Evv1L

@someoneFromInternet let me know if the issue will resolve after an update.

@someoneFromInternet looks old. Current BIOS version is 1.52.

You may have bugged version of thunderbolt controller as well.

Run fwupdmgr get-devices as root to check Thunderbolt Firmware version. Find "T480 Thunderbolt Controller" in output and check "Version" parameter.

It should say "20.00" or higher. If it's lower then I highly recommend you to upgrade your firmware ASAP!

Install fwupd and run these commands to update your firmware (run as root):

fwupdmgr refresh  
fwupdmgr update   

For more info check out this wiki page:
https://wiki.archlinux.org/title/Fwupd

@someoneFromInternet what BIOS version do you have? You can update firmware on T480 without USB stick. Use fwupd util.

@CorrodedCranium if you can afford a 600$ computer, maybe Framework will be a decent choice?

@pastermil X230 had it for a long time. But you have to do a BGA rework, 'cause CPU is not socketed like on T-series of that era.

@monovergent

@velox_vulnus no, there are no battery mods for 80 series.
It also has no CD/DVD that you can swap for 2nd drive or so.

I recommend you to watch a T480 review with disassembly first.

@velox_vulnus T480 owner here.

Don't expect T480 with i7 to actually run 4 GHz all times when needed. Get an i5 model instead.

I have i5-8350U. The best frequencies I could get on heavy load are 3.5-3.6 GHz (dGPU heatsink + PTM7950). Still throttles but not so much.

T480 has excellent battery life with both 24 + 72Wh batteries. What was the main reason why I got it.

My laptop wasn't refurbished. I got it used without some parts - SSD and both batteries. Then I bought all parts by myself.
It could be cheaper to refurb it by yourself rather than by someone else.