lsabayon wrote:Is there any reason behind this?
It's not to be expected, if that's what you mean. There's no good reason, and it's impossible for anyone to offer advice without you giving more information. What is your hardware? Which desktop environment are you using? Which network manager are you using? Are you using a wired or wireless network connection? If it is a wireless connection, are you using an unencrypted or an encrypted network? If encrypted, what type of encryption are you using? Is there any error message from the network manager GUI or desktop environment to indicate the loss of connection? If there is, what precisely is it? Are there any error messages in the file /var/log/messages? Are there any error messages in the output of the dmesg command before and after the loss of connection? Which network driver are you using (package name and version)? What manufacturer and model of router are you using?
What is the console output when you enter the following commands as root user in a Konsole/Terminal window (perform the last three before and after a loss of connection in order to see if there are any differences)?
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cat /var/log/messages | grep -i error