It is a lenovo x201 thinkpad. Underneath the laptop it says Type 3626-A15 S/N -R9-6HLY3 10-08


as far as i know its a standard model, but cant be sure only had it a week..

My current theory is the problem might relate to the 2.4 and 5g networks having the same SSID name on your "dual band" router. I wonder if the housemate or family member who administers your router would be willing to give different SSID's to the 2.4g and 5g networks, temporarily, as a troubleshooting step?

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stuck now.

:-(

Of course. Im the router admin person. What will i do?

How do i alter router?

On closer examination of your termbin.com/5017, I see this line:

And it is seeing your 5g networks. So maybe my idea is not such a good one. There are a couple other people helping you, so let's give them a chance to catch up with suggestions before you try snowpine's crazy idea and mess up your router settings.

thankyou for being candid snowpine. This technology stuff aint that easy for me..

Hello redcogs et al .. ;-)

... frustrating problem. I've had a few of these before, and sometimes the solutions surprise me.

For example, on my own home network, I've had trouble with a few devices that absolutely refused to connect wirelessly to wither the 2.4 or 5GHz band. All client setup options perfect. In one case, it turned out that the hardware device was incapable of connecting to a router that had MAC filtering on and / or SSID broadcasting off.

So, what I tend to do now, is to make sure that all security options other than the usual WPA2 encryption are not used (so in my above example: MAC filtering turned OFF and SSID broadcasting turned ON). This is how I found that the above device was incompatible with MAC filtering (manufacturer's help desk later confirmed this). Although this seemed odd to me, I didn't really mind turning off MAC filtering .. I used it more as a deterrent to drive-by use - it's getting more and more easy to spoof MACs.

Long story to suggest that you make sure your router is set up using just basic WPA2-PSK AES encryption. See if this makes any difference.

Another troubleshooting route would be to set up a DHCP reservation in your router for the MAC address of the network card in the Lenovo laptop and seeing if that has any effect ...

Lastly ... see if your router's logs has any useful information on *where* in the process the failure occurs. In some cases I've seen, the actual WPA2 authentication goes through, but the assignation of an IP address lease doesn't happen (hence the reservation tip above - you could even go as far as assigning a static address to the card for additional troubleshooting).

The GUI tools prevalent in most popular distros are great at making things user friendly, but they hide the detailed messages you see when establishing a network connection using command-line tools.

Worst case scenario here may be that the wireless adapter in the Lenovo is just not compatible with current linux kernels, or that the firmware version is not properly matched. These are more difficult problems to resolve - so let's stick with the above ideas first.

Hope this may be helpful - let us know how it goes.

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i appreciate your insights Rickkkk. I'll not get chance to do much now cos its sleep time but maybe later tomorrow some kind soul will advise me how to proceed :-)

I also had this problem with my wireless wi-fi. I discovered that the password for my wireless device did not have the proper password.After I entered the proper password it worked fine.

May I suggest that you double-check the password, and any other configuration listed in the instructions, connected with your wireless device.

Sleep well! Here are three questions for you to answer in the morning:

1. When you scan for available wifi networks in Network Manager, how many choices do you see, and which one do you choose?

According to your termbin link there are 6 networks in range:

See how there are 3 different SSID's (not 6) and the names repeat at both 2462 and 5240 MHz? That means you have a "dual band" router with both 2.4 and 5GHz capabilities.

Most of the time, dual band routers work great. Your wifi devices seamlessly "roam" back and forth between the 2.4 and 5g networks as you move through the house, taking advantage of the faster 5g bandwidth whenever possible.

But if there is a bug in the Ubuntu kernel with your specific wifi chipset and your specific router configuration (and I'm not saying there definitely is, or isn't, just that it's an idea that's been suggested) then that might explain why you are typing the correct password over and over again, but the router is not letting you into the network.

2. Is your router in the default settings as it came from your ISP company? You haven't logged into the control panel and changed settings or passwords? Any recent power outages that might have caused settings to reset? The card with the password, has only one password, not two different passwords for 2.4 and 5g?

3. While connected with the ethernet cord, have you brought Linux Mint fully up to date with the Update Manager, and then rebooted?

Ensure that you are connecting to your network.

If you don't know your network name call your ISP.

This video might help.

https://www.youtube.com/watch?v=p19b5EbfQlk

Here's the Intel iwlwifi firmware drivers for Linux

https://www.intel.com/content/www/us...etworking.html

here https://wiki.debian.org/iwlwifi non free driver as in you have to download it. Not able to distribute it.
cost is free though
Network controller: Intel Corporation Centrino Advanced-N 6200