alex55
January 7, 2026, 11:59am
1
Hello,
After I installed updates last December, kde looses bluetooth adapter in a few hours of work. It always happens after the system locked the screen and turned it off because of inactivity.
If I forcely turn off screen locking, everything works fine for days.
Before the december updates were installed, bluetooth on my laptop had been working for a couple of years without any issues.
I have installed the latest updates yesterday, it solved the problem with hanging up the laptop on turning off display, but bluetooth issues still here.
alex55
January 7, 2026, 12:17pm
2
$ sudo dmesg | grep -i blue
[ 35.817223] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
[ 35.849429] Bluetooth: Core ver 2.22
[ 35.849459] NET: Registered PF_BLUETOOTH protocol family
[ 35.849461] Bluetooth: HCI device and connection manager initialized
[ 35.849464] Bluetooth: HCI socket layer initialized
[ 35.849467] Bluetooth: L2CAP socket layer initialized
[ 35.849471] Bluetooth: SCO socket layer initialized
[ 35.984333] Bluetooth: hci0: Device revision is 0
[ 35.984339] Bluetooth: hci0: Secure boot is enabled
[ 35.984341] Bluetooth: hci0: OTP lock is enabled
[ 35.984342] Bluetooth: hci0: API lock is enabled
[ 35.984343] Bluetooth: hci0: Debug lock is disabled
[ 35.984344] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 35.984346] Bluetooth: hci0: Bootloader timestamp 2019.40 buildtype 1 build 38
[ 35.986364] Bluetooth: hci0: DSM reset method type: 0x00
[ 35.992826] Bluetooth: hci0: Found device firmware: intel/ibt-0040-0041.sfi
[ 35.992849] Bluetooth: hci0: Boot Address: 0x100800
[ 35.992851] Bluetooth: hci0: Firmware Version: 60-48.23
[ 36.965120] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 36.965125] Bluetooth: BNEP filters: protocol multicast
[ 36.965129] Bluetooth: BNEP socket layer initialized
[ 37.530740] Bluetooth: hci0: Waiting for firmware download to complete
[ 37.531333] Bluetooth: hci0: Firmware loaded in 1502442 usecs
[ 37.531423] Bluetooth: hci0: Waiting for device to boot
[ 37.547424] Bluetooth: hci0: Device booted in 15676 usecs
[ 37.549710] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0040-0041.ddc
[ 37.551337] Bluetooth: hci0: Applying Intel DDC parameters completed
[ 37.554421] Bluetooth: hci0: Firmware timestamp 2023.48 buildtype 1 build 75324
[ 37.554425] Bluetooth: hci0: Firmware SHA1: 0x23bac558
[ 37.558332] Bluetooth: hci0: Fseq status: Success (0x00)
[ 37.558342] Bluetooth: hci0: Fseq executed: 00.00.02.41
[ 37.558344] Bluetooth: hci0: Fseq BT Top: 00.00.02.41
[ 37.629496] Bluetooth: MGMT ver 1.23
[ 39.767165] Bluetooth: RFCOMM TTY layer initialized
[ 39.767175] Bluetooth: RFCOMM socket layer initialized
[ 39.767181] Bluetooth: RFCOMM ver 1.11
[13549.869744] Bluetooth: hci0: Received unexpected HCI Event 0x00
[13549.869763] Bluetooth: hci0: Received unexpected HCI Event 0x00
<lots of repeated messages removed>
[13549.870048] Bluetooth: hci0: Received unexpected HCI Event 0x00
[13556.642269] Bluetooth: hci0: Opcode 0x0402 failed: -110
[13556.642336] Bluetooth: hci0: command 0x0402 tx timeout
[13556.642347] Bluetooth: hci0: Initiating acpi reset method
[13557.327608] Bluetooth: hci0: Device revision is 0
[13557.327618] Bluetooth: hci0: Secure boot is enabled
[13557.327620] Bluetooth: hci0: OTP lock is enabled
[13557.327622] Bluetooth: hci0: API lock is enabled
[13557.327624] Bluetooth: hci0: Debug lock is disabled
[13557.327626] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[13557.327629] Bluetooth: hci0: Bootloader timestamp 2019.40 buildtype 1 build 38
[13557.328063] Bluetooth: hci0: DSM reset method type: 0x00
[13557.333164] Bluetooth: hci0: Found device firmware: intel/ibt-0040-0041.sfi
[13557.333199] Bluetooth: hci0: Boot Address: 0x100800
[13557.333202] Bluetooth: hci0: Firmware Version: 60-48.23
[13558.861547] Bluetooth: hci0: Waiting for firmware download to complete
[13558.861563] Bluetooth: hci0: Firmware loaded in 1492613 usecs
[13558.861744] Bluetooth: hci0: Waiting for device to boot
[13558.878763] Bluetooth: hci0: Device booted in 16724 usecs
[13558.881020] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0040-0041.ddc
[13558.882794] Bluetooth: hci0: Applying Intel DDC parameters completed
[13558.885610] Bluetooth: hci0: Firmware timestamp 2023.48 buildtype 1 build 75324
[13558.885629] Bluetooth: hci0: Firmware SHA1: 0x23bac558
[13558.889665] Bluetooth: hci0: Fseq status: Success (0x00)
[13558.889683] Bluetooth: hci0: Fseq executed: 00.00.02.41
[13558.889688] Bluetooth: hci0: Fseq BT Top: 00.00.02.41
[13558.961008] Bluetooth: MGMT ver 1.23
[49855.577151] Bluetooth: hci0: Opcode 0x0402 failed: -110
[49855.577157] Bluetooth: hci0: command 0x0402 tx timeout
[49855.577186] Bluetooth: hci0: Initiating acpi reset method
[49856.262661] Bluetooth: hci0: Device revision is 0
[49856.262675] Bluetooth: hci0: Secure boot is enabled
[49856.262679] Bluetooth: hci0: OTP lock is enabled
[49856.262681] Bluetooth: hci0: API lock is enabled
[49856.262684] Bluetooth: hci0: Debug lock is disabled
[49856.262686] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[49856.262691] Bluetooth: hci0: Bootloader timestamp 2019.40 buildtype 1 build 38
[49856.263306] Bluetooth: hci0: DSM reset method type: 0x00
[49856.270213] Bluetooth: hci0: Found device firmware: intel/ibt-0040-0041.sfi
[49856.270267] Bluetooth: hci0: Boot Address: 0x100800
[49856.270271] Bluetooth: hci0: Firmware Version: 60-48.23
[49857.805033] Bluetooth: hci0: Waiting for firmware download to complete
[49857.805053] Bluetooth: hci0: Firmware loaded in 1498896 usecs
[49857.805353] Bluetooth: hci0: Waiting for device to boot
[49857.821842] Bluetooth: hci0: Device booted in 16291 usecs
[49857.823912] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0040-0041.ddc
[49857.825610] Bluetooth: hci0: Applying Intel DDC parameters completed
[49857.828641] Bluetooth: hci0: Firmware timestamp 2023.48 buildtype 1 build 75324
[49857.828649] Bluetooth: hci0: Firmware SHA1: 0x23bac558
[49857.832653] Bluetooth: hci0: Fseq status: Success (0x00)
[49857.832669] Bluetooth: hci0: Fseq executed: 00.00.02.41
[49857.832675] Bluetooth: hci0: Fseq BT Top: 00.00.02.41
[49857.904276] Bluetooth: MGMT ver 1.23
[64036.303292] Bluetooth: hci0: Received unexpected HCI Event 0x00
<lots of repeated messages removed>
[64042.069329] Bluetooth: hci0: Received unexpected HCI Event 0x00
[64075.225626] Bluetooth: hci0: command 0x0402 tx timeout
[64075.225650] Bluetooth: hci0: Initiating acpi reset method
[64075.225649] Bluetooth: hci0: Opcode 0x0402 failed: -110
[64075.911179] Bluetooth: hci0: Device revision is 0
[64075.911191] Bluetooth: hci0: Secure boot is enabled
[64075.911194] Bluetooth: hci0: OTP lock is enabled
[64075.911196] Bluetooth: hci0: API lock is enabled
[64075.911198] Bluetooth: hci0: Debug lock is disabled
[64075.911200] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[64075.911204] Bluetooth: hci0: Bootloader timestamp 2019.40 buildtype 1 build 38
[64075.911668] Bluetooth: hci0: DSM reset method type: 0x00
[64075.915533] Bluetooth: hci0: Found device firmware: intel/ibt-0040-0041.sfi
[64075.915544] Bluetooth: hci0: Boot Address: 0x100800
[64075.915545] Bluetooth: hci0: Firmware Version: 60-48.23
[64077.448379] Bluetooth: hci0: Waiting for firmware download to complete
[64077.449043] Bluetooth: hci0: Firmware loaded in 1497654 usecs
[64077.449381] Bluetooth: hci0: Waiting for device to boot
[64077.466247] Bluetooth: hci0: Device booted in 16701 usecs
[64077.468598] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0040-0041.ddc
[64077.471258] Bluetooth: hci0: Applying Intel DDC parameters completed
[64077.474231] Bluetooth: hci0: Firmware timestamp 2023.48 buildtype 1 build 75324
[64077.474247] Bluetooth: hci0: Firmware SHA1: 0x23bac558
[64077.478227] Bluetooth: hci0: Fseq status: Success (0x00)
[64077.478237] Bluetooth: hci0: Fseq executed: 00.00.02.41
[64077.478242] Bluetooth: hci0: Fseq BT Top: 00.00.02.41
[64077.550326] Bluetooth: MGMT ver 1.23
[68026.989473] Bluetooth: hci0: Received unexpected HCI Event 0x00
<lots of repeated messages removed>
[68029.043108] Bluetooth: hci0: Received unexpected HCI Event 0x00
[68035.096460] Bluetooth: hci0: command 0x0402 tx timeout
[68035.096460] Bluetooth: hci0: Opcode 0x0402 failed: -110
[68035.096479] Bluetooth: hci0: Initiating acpi reset method
alex55
January 22, 2026, 4:34pm
3
Updated KDE to 6.5.5 and the problem has not appeared since that.
