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I have a problem with my Dell Inspiron 15 5000, which is the bluetooth is not detected for some reason. I can't switch on the bluetooth. Actually my problem is similar with this case: https://unix.stackexchange.com/questions/490047/bluetooth-not-working-on-dell-laptop and Bluetooth not detected in Ubuntu 20.04 LTS on Dell Inspiron 1720

Previously, my bluetooth worked well. But, for some while this problem is happening again & again, and I just restart my laptop and it works again. But now, it doesn't work even though I restart my laptop.

screenshot

➜  ~ rfkill 
ID TYPE DEVICE      SOFT      HARD
 0 wlan phy0   unblocked unblocked

also check with bluetoothctl;

➜  ~ bluetoothctl
Agent registered
[bluetooth]# power on
No default controller available

and then;

➜  ~ dmesg | grep -i 'firmware\|blue'
[    0.149493] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    6.262277] dell_wmi: firmware scancode 0x48 maps to unrecognized keycode 0xffff
[    6.262278] dell_wmi: firmware scancode 0x50 maps to unrecognized keycode 0xffff
[    6.459574] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/icl_dmc_ver1_09.bin (v1.9)
[    6.537118] [Firmware Bug]: ACPI(PXSX) defines _DOD but not _DOS
[    6.740110] ath10k_pci 0000:03:00.0: firmware ver WLAN.TF.2.1-00021-QCARMSWP-1 api 6 features wowlan,ignore-otp crc32 42e41877
[10844.973418] Bluetooth: Core ver 2.22
[10844.973444] Bluetooth: HCI device and connection manager initialized
[10844.973447] Bluetooth: HCI socket layer initialized
[10844.973449] Bluetooth: L2CAP socket layer initialized
[10844.973451] Bluetooth: SCO socket layer initialized
[10916.088299] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[10916.088300] Bluetooth: BNEP filters: protocol multicast
[10916.088303] Bluetooth: BNEP socket layer initialized
[11331.091588] Modules linked in: bnep btusb btrtl btbcm btintel bluetooth ecdh_generic ecc xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c bpfilter br_netfilter bridge stp llc ccm aufs overlay nls_iso8859_1 snd_hda_codec_hdmi snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_intel_hda_common snd_hda_codec_realtek snd_soc_hdac_hda snd_sof_xtensa_dsp snd_sof_intel_hda snd_hda_codec_generic snd_sof snd_hda_ext_core snd_soc_acpi_intel_match x86_pkg_temp_thermal snd_soc_acpi snd_soc_core intel_powerclamp coretemp snd_compress ac97_bus snd_pcm_dmaengine kvm_intel snd_hda_intel kvm snd_intel_dspcfg snd_hda_codec nouveau snd_hda_core uvcvideo snd_hwdep snd_pcm ath10k_pci i915 videobuf2_vmalloc videobuf2_memops snd_seq_midi ath10k_core videobuf2_v4l2 crct10dif_pclmul snd_seq_midi_event mxm_wmi ghash_clmulni_intel aesni_intel ttm snd_rawmidi videobuf2_common ath
➜  ~ lspci -knn | grep Net -A2
03:00.0 Network controller [0280]: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter [168c:0042] (rev 31)
    Subsystem: Dell QCA9377 802.11ac Wireless Network Adapter [1028:1810]
    Kernel driver in use: ath10k_pci
    Kernel modules: ath10k_pci

and my lsusb;

➜  ~ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0c45:671e Microdia Integrated_Webcam_HD
Bus 001 Device 003: ID 27c6:538d Shenzhen Goodix Technology Co.,Ltd. FingerPrint
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Someone suggested to following this commands, but I'm not sure it working for Dell Inspiron 15 5000, which is it mentioned for XPS version.

sudo add-apt-repository ppa:canonical-kernel-team/ppa
sudo apt-get update
sudo apt-get install linux-oem-osp1 

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