:
2025-06-29T17:36:11.790979+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
2025-06-29T17:36:11.791021+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
2025-06-29T17:36:11.791024+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
2025-06-29T17:36:11.791026+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
2025-06-29T17:36:10.503156+10:00 AH03 rtkit-daemon[3005]: message repeated 5 times: [ Supervising 8 threads of 5 proce
sses of 1 users.]
2025-06-29T17:36:11.795114+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
2025-06-29T17:36:11.795495+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:11.902884+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
2025-06-29T17:36:12.042563+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
2025-06-29T17:36:12.042954+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:14.030890+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
2025-06-29T17:36:14.030941+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
2025-06-29T17:36:14.030945+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
2025-06-29T17:36:14.030949+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
2025-06-29T17:36:14.048321+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
2025-06-29T17:36:14.048996+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:14.143892+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
2025-06-29T17:36:14.287849+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:14.289436+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
2025-06-29T17:36:16.269918+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
2025-06-29T17:36:16.269966+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
2025-06-29T17:36:16.269969+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
2025-06-29T17:36:16.269971+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
2025-06-29T17:36:16.269975+10:00 AH03 kernel: Bluetooth: hci0: urb 00000000558d8ec1 failed to resubmit (2)
2025-06-29T17:36:16.277882+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
2025-06-29T17:36:16.278245+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:16.381881+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
2025-06-29T17:36:16.526848+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:16.527165+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
2025-06-29T17:36:18.509967+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
2025-06-29T17:36:18.509995+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
2025-06-29T17:36:18.509998+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
2025-06-29T17:36:18.509999+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
2025-06-29T17:36:18.523094+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:18.523350+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
2025-06-29T17:36:18.622889+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
2025-06-29T17:36:18.768905+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
2025-06-29T17:36:18.770504+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
2025-06-29T17:36:20.750930+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
2025-06-29T17:36:20.750980+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
2025-06-29T17:36:20.750984+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
2025-06-29T17:36:20.750988+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
2025-06-29T17:36:20.750990+10:00 AH03 kernel: Bluetooth: hci0: urb 000000000f171e90 failed to resubmit (2)

Not sure if bluez is right place for this bug, or it needs to go
somewhere else.. Bluetooth does seem to be working, but the logs are
awfully chatty.

ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: bluez 5.79-2ubuntu1.1
ProcVersionSignature: Ubuntu 6.14.0-22.22-generic 6.14.5
Uname: Linux 6.14.0-22-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 29 18:38:26 2025
InstallationDate: Installed on 2023-11-25 (582 days ago)
InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-22-generic root=UUID=e7ed7850-c7b5-48e9-aa48-4995fc8fbfc4 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7
SourcePackage: bluez
UpgradeStatus: Upgraded to plucky on 2025-05-23 (37 days ago)
dmi.bios.date: 08/08/2018
dmi.bios.release: 4.6
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.61
dmi.board.name: Z97 Pro4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.61:bd08/08/2018:br4.6:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ97Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
hciconfig:
 hci0:	Type: Primary  Bus: USB
 	BD Address: 08:BF:B8:4A:A3:8E  ACL MTU: 1021:6  SCO MTU: 255:12
 	UP RUNNING PSCAN 
 	RX bytes:1676 acl:0 sco:0 events:185 errors:0
 	TX bytes:33907 acl:0 sco:0 commands:185 errors:0
rfkill:
 1621: hci0: Bluetooth
 	Soft blocked: no
 	Hard blocked: no

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug plucky wayland-session

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https://bugs.launchpad.net/bugs/2115588

Title:
  Seeing repeated error in dmesg / kernel log for USB BT dongle

Status in bluez package in Ubuntu:
  New

Bug description:
  I'm seeing a lot of repeated errors in my kernel dmesg every few
  seconds after a period of system being booted.

  Unplugging the USB dongle and plugging it back in again seems to shut
  it up for a bit.

  USB dongle is ASUS USB-BT500 0b05:190e

  Error repeating in log is along lines of:
  2025-06-29T17:36:11.790979+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
  2025-06-29T17:36:11.791021+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
  2025-06-29T17:36:11.791024+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
  2025-06-29T17:36:11.791026+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
  2025-06-29T17:36:10.503156+10:00 AH03 rtkit-daemon[3005]: message repeated 5 times: [ Supervising 8 threads of 5 proce
  sses of 1 users.]
  2025-06-29T17:36:11.795114+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
  2025-06-29T17:36:11.795495+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:11.902884+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
  2025-06-29T17:36:12.042563+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
  2025-06-29T17:36:12.042954+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:14.030890+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
  2025-06-29T17:36:14.030941+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
  2025-06-29T17:36:14.030945+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
  2025-06-29T17:36:14.030949+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
  2025-06-29T17:36:14.048321+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
  2025-06-29T17:36:14.048996+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:14.143892+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
  2025-06-29T17:36:14.287849+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:14.289436+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
  2025-06-29T17:36:16.269918+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
  2025-06-29T17:36:16.269966+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
  2025-06-29T17:36:16.269969+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
  2025-06-29T17:36:16.269971+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
  2025-06-29T17:36:16.269975+10:00 AH03 kernel: Bluetooth: hci0: urb 00000000558d8ec1 failed to resubmit (2)
  2025-06-29T17:36:16.277882+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
  2025-06-29T17:36:16.278245+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:16.381881+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
  2025-06-29T17:36:16.526848+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:16.527165+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
  2025-06-29T17:36:18.509967+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
  2025-06-29T17:36:18.509995+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
  2025-06-29T17:36:18.509998+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
  2025-06-29T17:36:18.509999+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
  2025-06-29T17:36:18.523094+10:00 AH03 systemd[1]: Stopped target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:18.523350+10:00 AH03 systemd[3564]: Stopped target bluetooth.target - Bluetooth.
  2025-06-29T17:36:18.622889+10:00 AH03 kernel: usb 2-5: reset full-speed USB device number 4 using xhci_hcd
  2025-06-29T17:36:18.768905+10:00 AH03 systemd[3564]: Reached target bluetooth.target - Bluetooth.
  2025-06-29T17:36:18.770504+10:00 AH03 systemd[1]: Reached target bluetooth.target - Bluetooth Support.
  2025-06-29T17:36:20.750930+10:00 AH03 kernel: Bluetooth: hci0: command 0xfc61 tx timeout
  2025-06-29T17:36:20.750980+10:00 AH03 kernel: Bluetooth: hci0: RTL: Failed to generate devcoredump
  2025-06-29T17:36:20.750984+10:00 AH03 kernel: Bluetooth: hci0: Resetting usb device.
  2025-06-29T17:36:20.750988+10:00 AH03 kernel: Bluetooth: hci0: RTL: RTL: Read reg16 failed (-110)
  2025-06-29T17:36:20.750990+10:00 AH03 kernel: Bluetooth: hci0: urb 000000000f171e90 failed to resubmit (2)

  Not sure if bluez is right place for this bug, or it needs to go
  somewhere else.. Bluetooth does seem to be working, but the logs are
  awfully chatty.

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: bluez 5.79-2ubuntu1.1
  ProcVersionSignature: Ubuntu 6.14.0-22.22-generic 6.14.5
  Uname: Linux 6.14.0-22-generic x86_64
  ApportVersion: 2.32.0-0ubuntu5.2
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Jun 29 18:38:26 2025
  InstallationDate: Installed on 2023-11-25 (582 days ago)
  InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-22-generic root=UUID=e7ed7850-c7b5-48e9-aa48-4995fc8fbfc4 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7
  SourcePackage: bluez
  UpgradeStatus: Upgraded to plucky on 2025-05-23 (37 days ago)
  dmi.bios.date: 08/08/2018
  dmi.bios.release: 4.6
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.61
  dmi.board.name: Z97 Pro4
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.61:bd08/08/2018:br4.6:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ97Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.sku: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  hciconfig:
   hci0:	Type: Primary  Bus: USB
   	BD Address: 08:BF:B8:4A:A3:8E  ACL MTU: 1021:6  SCO MTU: 255:12
   	UP RUNNING PSCAN 
   	RX bytes:1676 acl:0 sco:0 events:185 errors:0
   	TX bytes:33907 acl:0 sco:0 commands:185 errors:0
  rfkill:
   1621: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no

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Follow ups

[Bug 2115588] Re: Seeing repeated error in dmesg / kernel log for USB BT dongle
From: Daniel van Vugt, 2025-06-30
[Bug 2115588] Re: Seeing repeated error in dmesg / kernel log for USB BT dongle
From: Ricardo Nava, 2025-06-29