I am using a HP laptop running ubuntu LTS, always upgraded and updated to the latest version.
I work in different places using WiFi connection. I can connect without problems to WiFi_1. Then I leave the laptop in suspended mode so that I can secure my work to continue in the next place. When I reach home or a cafe, 90% of the times the network manager is unable to find the WiFi signal, or any other wifi signal (including mobile hotspot). I have to restart the computer, and often times this works, the signal is encountered, but many other times restarting the system does not work at all and I spend the whole afternoon without internet connection.
I think this is related to some information from WiFi_1 that is remaining in the system (because I left it in suspended mode), that makes hard for any other connection to connect afterwards. How can we troubleshoot this problem?