If there are MIC failures, it's likely that it's instead a bug in the
kernel driver used. But just to be sure...
Are you on battery when you try to connect? Is the behavior the same if
the power supply is connected (e.g. can you successfully connect then?)
There has been issues in the past coming from power saving modes on
wireless devices, so this is worth testing.
** Changed in: network-manager (Ubuntu)
Status: New => Incomplete
** Changed in: network-manager (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1063445
Title:
Wireless not connecting, disconnecting
Status in “network-manager” package in Ubuntu:
Incomplete
Bug description:
When trying to connect to almost any wireless network, it never connects, the
indicator just keeps moving until it says Disconnected a minute or so later.
This happens 100% of the time with all encryped networks, and 99% of the time
with unencrypted networks. I have so far have not been able to connect to an
encrypted network, only unencrypted after several tries.
The very rare case when it does actually manage to connect (this is usually
after trying to connect for an hour or so, many times beforehand, switching
on/off the wireless with the hardware switch), it actually stays connected
until you manually disconnect, and is also quite stable (downloads and PPTP
connections work with no problem).
Attached is a snippet of the old syslog from a few days ago when I was
trying to connect, the current syslog doesn't have any relevant info
as I am not near a wireless network currently. I will be in a position
to do further testing tomorrow, if needed.
The system is a netbook:
Acer Aspire one,
with Atheros AR5BXB63 wireless card
-----------------------------------------------------------------------------------
$ lsb_release -rd
Description: Ubuntu 12.04.1 LTS
Release: 12.04
-----------------------------------------------------------------------------------
network-manager:
Installed: 0.9.4.0-0ubuntu4.1
Candidate: 0.9.4.0-0ubuntu4.1
Version table:
*** 0.9.4.0-0ubuntu4.1 0
500 http://si.archive.ubuntu.com/ubuntu/ precise-updates/main i386
Packages
100 /var/lib/dpkg/status
0.9.4.0-0ubuntu3 0
500 http://si.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
-----------------------------------------------------------------------------------
$ modinfo ath5k
filename:
/lib/modules/3.2.0-31-generic-pae/kernel/drivers/net/wireless/ath/ath5k/ath5k.ko
license: Dual BSD/GPL
description: Support for 5xxx series of Atheros 802.11 wireless LAN cards.
author: Nick Kossifidis
author: Jiri Slaby
srcversion: FA2500C2D3C1A3B6094E37C
alias: pci:v0000168Cd0000001Dsv*sd*bc*sc*i*
alias: pci:v0000168Cd0000001Csv*sd*bc*sc*i*
alias: pci:v0000168Cd0000001Bsv*sd*bc*sc*i*
alias: pci:v0000168Cd0000001Asv*sd*bc*sc*i*
alias: pci:v0000168Cd00000019sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000018sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000017sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000016sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000015sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000014sv*sd*bc*sc*i*
alias: pci:v0000168Cd00001014sv*sd*bc*sc*i*
alias: pci:v000010B7d00000013sv*sd*bc*sc*i*
alias: pci:v0000A727d00000013sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000013sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000012sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000011sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000007sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000207sv*sd*bc*sc*i*
depends: mac80211,cfg80211,ath
intree: Y
vermagic: 3.2.0-31-generic-pae SMP mod_unload modversions 686
parm: nohwcrypt:Disable hardware encryption. (bool)
parm: all_channels:Expose all channels the device can use. (bool)
parm: fastchanswitch:Enable fast channel switching for
AR2413/AR5413 radios. (bool)
------------------------------------------------------------------------------------
$ iwconfig
lo no wireless extensions.
virbr0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"Prospero632"
Mode:Managed Frequency:2.462 GHz Access Point: 02:30:B4:0B:56:50
Bit Rate=1 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=13/70 Signal level=-97 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:1 Invalid misc:2 Missed beacon:0
eth0 no wireless extensions.
------------------------------------------------------------------------------------
$ lspci -v
(omitted irrelevant devices)
03:00.0 Ethernet controller: Atheros Communications Inc. AR242x / AR542x
Wireless Network Adapter (PCI-Express) (rev 01)
Subsystem: Foxconn International, Inc. Device e008
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at 55200000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 2
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [60] Express Legacy Endpoint, MSI 00
Capabilities: [90] MSI-X: Enable- Count=1 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Kernel driver in use: ath5k
Kernel modules: ath5k
-------------------------------------------------------------------------------------
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28
Uname: Linux 3.2.0-31-generic-pae i686
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Sun Oct 7 23:01:50 2012
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
IpRoute:
default via 10.1.0.1 dev eth0 proto static
10.1.0.0/24 dev eth0 proto kernel scope link src 10.1.0.200 metric 1
169.254.0.0/16 dev eth0 scope link metric 1000
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to precise on 2012-07-13 (86 days ago)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
wlan0 802-11-wireless disconnected
/org/freedesktop/NetworkManager/Devices/1
eth0 802-3-ethernet connected
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE
WIFI WWAN-HARDWARE WWAN
running 0.9.4.0 connected enabled enabled
enabled enabled enabled
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