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3 months agoTPM uses parts of your system like hardware configuration, bios version, can even use parts of the OS, to generate a hashcode to decrypt your drive, so if anything gets replaced it wont automatically decrypt. what this allows is to have a much more complex decryption key and allows you to rely on OS security and much simpler passwords to protect your data because your OS (which cannot be replaced without breaking TPM) will protect against brute force attacks with retry delays and limits.
There are no drivers available because they are not needed, vast majority of hardware drivers are included in the Linux kernel, sometimes proprietary firmwares are needed but most distros tend to include them.
One of the big exceptions to this rule is the Nvidia driver, more recent cards now have an open source driver, but the 940mx included in the T470p is old and unsupported and wont do you much good on Linux.
i saw on the shop you linked they have a T480 with 8th gen i5 available for slightly more: https://www.pchouse.ro/lenovo-thinkpad-t480-14-fhd-i5-8350u-8gb-ddr4-256gb-ssd-nvme-windows-optional-laptop-refurbished-grad-a.html
This is one of the most popular Thinkpads currently because 8th gen intel made a large leap in performance (so the T480 low power CPU is almost as fast as the T470p high power one) and it also has pretty much perfect Linux support.
Otherwise the A485 would be my secret recommendation although kinda hard to find. its the same exact laptop as the T480 but with an AMD cpu which is pretty much the same speed as the intel one, but its integrated graphics are much faster, in fact almost matching the 940mx performance.