这台特定的笔记本电脑（戴尔 Inspiron 1420）前面肯定有一个蓝牙灯。
如何检测笔记本电脑的内置蓝牙？
nicholas@gondor:~$
nicholas@gondor:~$ sudo dmesg | grep -i blue
nicholas@gondor:~$
nicholas@gondor:~$ sudo lsusb | grep -i blue
nicholas@gondor:~$
nicholas@gondor:~$ sudo lshw
gondor
description: Portable Computer
product: Inspiron 1420
vendor: Dell Inc.
serial: 2HX3ZH1
width: 64 bits
capabilities: smbios-2.4 dmi-2.4 smp vsyscall32
configuration: boot=normal chassis=portable uuid=44454C4C-4800-1058-8033-B2C04F5A4831
*-core
description: Motherboard
product: 0DT492
vendor: Dell Inc.
physical id: 0
serial: .2HX3ZH1.CN787838AO01R5.
*-firmware
description: BIOS
vendor: Dell Inc.
physical id: 0
version: A10
date: 12/19/2008
size: 64KiB
capacity: 1MiB
capabilities: isa pci pcmcia pnp upgrade shadowing cdboot bootselect int13floppy720 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp smartbattery biosbootspecification netboot
*-cpu
description: CPU
product: Intel(R) Pentium(R) Dual CPU T2390 @ 1.86GHz
vendor: Intel Corp.
physical id: 400
bus info: cpu@0
slot: Microprocessor
size: 1471MHz
capacity: 1867MHz
width: 64 bits
clock: 133MHz
capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ht tm pbe syscall nx x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl cpuid aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm pti dtherm cpufreq
configuration: cores=2 enabledcores=2 threads=2
*-cache:0
description: L1 cache
physical id: 700
size: 32KiB
capacity: 32KiB
capabilities: internal write-back data
configuration: level=1
*-cache:1
description: L2 cache
physical id: 701
size: 1MiB
capacity: 1MiB
clock: 66MHz (15.0ns)
capabilities: pipeline-burst internal varies unified
configuration: level=2
*-memory
description: System Memory
physical id: 1000
slot: System board or motherboard
size: 2GiB
*-bank:0
description: DIMM DDR Synchronous 667 MHz (1.5 ns)
product: HYMP512S64CP8-Y5
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 0
serial: 00007277
slot: DIMM_A
size: 1GiB
width: 64 bits
clock: 667MHz (1.5ns)
*-bank:1
description: DIMM DDR Synchronous 667 MHz (1.5 ns)
product: HYMP512S64CP8-Y5
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 1
serial: 0000303C
slot: DIMM_B
size: 1GiB
width: 64 bits
clock: 667MHz (1.5ns)
*-pci
description: Host bridge
product: Mobile PM965/GM965/GL960 Memory Controller Hub
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 0c
width: 32 bits
clock: 33MHz
*-display:0
description: VGA compatible controller
product: Mobile GM965/GL960 Integrated Graphics Controller (primary)
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0c
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:16 memory:fea00000-feafffff memory:e0000000-efffffff ioport:eff8(size=8) memory:c0000-dffff
*-display:1 UNCLAIMED
description: Display controller
product: Mobile GM965/GL960 Integrated Graphics Controller (secondary)
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 0c
width: 64 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: latency=0
resources: memory:feb00000-febfffff
*-usb:0
description: USB controller
product: 82801H (ICH8 Family) USB UHCI Controller #4
vendor: Intel Corporation
physical id: 1a
bus info: pci@0000:00:1a.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:20 ioport:6f20(size=32)
*-usbhost
product: UHCI Host Controller
vendor: Linux 5.8.0-25-generic uhci_hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 5.08
capabilities: usb-1.10
configuration: driver=hub slots=2 speed=12Mbit/s
*-usb:1
description: USB controller
product: 82801H (ICH8 Family) USB UHCI Controller #5
vendor: Intel Corporation
physical id: 1a.1
bus info: pci@0000:00:1a.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:21 ioport:6f00(size=32)
*-usbhost
product: UHCI Host Controller
vendor: Linux 5.8.0-25-generic uhci_hcd
physical id: 1
bus info: usb@4
logical name: usb4
version: 5.08
capabilities: usb-1.10
configuration: driver=hub slots=2 speed=12Mbit/s
*-usb:2
description: USB controller
product: 82801H (ICH8 Family) USB2 EHCI Controller #2
vendor: Intel Corporation
physical id: 1a.7
bus info: pci@0000:00:1a.7
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:22 memory:fed1c400-fed1c7ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 5.8.0-25-generic ehci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 5.08
capabilities: usb-2.00
configuration: driver=hub slots=4 speed=480Mbit/s
*-multimedia
description: Audio device
product: 82801H (ICH8 Family) HD Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:29 memory:fe9fc000-fe9fffff
*-pci:0
description: PCI bridge
product: 82801H (ICH8 Family) PCI Express Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:2000(size=4096) memory:80000000-801fffff ioport:80200000(size=2097152)
*-pci:1
description: PCI bridge
product: 82801H (ICH8 Family) PCI Express Port 2
vendor: Intel Corporation
physical id: 1c.1
bus info: pci@0000:00:1c.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:25 ioport:3000(size=4096) memory:fe800000-fe8fffff ioport:80400000(size=2097152)
*-network
description: Wireless interface
product: PRO/Wireless 3945ABG [Golan] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0c:00.0
logical name: wlp12s0
version: 02
serial: 00:1f:3c:cd:e6:ad
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl3945 driverversion=5.8.0-25-generic firmware=15.32.2.9 ip=192.168.1.13 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:30 memory:fe8ff000-fe8fffff
*-pci:2
description: PCI bridge
product: 82801H (ICH8 Family) PCI Express Port 4
vendor: Intel Corporation
physical id: 1c.3
bus info: pci@0000:00:1c.3
version: 02
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:26 ioport:d000(size=4096) memory:fe600000-fe7fffff ioport:f0000000(size=2097152)
*-pci:3
description: PCI bridge
product: 82801H (ICH8 Family) PCI Express Port 6
vendor: Intel Corporation
physical id: 1c.5
bus info: pci@0000:00:1c.5
version: 02
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:27 ioport:4000(size=4096) memory:fe500000-fe5fffff ioport:80600000(size=2097152)
*-network
description: Ethernet interface
product: NetLink BCM5906M Fast Ethernet PCI Express
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:09:00.0
logical name: enp9s0
version: 02
serial: 00:22:19:d1:9c:0b
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=5.8.0-25-generic firmware=sb v3.04 latency=0 link=no multicast=yes port=twisted pair
resources: irq:31 memory:fe5f0000-fe5fffff
*-usb:3
description: USB controller
product: 82801H (ICH8 Family) USB UHCI Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:20 ioport:6f80(size=32)
*-usbhost
product: UHCI Host Controller
vendor: Linux 5.8.0-25-generic uhci_hcd
physical id: 1
bus info: usb@5
logical name: usb5
version: 5.08
capabilities: usb-1.10
configuration: driver=hub slots=2 speed=12Mbit/s
*-usb:4
description: USB controller
product: 82801H (ICH8 Family) USB UHCI Controller #2
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@0000:00:1d.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:21 ioport:6f60(size=32)
*-usbhost
product: UHCI Host Controller
vendor: Linux 5.8.0-25-generic uhci_hcd
physical id: 1
bus info: usb@6
logical name: usb6
version: 5.08
capabilities: usb-1.10
configuration: driver=hub slots=2 speed=12Mbit/s
*-usb:5
description: USB controller
product: 82801H (ICH8 Family) USB UHCI Controller #3
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: 02
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:22 ioport:6f40(size=32)
*-usbhost
product: UHCI Host Controller
vendor: Linux 5.8.0-25-generic uhci_hcd
physical id: 1
bus info: usb@7
logical name: usb7
version: 5.08
capabilities: usb-1.10
configuration: driver=hub slots=2 speed=12Mbit/s
*-usb:6
description: USB controller
product: 82801H (ICH8 Family) USB2 EHCI Controller #1
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@0000:00:1d.7
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:20 memory:fed1c000-fed1c3ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 5.8.0-25-generic ehci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 5.08
capabilities: usb-2.00
configuration: driver=hub slots=6 speed=480Mbit/s
*-pci:4
description: PCI bridge
product: 82801 Mobile PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: f2
width: 32 bits
clock: 33MHz
capabilities: pci subtractive_decode bus_master cap_list
resources: memory:fe400000-fe4fffff
*-firewire
description: FireWire (IEEE 1394)
product: R5C832 IEEE 1394 Controller
vendor: Ricoh Co Ltd
physical id: 1
bus info: pci@0000:03:01.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: pm ohci bus_master cap_list
configuration: driver=firewire_ohci latency=64 maxlatency=4 mingnt=2
resources: irq:19 memory:fe4ff800-fe4fffff
*-generic:0
description: SD Host controller
product: R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter
vendor: Ricoh Co Ltd
physical id: 1.1
bus info: pci@0000:03:01.1
version: 22
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=sdhci-pci latency=64
resources: irq:18 memory:fe4ff500-fe4ff5ff
*-generic:1
description: System peripheral
product: R5C592 Memory Stick Bus Host Adapter
vendor: Ricoh Co Ltd
physical id: 1.2
bus info: pci@0000:03:01.2
version: 12
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=r592 latency=64
resources: irq:18 memory:fe4ff600-fe4ff6ff
*-generic:2
description: System peripheral
product: xD-Picture Card Controller
vendor: Ricoh Co Ltd
physical id: 1.3
bus info: pci@0000:03:01.3
version: 12
width: 32 bits
clock: 33MHz
capabilities: pm cap_list
configuration: driver=r852 latency=0
resources: irq:18 memory:fe4ff700-fe4ff7ff
*-isa
description: ISA bridge
product: 82801HM (ICH8M) LPC Interface Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: driver=lpc_ich latency=0
resources: irq:0
*-ide
description: IDE interface
product: 82801HM/HEM (ICH8M/ICH8M-E) IDE Controller
vendor: Intel Corporation
physical id: 1f.1
bus info: pci@0000:00:1f.1
logical name: scsi0
version: 02
width: 32 bits
clock: 33MHz
capabilities: ide isa_compat_mode pci_native_mode bus_master emulated
configuration: driver=ata_piix latency=0
resources: irq:16 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:6fa0(size=16)
*-cdrom
description: DVD reader
product: CDRW/DVD GCCT10N
vendor: HL-DT-ST
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/sr0
version: A100
capabilities: removable audio cd-r cd-rw dvd
configuration: ansiversion=5 status=nodisc
*-sata
description: SATA controller
product: 82801HM/HEM (ICH8M/ICH8M-E) SATA Controller [AHCI mode]
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
logical name: scsi2
version: 02
width: 32 bits
clock: 66MHz
capabilities: sata msi pm ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=0
resources: irq:28 ioport:6eb0(size=8) ioport:6eb8(size=4) ioport:6ec0(size=8) ioport:6ec8(size=4) ioport:6ee0(size=32) memory:fe9fb800-fe9fbfff
*-disk
description: ATA Disk
product: FUJITSU MHV2080B
vendor: Fujitsu
physical id: 0.0.0
bus info: scsi@2:0.0.0
logical name: /dev/sda
version: 0029
serial: NW99T67292MW
size: 74GiB (80GB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=f071da71-e075-4380-86cb-1d2ca3e090b7 logicalsectorsize=512 sectorsize=512
*-volume:0
description: BIOS Boot partition
vendor: EFI
physical id: 1
bus info: scsi@2:0.0.0,1
logical name: /dev/sda1
serial: cf10a60c-187f-4efe-87f2-2efa242be9c6
capacity: 1023KiB
capabilities: nofs
*-volume:1
description: Windows FAT volume
vendor: mkfs.fat
physical id: 2
bus info: scsi@2:0.0.0,2
logical name: /dev/sda2
logical name: /boot/efi
version: FAT32
serial: 4a30-fc7e
size: 510MiB
capacity: 512MiB
capabilities: boot fat initialized
configuration: FATs=2 filesystem=fat mount.fstype=vfat mount.options=rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro state=mounted
*-volume:2
description: LVM Physical Volume
vendor: Linux
physical id: 3
bus info: scsi@2:0.0.0,3
logical name: /dev/sda3
serial: HjGnzx-MVuO-sNZo-7gEc-Om5k-YTmj-LfMp84
size: 74GiB
capabilities: multi lvm2
*-serial
description: SMBus
product: 82801H (ICH8 Family) SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 02
width: 32 bits
clock: 33MHz
configuration: driver=i801_smbus latency=0
resources: irq:17 memory:fe9fb700-fe9fb7ff ioport:10c0(size=32)
*-pnp00:00
product: PnP device PNP0f13
physical id: 1
capabilities: pnp
configuration: driver=i8042 aux
*-pnp00:01
product: PnP device PNP0303
physical id: 2
capabilities: pnp
configuration: driver=i8042 kbd
*-pnp00:02
product: PnP device PNP0b00
physical id: 3
capabilities: pnp
configuration: driver=rtc_cmos
*-pnp00:03
product: PnP device PNP0c01
physical id: 4
capabilities: pnp
configuration: driver=system
*-pnp00:04
product: PnP device PNP0103
physical id: 5
capabilities: pnp
configuration: driver=system
*-pnp00:05
product: PnP device PNP0c01
physical id: 6
capabilities: pnp
configuration: driver=system
*-pnp00:06
product: PnP device PNP0c01
physical id: 7
capabilities: pnp
configuration: driver=system
*-pnp00:07
product: PnP device PNP0c01
physical id: 8
capabilities: pnp
configuration: driver=system
*-battery
product: DELL MN1278B
vendor: Panasonic
physical id: 1
slot: Sys. Battery Bay
capacity: 51000mWh
configuration: voltage=11.1V
nicholas@gondor:~$
nicholas@gondor:~$ uname -a
Linux gondor 5.8.0-25-generic #26-Ubuntu SMP Thu Oct 15 10:30:38 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
nicholas@gondor:~$
是的，这是一台旧笔记本电脑。
未检测到蓝牙：
