My laptop seems to be blocking other computers when connected to home DSL/cable routers via WIFI.
The problem is reproduced at several locations with the same laptop: other users complain that they are not able to connect to the WiFi router anymore, and when connected, they experience extremely slow traffic.
On my own laptop, everything seems to be fine, apart from occasional disconnections followed by difficult re-connections to the router.
The laptop is an HP Pavilion DM4 with Ubuntu 12.04. The wifi adapter is handled by cfg80211.
This is extremely annoying, and I cannot find any reports of similar problems on the Internet.
By any chance, could my problem be related to this? http://intel.com/support/wireless/wlan/sb/cs-006205.htm
Best Answer
It is likely that this is caused by a hardware fault or a driver problem. Try isolating the issue by acquiring or borrowing a USB wifi adaptor, and see if the problem goes away when you switch to using the external wifi.
If this fixes the problem, then you have a driver issue, and should file a bug. There are instructions on the steps to follow before filing a bug here: https://wiki.ubuntu.com/Kernel/LinuxWireless