Posted on Bugzilla per @ArtemS.Tashkinov 's advice
On my HP notebook, when running Linux, the Bluetooth adapter disappears after sleep (always), and reappears after rebooting (also always), so I'd imagine the solution might involve doing whatever happens to Bluetooth at boot. This happens on both Ubuntu and Fedora, but not Windows. I'm currently using Fedora, so if the solution is distro-specific, it needs to fit that.
I've tried updating bluez, using modprobe, restarting bluetooth.service, none worked.
Specs:
HP Notebook 15-dy1751ms (more)
Fedora 37 on Linux 6.2.7-200.fc37.x86_64
Realtek RTL8821CE 802.11b/g/n/ac (1x1) Wi-Fi and Bluetooth 4.2 Combo
The following 2 are from when Bluetooth is working (after boot before sleep). When Bluetooth is not working, it doesn't show in either:
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04f3:2753 Elan Microelectronics Corp. Touchscreen
Bus 001 Device 003: ID 0408:5365 Quanta Computer, Inc. HP TrueVision HD Camera
Bus 001 Device 005: ID 0bda:b00a Realtek Semiconductor Corp. Realtek Bluetooth 4.2 Adapter
Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
lspci -vvv shows the same whether Bluetooth is working or not, except for one line, after it breaks (sleep),
DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend-
becomes
DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend-
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter
DeviceName: Realtek Wireless LAN + BT
Subsystem: Hewlett-Packard Company Device 831a
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 138
Region 0: I/O ports at 3000 [size=256]
Region 2: Memory at 80500000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
Address: 00000000fee00458 Data: 0000
Capabilities: [70] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <4us, L1 <64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 10W
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <2us, L1 <64us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp-
LnkCtl: ASPM L1 Enabled; RCB 64 bytes, Disabled- CommClk+
ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1
TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Not Supported, TimeoutDis+ NROPrPrP- LTR+
10BitTagComp- 10BitTagReq- OBFF Via message/WAKE#, ExtFmt- EETLPPrefix-
EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
FRS- TPHComp- ExtTPHComp-
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis+ LTR+ 10BitTagReq- OBFF Disabled,
AtomicOpsCtl: ReqEn-
LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-
LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot
LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- EqualizationPhase1-
EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Capabilities: [100 v2] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr+ BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
Capabilities: [148 v1] Device Serial Number 00-e0-4c-ff-fe-c8-21-01
Capabilities: [158 v1] Latency Tolerance Reporting
Max snoop latency: 3145728ns
Max no snoop latency: 3145728ns
Capabilities: [160 v1] L1 PM Substates
L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1- L1_PM_Substates-
L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
L1SubCtl2:
Capabilities: [170 v1] Precision Time Measurement
PTMCap: Requester:- Responder:+ Root:-
PTMClockGranularity: Unimplemented
PTMControl: Enabled:+ RootSelected:-
PTMEffectiveGranularity: Unknown
Capabilities: [17c v1] Vendor Specific Information: ID=0003 Rev=1 Len=054 <?>
Kernel driver in use: rtw_8821ce
Kernel modules: rtw88_8821ce
dmesg:
$ dmesg | grep -i blue
[ 2.142933] usb 1-10: Product: Bluetooth Radio
[ 17.314811] Bluetooth: Core ver 2.22
[ 17.314847] NET: Registered PF_BLUETOOTH protocol family
[ 17.314849] Bluetooth: HCI device and connection manager initialized
[ 17.314854] Bluetooth: HCI socket layer initialized
[ 17.314857] Bluetooth: L2CAP socket layer initialized
[ 17.314866] Bluetooth: SCO socket layer initialized
[ 17.432626] Bluetooth: hci0: RTL: examining hci_ver=08 hci_rev=000c lmp_ver=08 lmp_subver=8821
[ 17.433613] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 17.433618] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_fw.bin
[ 17.441377] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_config.bin
[ 17.442234] Bluetooth: hci0: RTL: cfg_sz 10, total sz 34926
[ 17.940640] Bluetooth: hci0: RTL: fw version 0x75b8f098
[ 18.531332] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 18.531338] Bluetooth: BNEP filters: protocol multicast
[ 18.531344] Bluetooth: BNEP socket layer initialized
[ 18.533915] Bluetooth: MGMT ver 1.22
[ 45.633522] Bluetooth: RFCOMM TTY layer initialized
[ 45.633530] Bluetooth: RFCOMM socket layer initialized
[ 45.633536] Bluetooth: RFCOMM ver 1.11
sudo lspci -vvv(when the device is visible) anddmesgoutput (after resume) to the bug report.