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Thread: Wireless disconnects randomly... needs authentication

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hi i'm having problem since i've installed first ubuntu ( 8.04). i'm surfing through websites ... watching movies ....and happens think randomly.. im loosing connection network-manager needs authentication doesnt work..if type console iwconfig parameters ap , essid bit rate empty. iwlist wlan0 scanning no results.. nm-tool shows need authentication said doesnt work... funny thing helps resart laptop..with plugged off power. works give details whenever works , whenever has crashed

code:
iwconfig ieee 802.11bg  essid:"salsa"             mode:managed  frequency:2.457 ghz  access point: 00:1e:2a:6c:e4:f8              bit rate=54 mb/s   tx-power=20 dbm              retry  long limit:7   rts thr:off   fragment thr:off           power management:off           link quality=44/70  signal level=-66 dbm             rx invalid nwid:0  rx invalid crypt:0  rx invalid frag:0           tx excessive retries:0  invalid misc:1043   missed beacon:0 nm-tool  type:              802.11 wifi   driver:            ath5k   state:             connected   default:           yes   hw address:        00:16:44:c4:82:aa    capabilities:     speed:           54 mb/s    wireless properties     wep encryption:  yes     wpa encryption:  yes     wpa2 encryption: yes    wireless access points (* = current ap)     *salsa:            infra, 00:1e:c3:5c:e4:f8, freq 2457 mhz, rate 54 mb/s, strength 65 wpa2     nlm:             infra, 00:26:f2:0b:c2:76, freq 2437 mhz, rate 54 mb/s, strength 47 wpa    ipv4 settings:     address:         192.168.1.5     prefix:          24 (255.255.255.0)     gateway:         192.168.1.1      dns:             192.168.1.1 lshw- c network *-network                       description: ethernet interface        product: mcp67 ethernet        vendor: nvidia corporation        physical id:        bus info: pci@0000:00:0a.0        logical name: eth0        version: a2        serial: 00:14:0b:46:c5:43        capacity: 100mbit/s        width: 32 bits        clock: 66mhz        capabilities: bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation        configuration: autonegotiation=on broadcast=yes driver=forcedeth driverversion=0.64 latency=0 maxlatency=20 mingnt=1 multicast=yes port=mii        resources: irq:43 memory:f0788000-f0788fff ioport:30f8(size=8) memory:f0789c00-f0789cff memory:f0789800-f078980f   *-network        description: wireless interface        product: ar242x / ar542x wireless network adapter (pci-express)        vendor: atheros communications inc.        physical id: 0        bus info: pci@0000:03:00.0        logical name: wlan0        version: 04        serial: 00:16:44:c2:82:ba        width: 64 bits        clock: 33mhz        capabilities: bus_master cap_list ethernet physical wireless        configuration: broadcast=yes driver=ath5k driverversion=3.0.0-16-generic firmware=n/a ip=192.168.1.5 latency=0 multicast=yes wireless=ieee 802.11bg        resources: irq:17 memory:f0400000-f040ffff  uname -a  linux amilo 3.0.0-16-generic #29-ubuntu smp tue feb 14 12:49:42 utc 2012 i686 athlon i386 gnu/linux  lspci  00:00.0 ram memory: nvidia corporation mcp67 memory controller (rev a2) 00:01.0 isa bridge: nvidia corporation mcp67 isa bridge (rev a2) 00:01.1 smbus: nvidia corporation mcp67 smbus (rev a2) 00:01.3 co-processor: nvidia corporation mcp67 co-processor (rev a2) 00:02.0 usb controller: nvidia corporation mcp67 ohci usb 1.1 controller (rev a2) 00:02.1 usb controller: nvidia corporation mcp67 ehci usb 2.0 controller (rev a2) 00:04.0 usb controller: nvidia corporation mcp67 ohci usb 1.1 controller (rev a2) 00:04.1 usb controller: nvidia corporation mcp67 ehci usb 2.0 controller (rev a2) 00:06.0 ide interface: nvidia corporation mcp67 ide controller (rev a1) 00:07.0 audio device: nvidia corporation mcp67 high definition audio (rev a1) 00:08.0 pci bridge: nvidia corporation mcp67 pci bridge (rev a2) 00:09.0 sata controller: nvidia corporation mcp67 sata controller (rev a2) 00:0a.0 ethernet controller: nvidia corporation mcp67 ethernet (rev a2) 00:0b.0 pci bridge: nvidia corporation mcp67 pci express bridge (rev a2) 00:0c.0 pci bridge: nvidia corporation mcp67 pci express bridge (rev a2) 00:0d.0 pci bridge: nvidia corporation mcp67 pci express bridge (rev a2) 00:18.0 host bridge: advanced micro devices [amd] k8 [athlon64/opteron] hypertransport technology configuration 00:18.1 host bridge: advanced micro devices [amd] k8 [athlon64/opteron] address map 00:18.2 host bridge: advanced micro devices [amd] k8 [athlon64/opteron] dram controller 00:18.3 host bridge: advanced micro devices [amd] k8 [athlon64/opteron] miscellaneous control 02:00.0 vga compatible controller: nvidia corporation g86 [geforce 8400m g] (rev a1) 03:00.0 ethernet controller: atheros communications inc. ar242x / ar542x wireless network adapter (pci-express) (rev 04)   dmesg[28871.485100] init: modemmanager main process ended, respawning [28871.494897] init: modemmanager main process (12201) terminated status 255 [28871.494940] init: modemmanager main process ended, respawning [28871.502617] init: modemmanager main process (12203) terminated status 255 [28871.502662] init: modemmanager respawning fast, stopped [28871.636314] init: network-manager main process (12185) killed abrt signal [28871.636370] init: network-manager main process ended, respawning [28871.643927] init: modemmanager main process (12205) terminated status 255 [28871.643980] init: modemmanager main process ended, respawning [28871.654524] init: modemmanager main process (12208) terminated status 255 [28871.654569] init: modemmanager main process ended, respawning [28871.664846] init: modemmanager main process (12211) terminated status 255 [28871.664889] init: modemmanager main process ended, respawning [28871.673037] init: modemmanager main process (12213) terminated status 255 [28871.673082] init: modemmanager main process ended, respawning [28871.688585] init: modemmanager main process (12215) terminated status 255 [28871.688643] init: modemmanager main process ended, respawning [28871.695826] init: modemmanager main process (12217) terminated status 255 [28871.695884] init: modemmanager main process ended, respawning [28871.706585] init: modemmanager main process (12219) terminated status 255 [28871.706628] init: modemmanager main process ended, respawning [28871.716529] init: modemmanager main process (12221) terminated status 255 [28871.716583] init: modemmanager main process ended, respawning [28871.727678] init: modemmanager main process (12223) terminated status 255 [28871.727737] init: modemmanager main process ended, respawning [28871.738184] init: modemmanager main process (12225) terminated status 255 [28871.738236] init: modemmanager main process ended, respawning [28871.748884] init: modemmanager main process (12227) terminated status 255 [28871.748927] init: modemmanager respawning fast, stopped [28871.880297] init: network-manager main process (12209) killed abrt signal [28871.880342] init: network-manager respawning fast, stopped

please killing me softly...
many useful tips



Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Networking & Wireless [ubuntu] Wireless disconnects randomly... needs authentication


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