We have two identical laptops, both of which have been running Ubuntu for 1,5 years without any trouble. Now one of them cannot see any wireless networks anymore.
The laptop and its user are abroad, so I cannot do direct troubleshooting. But what I understood over the phone was:
- A driver problem is unlikely, it's an Intel chipset, no propietary drivers used
- Replacing NetworkManager with WICD did not help, wicd also does not see any networks.
- 'sudo ifconfig' shows an active WLAN0, but no connection
What can be possible reasons for the problem and how can we resolve this? Any hint will be appreciated.