花了一整晚尝试了网上的所有解决方案，但仍然没有一个奏效。我是 Ubuntu 新手，所以请帮忙！任何想法都值得赞赏！
的结果lspci -nn：
00:00.0 Host bridge [0600]: Intel Corporation 82Q35 Express DRAM Controller [8086:29b0] (rev 02)
00:02.0 VGA compatible controller [0300]: Intel Corporation 82Q35 Express Integrated Graphics Controller [8086:29b2] (rev 02)
00:02.1 Display controller [0380]: Intel Corporation 82Q35 Express Integrated Graphics Controller [8086:29b3] (rev 02)
00:03.0 Communication controller [0780]: Intel Corporation 82Q35 Express MEI Controller [8086:29b4] (rev 02)
00:03.2 IDE interface [0101]: Intel Corporation 82Q35 Express PT IDER Controller [8086:29b6] (rev 02)
00:03.3 Serial controller [0700]: Intel Corporation 82Q35 Express Serial KT Controller [8086:29b7] (rev 02)
00:19.0 Ethernet controller [0200]: Intel Corporation 82566DM-2 Gigabit Network Connection [8086:10bd] (rev 02)
00:1a.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 02)
00:1a.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 02)
00:1a.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 02)
00:1b.0 Audio device [0403]: Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 02)
00:1c.0 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 02)
00:1d.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 02)
00:1d.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 02)
00:1d.2 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 02)
00:1d.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 02)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev 92)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801IO (ICH9DO) LPC Interface Controller [8086:2914] (rev 02)
00:1f.2 IDE interface [0101]: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 4 port SATA Controller [IDE mode] [8086:2920] (rev 02)
00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 02)
00:1f.5 IDE interface [0101]: Intel Corporation 82801I (ICH9 Family) 2 port SATA Controller [IDE mode] [8086:2926] (rev 02)
并lshw返回：
my-computer-1234
description: Computer
width: 64 bits
capabilities: vsyscall32
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 1959MiB
*-cpu
product: Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz
vendor: Intel Corp.
physical id: 1
bus info: cpu@0
size: 2GHz
capacity: 2GHz
width: 64 bits
capabilities: 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 ss ht tm pbe syscall nx x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm tpr_shadow vnmi flexpriority cpufreq
*-pci
description: Host bridge
product: 82Q35 Express DRAM Controller
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 02
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel
resources: irq:0
*-display:0
description: VGA compatible controller
product: 82Q35 Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:43 memory:fea00000-fea7ffff ioport:ec90(size=8) memory:d0000000-dfffffff memory:feb00000-febfffff
*-display:1 UNCLAIMED
description: Display controller
product: 82Q35 Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=0
resources: memory:fea80000-feafffff
*-communication:0
description: Communication controller
product: 82Q35 Express MEI Controller
vendor: Intel Corporation
physical id: 3
bus info: pci@0000:00:03.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=mei latency=0
resources: irq:42 memory:f0000000-f000000f
*-ide:0
description: IDE interface
product: 82Q35 Express PT IDER Controller
vendor: Intel Corporation
physical id: 3.2
bus info: pci@0000:00:03.2
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide bus_master cap_list
configuration: driver=ata_generic latency=0
resources: irq:18 ioport:fe80(size=8) ioport:fe90(size=4) ioport:fea0(size=8) ioport:feb0(size=4) ioport:fef0(size=16)
*-communication:1
description: Serial controller
product: 82Q35 Express Serial KT Controller
vendor: Intel Corporation
physical id: 3.3
bus info: pci@0000:00:03.3
version: 02
width: 32 bits
clock: 66MHz
capabilities: 16550 bus_master cap_list
configuration: driver=serial latency=0
resources: irq:17 ioport:ec98(size=8) memory:fe9da000-fe9dafff
*-network
description: Ethernet interface
product: 82566DM-2 Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eth0
version: 02
serial: 00:1e:4f:e9:01:ed
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.5.1-k duplex=full firmware=1.4-0 ip=192.168.1.84 latency=0 multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:41 memory:fe9e0000-fe9fffff memory:fe9db000-fe9dbfff ioport:ecc0(size=32)
*-usb:0
description: USB controller
product: 82801I (ICH9 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 cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:16 ioport:ff20(size=32)
*-usb:1
description: USB controller
product: 82801I (ICH9 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 cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:17 ioport:ff00(size=32)
*-usb:2
description: USB controller
product: 82801I (ICH9 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: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:22 memory:fe9d9c00-fe9d9fff
*-multimedia
description: Audio device
product: 82801I (ICH9 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: bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:44 memory:fe9dc000-fe9dffff
*-pci:0
description: PCI bridge
product: 82801I (ICH9 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 normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:40 ioport:1000(size=4096) memory:fe800000-fe8fffff ioport:f0100000(size=2097152)
*-usb:3
description: USB controller
product: 82801I (ICH9 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 cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:23 ioport:ff80(size=32)
*-usb:4
description: USB controller
product: 82801I (ICH9 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 cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:17 ioport:ff60(size=32)
*-usb:5
description: USB controller
product: 82801I (ICH9 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 cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:18 ioport:ff40(size=32)
*-usb:6
description: USB controller
product: 82801I (ICH9 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: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:23 memory:ff980800-ff980bff
*-pci:1
description: PCI bridge
product: 82801 PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: 92
width: 32 bits
clock: 33MHz
capabilities: pci subtractive_decode bus_master cap_list
*-isa
description: ISA bridge
product: 82801IO (ICH9DO) 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: latency=0
*-ide:1
description: IDE interface
product: 82801IR/IO/IH (ICH9R/DO/DH) 4 port SATA Controller [IDE mode]
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide bus_master cap_list
configuration: driver=ata_piix latency=0
resources: irq:18 ioport:fe00(size=8) ioport:fe10(size=4) ioport:fe20(size=8) ioport:fe30(size=4) ioport:fec0(size=16) ioport:eca0(size=16)
*-serial
description: SMBus
product: 82801I (ICH9 Family) SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 02
width: 64 bits
clock: 33MHz
configuration: driver=i801_smbus latency=0
resources: irq:18 memory:fe9d9b00-fe9d9bff ioport:ece0(size=32)
*-ide:2
description: IDE interface
product: 82801I (ICH9 Family) 2 port SATA Controller [IDE mode]
vendor: Intel Corporation
physical id: 1f.5
bus info: pci@0000:00:1f.5
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide bus_master cap_list
configuration: driver=ata_piix latency=0
resources: irq:18 ioport:fe40(size=8) ioport:fe50(size=4) ioport:fe60(size=8) ioport:fe70(size=4) ioport:fed0(size=16) ioport:ecb0(size=16)
并且rfkill list all不返回任何内容
并iwconfig返回：
lo no wireless extensions.
eth0 no wireless extensions.
更新：
结果为lsusb：
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 413c:2107 Dell Computer Corp.
Bus 006 Device 002: ID 062a:0000 Creative Labs Optical mouse
我之前有一个 Netgear WNDA3100 USB 适配器，但我只在 Windows 上使用过它。所以如果这台电脑需要 USB 适配器才能连接无线，我还能使用它吗？
最后但同样重要的是，感谢大家的意见！很抱歉，由于工作原因，我无法及时更新我的问题，但我会尽力尽快回复。
答案1
可能是您的 ubuntu 初始驱动程序无法正常工作，因此您需要更新驱动程序才能在 ubuntu 中使用 wifi。首先，您需要使用“电缆”连接您的 PC/笔记本电脑，然后它会自动检测您的互联网连接。
打开“附加驱动程序”选项，它将搜索您的电脑和卡所需的驱动程序。
之后会显示一个驱动程序列表，在这里您可以根据制造公司选择驱动程序，Broadcom STA 无线驱动程序可与所有卡一起正常工作。
您可以更新驱动程序，然后重新启动电脑，拔下电缆，现在您可以搜索您的 wifi 并输入连接密码。
您可以找到该包 -
sudo lspci
sudo dpkg --get-selections