had to swap the Wifi card on both LibreBooted Lenovo x60s for Atheros ar5b95 Wireless WiFi WLAN Karte für HP g42 cq42 g62 cq62 580101-002 PCI-E

then it works like a charm.

(they do not exactly fit… the original ones are „longer“ thus help yourself with some non-conducting tape)

did a test setup of Trisquel 8.0 (Richard Stallman is using this! Why is it Ubuntu based (which again is Debian based)? we don’t know) on Lenovo t440 and works quiet well… except (again) the wifi (no open source drivers for the Intel Corporation Wireless 7260 (rev 83))

https://ark.intel.com/content/www/us/en/ark/products/75174/intel-wireless-n-7260.html

it is really a pain in the a… that there are so many: Board Form Factor: in this case it is a PCIe Half Mini Card/ M.2″ (whatever that means… it means it is very very small X-D more on form factors)

… now looking for an alternative to this card.

also: did not know the lenovo t440 has TWO (!) batteries. One is fixed inside the case, the other is removable and then (of course) there is the CMOS battery.

so it has 3x Batteries if you count the CMOS as well.

lspci -vvv
# says have this intel wifi installed: 

03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7260
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- 
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi
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