我已经使用 Ubuntu 14.04 有一段时间了，但昨天发生了一件奇怪的事情。我的笔记本电脑无法检测到 wifi 或 LAN 连接。我进行了一些搜索并运行了一些命令。以下是命令和输出：
sudo lshw -C network输出：*-network UNCLAIMED description: Network controller product: AR9285 Wireless Network Adapter (PCI-Express) vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:02:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:c3400000-c340ffff *-network UNCLAIMED description: Ethernet controller product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 version: 03 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list configuration: latency=0 resources: ioport:2000(size=256) memory:c1404000-c1404fff memory:c1400000-c1403fff memory:c1410000-c141fffflspci -nnk | grep -iA2 net输出：02:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01) Subsystem: Hewlett-Packard Company U98Z062.12 802.11bgn Wireless Half-size Mini PCIe Card [103c:3040] 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 03) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:00.0 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers [8086:2c62] (rev 02)lspci -nnk输出：00:00.0 Host bridge [0600]: Intel Corporation Core Processor DRAM Controller [8086:0044] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] Kernel driver in use: agpgart-intel 00:01.0 PCI bridge [0604]: Intel Corporation Core Processor PCI Express x16 Root Port [8086:0045] (rev 02) Kernel driver in use: pcieport 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] 00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller [8086:3b64] (rev 06) Subsystem: Hewlett-Packard Company Device [103c:144a] 00:1a.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b3c] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] Kernel driver in use: ehci-pci 00:1b.0 Audio device [0403]: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio [8086:3b56] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] 00:1c.0 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 [8086:3b42] (rev 05) Kernel driver in use: pcieport 00:1c.1 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 [8086:3b44] (rev 05) Kernel driver in use: pcieport 00:1d.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b34] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] Kernel driver in use: ehci-pci 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev a5) 00:1f.0 ISA bridge [0601]: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller [8086:3b09] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] 00:1f.2 SATA controller [0106]: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller [8086:3b29] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] Kernel driver in use: ahci 00:1f.3 SMBus [0c05]: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller [8086:3b30] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] 00:1f.6 Signal processing controller [1180]: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem [8086:3b32] (rev 05) Subsystem: Hewlett-Packard Company Device [103c:144a] 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Madison [Mobility Radeon HD 5650/5750 / 6530M/6550M] [1002:68c1] Subsystem: Hewlett-Packard Company Mobility Radeon HD 5650 [103c:144a] 01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Redwood HDMI Audio [Radeon HD 5000 Series] [1002:aa60] Subsystem: Hewlett-Packard Company Device [103c:144a] 02:00.0 Network controller [0280]: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01) Subsystem: Hewlett-Packard Company U98Z062.12 802.11bgn Wireless Half-size Mini PCIe Card [103c:3040] 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 03) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:00.0 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers [8086:2c62] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:00.1 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture System Address Decoder [8086:2d01] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:02.0 Host bridge [0600]: Intel Corporation Core Processor QPI Link 0 [8086:2d10] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:02.1 Host bridge [0600]: Intel Corporation Core Processor QPI Physical 0 [8086:2d11] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:02.2 Host bridge [0600]: Intel Corporation Core Processor Reserved [8086:2d12] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a] 7f:02.3 Host bridge [0600]: Intel Corporation Core Processor Reserved [8086:2d13] (rev 02) Subsystem: Hewlett-Packard Company Device [103c:144a]
当我启动 3.13.0-45-generic 内核时，一切正常。我通过从中选择它来实现这一点高级选项从 GRUB 菜单。但是当我启动到 3.13.0-46-generic（我拥有的最新版本）时，问题又出现了。
答案1
几天来我一直使用 3.13.0-45-generic 内核。在此期间，Software Updater 下载了新的内核更新，这解决了问题。