Some people have been experiencing WiFi problems with Ubuntu 10.10 since a update that happend just before Christmas 2010 . The problem seems to being a bug in a kernel module, which prevents the Rfkill ' s soft and hard blocks from syncing correctly.
In practice so means you can press your laptop's WiFi button as often as you want, it doesn ' t change anything. Your Wireless adapter would always appear as disabled. If you are try to start the wireless interface manually your get the following error message:
sk@ubuntu:~#
sudo ifconfig wlan0 up Siocsifflags:operation not possible due to Rf-kill If your do a
Rfkill List AllYou are should get a output similar to this:
sk@ubuntu:~$
sudo rfkill list all 0:hp-wifi:wireless LAN
Soft Blocked:yes
Hard Blocked:no
1:phy0:wireless LAN
Soft Blocked:yes
Hard Blocked:no Depending on the state of your WiFi button the
Hard blockedWould either be
YesOr
No. Press the WiFi button and run
Rfkill List AllAgain to make sure the value for
Hard blockedChanges.
The actual problem is the
Soft blockedThe value is always set to
Yes, because for some reason the syncing between the hardware blocks and the software block doesn ' t work as supposed. To override this behavior, you can just run
Rfkill unblock WiFiAnd it should work again. Double check by entering
Rfkill List AllAgain and make sure it looks as this, with the all values set to
No:
sk@ubuntu:~$
sudo rfkill list all 0:hp-wifi:wireless LAN
Soft Blocked:no
Hard Blocked:no
1:phy0:wireless LAN
Soft Blocked:no
Hard Blocked:no If You then run
ifconfig wlan0 up(or enable the wireless via your desktop ' network manager) you should is able to connect to a wireless network with Out of any further issues.
The configuration, which I ' ve been using:
Compaq presario CQ60 atheros AR5001 Wireless network Adapter I 10.10 Read, that also some the people fix it, by T Urning off the Wi-Fi button during the boot process and then switch it on again, once the "system is" up and running. It seems that the system expects the hard blocks to is set to. This is still a bug, but it could explain why then the soft blocks didn ' t sync with the hard blocks any more.
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