Eu continuei usando o kernel 3.13.0-45-genérico por alguns dias. Nesse meio tempo, novas atualizações do kernel foram baixadas pelo Software Updater e isso resolveu o problema.
Eu tenho usado o Ubuntu 14.04 há algum tempo, mas uma coisa estranha aconteceu ontem. Meu laptop não detecta conexões wifi ou LAN. Eu fiz alguma pesquisa e executei alguns comandos. Aqui estão os comandos e saídas:
sudo lshw -C network output:
*-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-c141ffff
lspci -nnk | grep -iA2 net output:
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 output:
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]
Tudo funciona bem quando eu inicio o kernel 3.13.0-45-generic. Eu faço isso selecionando-o em Opções avançadas no menu GRUB. Mas quando eu inicializo em 3.13.0-46-genérico (mais recente que eu tenho), o problema volta.
Eu continuei usando o kernel 3.13.0-45-genérico por alguns dias. Nesse meio tempo, novas atualizações do kernel foram baixadas pelo Software Updater e isso resolveu o problema.
Tags networking 14.04