我的问题几乎重复了https://askubuntu.com/questions/112411/wireless-security-wpa-wpa2-passwords-not-accepted-wireless-security-none但那里没有合适的答案，我找不到评论的方法，所以又来了。
我有一台三星 NC20。我使用 Natty 有一段时间了，无线功能一切正常。升级到 Oneiric 后，我无法再连接到受保护的网络。网络被检测到，但当我尝试连接时，网络管理器只是不断尝试，直到超时，我想。不安全的网络工作正常。我使用不安全的网络升级到 Precise，但问题仍然存在。
我尝试在本网站和其他地方查找此问题的解决方案，但找不到任何有效的方法。我按照一些人的建议尝试了 WICD 而不是网络管理器：同样的问题。我安装了兼容的无线设备，linux-backports-modules-cw-3.3-precise-generic但这也无济于事。
你可以想象这真的很烦人，我真的需要一些帮助。
提前致谢！
PS——以下是一些可能相关的命令的输出：
$ lspci -v
00:00.0 Host bridge: VIA Technologies, Inc. VX800 Host Bridge (rev 12)
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32
00:00.1 Host bridge: VIA Technologies, Inc. VX800/VX820 Error Reporting
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 0
00:00.2 Host bridge: VIA Technologies, Inc. VX800/VX820 Host Bus Control
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 0
00:00.3 Host bridge: VIA Technologies, Inc. VX800 PCI to PCI Bridge
Flags: bus master, medium devsel, latency 0
00:00.4 Host bridge: VIA Technologies, Inc. VX800/VX820 Power Management Control
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 0
00:00.5 PIC: VIA Technologies, Inc. VX800/VX820 APIC and Central Traffic Control (prog-if 20 [IO(X)-APIC])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, fast devsel, latency 0
00:00.6 Host bridge: VIA Technologies, Inc. VX800/VX820 Scratch Registers
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, fast devsel, latency 0
00:00.7 Host bridge: VIA Technologies, Inc. VX800/VX820 North-South Module Interface Control
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 0
00:01.0 VGA compatible controller: VIA Technologies, Inc. VX800/VX820 Chrome 9 HC3 Integrated Graphics (rev 11) (prog-if 00 [VGA controller])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, fast devsel, latency 32, IRQ 10
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at f4000000 (32-bit, non-prefetchable) [size=16M]
Memory at f0000000 (32-bit, non-prefetchable) [size=64M]
[virtual] Expansion ROM at 80000000 [disabled] [size=64K]
Capabilities: <access denied>
Kernel modules: viafb
00:03.0 PCI bridge: VIA Technologies, Inc. VX800/VX820 PCI Express Root Port (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00001000-00001fff
Memory behind bridge: f5000000-f50fffff
Prefetchable memory behind bridge: 0000000080300000-00000000804fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:03.1 PCI bridge: VIA Technologies, Inc. VX800/VX820 PCI Express Root Port (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 00005000-00005fff
Memory behind bridge: f5100000-f51fffff
Prefetchable memory behind bridge: 0000000080100000-00000000802fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:0d.0 FLASH memory: VIA Technologies, Inc. Secure Digital Memory Card Controller
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32, IRQ 23
Memory at f5404000 (32-bit, non-prefetchable) [size=2K]
I/O ports at 4470 [size=8]
Capabilities: <access denied>
Kernel driver in use: via_sdmmc
Kernel modules: via-sdmmc
00:0f.0 IDE interface: VIA Technologies, Inc. VX800 Serial ATA and EIDE Controller (prog-if 8a [Master SecP PriP])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32
[virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
[virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1]
[virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
[virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1]
I/O ports at 4460 [size=16]
Capabilities: <access denied>
Kernel driver in use: pata_via
Kernel modules: pata_via
00:10.0 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32, IRQ 20
I/O ports at 4400 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
00:10.1 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32, IRQ 22
I/O ports at 4420 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
00:10.2 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32, IRQ 21
I/O ports at 4440 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
00:10.4 USB controller: VIA Technologies, Inc. USB 2.0 (rev 90) (prog-if 20 [EHCI])
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, medium devsel, latency 32, IRQ 23
Memory at f5404800 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
00:11.0 ISA bridge: VIA Technologies, Inc. VX800/VX820 Bus Control and Power Management
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: medium devsel
Capabilities: <access denied>
Kernel modules: i2c-viapro
00:11.7 Host bridge: VIA Technologies, Inc. VX8xx South-North Module Interface Control
Subsystem: VIA Technologies, Inc. Device 7323
Flags: medium devsel
00:14.0 Audio device: VIA Technologies, Inc. VT8237A/VT8251 HDA Controller (rev 20)
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, fast devsel, latency 0, IRQ 67
Memory at f5400000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd-hda-intel
01:00.0 Ethernet controller: Atheros Communications Inc. AR242x / AR542x Wireless Network Adapter (PCI-Express) (rev 01)
Subsystem: Askey Computer Corp. Device 7131
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at f5000000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: ath5k
Kernel modules: ath5k
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040 PCI-E Fast Ethernet Controller (rev 13)
Subsystem: Samsung Electronics Co Ltd Device c04e
Flags: bus master, fast devsel, latency 0, IRQ 66
Memory at f5100000 (64-bit, non-prefetchable) [size=16K]
I/O ports at 5000 [size=256]
Capabilities: <access denied>
Kernel driver in use: sky2
Kernel modules: sky2
和
$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:13:77:e6:c7:a3
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:36
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:9590 errors:0 dropped:0 overruns:0 frame:0
TX packets:9590 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:736608 (736.6 KB) TX bytes:736608 (736.6 KB)
wlan0 Link encap:Ethernet HWaddr 00:24:d2:e7:63:f7
inet addr:10.0.1.74 Bcast:10.0.1.255 Mask:255.255.255.0
inet6 addr: fe80::224:d2ff:fee7:63f7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23385 errors:0 dropped:0 overruns:0 frame:0
TX packets:23334 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:20059347 (20.0 MB) TX bytes:5466444 (5.4 MB)
和
$ iwconfig
lo no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"ridderzaal"
Mode:Managed Frequency:2.462 GHz Access Point: 90:84:0D:F0:14:3F
Bit Rate=1 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=14/70 Signal level=-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:53 Invalid misc:7 Missed beacon:0
eth0 no wireless extensions.
答案1
对于遇到同样问题的人，对我有用的方法是编译并安装 madwifi 驱动程序。我遵循以下说明：http://ubuntucrack.blogspot.nl/2010/07/howto-install-madwifi-drivers-for.html不同之处在于ath_pci我必须激活wlan模块（步骤 14）。
之后，将计算机置于睡眠状态后，wifi 不会启动。同样，对我有用的方法是转到文件并在带有 的行之前/usr/lib/pm-utils/sleep.d/55NetworkManager添加一行。ifconfig wifi0 upresume_nm
祝你好运！