Both have serious issues connecting to some web sites via Chrome or Firefox. eBay and Shutterfly are both culprits. Essentially, after a few connections they will no longer load pages from those sites and throw a ERR_CONNECTION_CLOSED error. The only remedy is to clear the browser cache every few connections. Not ideal to say the least.
I have tried multiple USB WiFi adapters and the problem is the same. With Windows 7 installed the WiFi works flawlessly. I can only conclude there is something odd about the T420, Linux, and WiFi.
If anyone can provide insight into this I will be in your debt!
If you can connect to the internet then it isn't a problem with your card. And if chrome and firefox work fine then it probally isn't your browser. So it will probaly be something to do with your networking settings, or network restrictions like in a work enviroment.
I'm sorry to hear you've got trouble.. Perhaps you could try to re-install Ubuntu? Should be pretty quick to do.
A side benefit of re-installing Ubuntu is that you can upgrade to 20.04, the new LTS and it will make your Thinkpad boot a lot faster than with 18.04
If you do decide to re-install I suggest to secure-erase the SSD first; I always suggest that before installing any OS.
I am also very opposed to upgrading OS-es across major versions like Win7 -> Win10, Ubuntu LTS releases if this is avoidable at all
What kind of WiFi network is this? Home? Office? Starbucks?
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on topic, it cannot be related to sh!tty router? i confirm T420's wifi should work perfectly
ThinkPad X230: i5-3320M CPU 3.3GHz - 8GB RAM 1600 MHz - SSD 860 EVO 500GB - Debian - ME_cleaned
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