My laptop can not see usual WIFI SSID on my OPENWRT router.
Router has 2.5 and 5 GHz radios
There are 2 SSID (networks) on 5 GHz radio. Lets call them A and B.
Also there are 2 SSIDs on 2.5GHz band - not affected
More on situation:
Normally my Laptop is connected to network A
After a periode interference (pickup when ping'ing router) I don't even see network A on laptop now
I don't see deauth or ping sweeps in Wireshark so I think some sort of jamming is going on
My phone can connect normally to Network A
My Laptop can connect normally to Network B (the 5 GHz band)
Everything normal on 2 networks on 2.5GHz radio
I launched a Rasp. pi on network to see what's going on. It crashed.
Wi-fi adaptor on laptop works fine
Router works fine on both 2.5 and 5 GHz bands
Have very hostile neighbors - think some jamming is going on
I have changed hostname and mac adress on wireless adaptor on Laptop - and still do not see Network A
Is it possible to jam just a Wi-fi client and not the entire channel (phone connect without any problems to network A but network A does not even come up on list of wifi networks on Laptop)?
Any idea whats going on and where to get info about type of attack ?
This is illegal - and would cause you more issues on the channel you use. Other devices will simply start using the channel(s) not being interfered with. If you jam the entire band (i.e. all channels - which is possible with unlicensed/untested jamming equipment), you'll have more issues. What you desire to do is counterintuitive in theory.
Select a channel manually. Best to do an RF scan to see what channels are least congested, then select a channel that is not a DFS channel (see the links I posted earlier). Also make sure you've correctly set your country code in the wifi settings.
But let's start with
a) you manually specifying the channel
b) you posting your config files so that we can see what might be happening if there are any technical details that could be relevant or any errors in the config.
That's okay. I appreciate that you are using English here. In all troubleshooting (no matter what the topic or field), details are often critical for successfully fixing things. You're currently the only one who actually has the details, so we're only able to guess for now.
I get that I might be wrong in my guesses, but this sounds rude (even if you didn't mean it to be, the ALL-CAPS is equivalent to yelling)... so the more info you can provide, the better the advice you can get.