Hi,
I have a question about my home wifi connection problem.
My laptop (slackware 15.0) can connect my office wifi automatically without any problem but it can not connect to my home wifi.
My landlord created an access point (SSID) for me for his router in the building. My android phone is able to connect to it.
I have tried "nmcli" to check the wifi status and it was OK, and other stuff as well. And I also tried using nmtui to edit the connection but it also failed.
Basically, it just kept asking me the SSID password and root password many times.

Any insight on how to fix it.

Thanks in advance for your help.

WiFi problems are not unusual. I have an old laptop which used to run Slackware v14.2, and now runs v15.0; and over the years I have run into many WiFi networks to which it is unable to connect. For example:

A friend of mine has a wireless access point which was set for 802.11bgn, and my old laptop was unable to connect. He was agreeable to my changing the configuration to 802.11bg --> and ever since my laptop connects just fine.

In about half the hotels I go to, my laptop has difficulty with their wireless. In some cases it can not connect at all, and in other cases it requires multiple attempts in order to get a connection.

In the town near me there is a business which has a wireless access point for the public to use. Both my laptop and my MikroTik wireless client are able to connect to the access point, but the system running the access point never issues an IP address. The local employees of the business have no idea how the system works, and have no interest in doing anything about it. My guesses are: there is a firewall misconfiguration, or they have some sort of legalese-user-agreement system which only works with Windows and MacIntosh.

1 members found this post helpful.

Agree with @baumei, not unusual.
But fixable

Could you (as root) post the output of these commands below:
uname -a
lspci -v
ifconfig <== this will tell us which one is your wnic, for example wlan0 in mine
iwlist <your wnic> scan