Can it be that bug : https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/111502
Because I'm also affected by this and disabling NetworkManager did solve many problem with my wireless card.
Also, can you mention the wireless card that you use?
Can it be that bug : https:/ /bugs.launchpad .net/ubuntu/ +source/ network- manager/ +bug/111502
Because I'm also affected by this and disabling NetworkManager did solve many problem with my wireless card.
Also, can you mention the wireless card that you use?