You are not logged in.
Hi there,
I have a problem that is driving me crazy.
My network sometimes (without reason) goes down and from that time it is not possible to restart it unless I reboot the laptop.
It just says: "no wireless networks found". I have tried to restart wicd and the network but no result.
I have tried also to do a sudo iwlist scan, tried to do a ifconfig wlan0 up with no success. I have got messages such as: "SIOCSIFFLAGS: Invalid argument" and "wlan0 Interface doesn't support scanning : Network is down".
I have tried also to rmmod and modprobe ath5k (my network card is an Atheros) and other modules but still nothing.
Any other idea?
Cheers!
Edit:
I don't rimember the first time I got this problem (not less than 5 6 months)
Last edited by zadaran (2013-01-09 12:57:19)
Offline
This may be a silly question, but have you checked to see if any other computers on your network are losing connectivity as well?
smaug@dalnet/freenode
Offline
If it works (I suspect it will) the following would be much easier than rebooting
#first kill any wpa_supplicant or dhcpcd processes, then:
sudp ip link set wlan0 down
sudo ip link set wlan0 up
sudo iwlist wlan0 scan
"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" - Richard Stallman
Offline
This may be a silly question, but have you checked to see if any other computers on your network are losing connectivity as well?
Yes it works with other laptops. No problems with my laptop and Win7.. it's just with Arch..
Offline
If it works (I suspect it will) the following would be much easier than rebooting
#first kill any wpa_supplicant or dhcpcd processes, then: sudp ip link set wlan0 down sudo ip link set wlan0 up sudo iwlist wlan0 scan
I'm going to try it but I foreseen a "SIOCSIFFLAGS: Invalid argument" error message when trying to do the "sudo ip link set wlan0 up"..
I'll keep you updated!
Offline
Don't know why but still no wireless down... It's totally random..
Offline
Ok, it happened:
when I tried: sudo ip link set wlan0 down
It prompted me that it could not find wlan0
O.o
Offline
Could you post the results of:
lspci | grep Network
and (though may not give anything back)
iwconfig
Can you bring your wireless back up by unloading / reloading the module?
# modprobe -r ath5k
# modprobe ath5k
I was getting random disconnects and slowdowns (on an Intel chip) due to the devilish combination of poor ipv6 handling and wireless N - displayed similar symptoms to what you are experiencing, however
There are effective fixes on the wiki for both situations - could be used to discount those particular issues if nothing else
Offline
Could you post the results of:
lspci | grep Network
and (though may not give anything back)
iwconfig
Can you bring your wireless back up by unloading / reloading the module?
# modprobe -r ath5k # modprobe ath5k
I was getting random disconnects and slowdowns (on an Intel chip) due to the devilish combination of poor ipv6 handling and wireless N - displayed similar symptoms to what you are experiencing, however
There are effective fixes on the wiki for both situations - could be used to discount those particular issues if nothing else
Thanks for your support..
This problem is really annoying.. (above all because it's random..)
With the: ~ $ sudo ip link set wlan0 up, today I got this message:
RTNETLINK answers: Invalid argument
lspci | grep Network
03:00.0 Network controller: Atheros Communications Inc. AR9287 Wireless Network Adapter (PCI-Express) (rev 01)
~ $ iwconfig
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Frequency:2.422 GHz Access Point: Not-Associated
Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
I will try to look again in the wiki but I haven't found anything that looks exactly like my problem..
Cheers
Offline
Hello!
I've experienced similar problems with suddenly vanishing atheros wlan-card. (AR2427)
It pointed out to a problem with the power management setting which causes this behaviour when set to 'on'.
Once fallen in sleep-mode after some time IDLE the card won't wake up any more and is 'gone' till you manually bring it up again.
By setting 'Power Management:off' permanently for the card using an udev rule or LaptopModeTools the problem was gone for me.
Offline
Hello!
I've experienced similar problems with suddenly vanishing atheros wlan-card. (AR2427)
It pointed out to a problem with the power management setting which causes this behaviour when set to 'on'.
Once fallen in sleep-mode after some time IDLE the card won't wake up any more and is 'gone' till you manually bring it up again.By setting 'Power Management:off' permanently for the card using an udev rule or LaptopModeTools the problem was gone for me.
Hi!
Thanks for your advice!
So I have to disable the Power management just for the card, not the power management in general, right?
I hope it works!
Offline
Yes, only the wifi-cards power-management has to be disabled
...like as it is mentioned here
Last edited by renegat (2013-01-25 08:59:43)
Offline
Thanks again mate,
The network these days look fine. A week it works always fine, another week it gives me problem every day..
I get:
# sudo journalctl -b | grep wlan*
# kernel: IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
# kernel: IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
# kernel: IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
# kernel: wlan0: authenticate with XX:XX:XX:XX:XX:XX
# kernel: wlan0: send auth to XX:XX:XX:XX:XX:XX (try 1/3)
# kernel: wlan0: authenticated
# kernel: wlan0: associate with XX:XX:XX:XX:XX:XX (try 1/3)
# kernel: wlan0: RX AssocResp from XX:XX:XX:XX:XX:XX (capab=0x411 status=0 aid=3)
# kernel: wlan0: associated
# kernel: IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
It is different but I'll try to run that command if the problem comes back.
Thanks again for your advices
Offline