The fingerprint reader is not yet supported on 6th gen X1.I never tried to get the LTE modem working. Funnily, I didn't even realize that the slot existed for almost a year after purchase.
$ fwupdmgr enable-remote lvfs-testing
Firmware metadata has not been updated for 30 days and may not be up to date.
Update now? (Requires internet connection) [y|N]: y
Fetching metadata https://cdn.fwupd.org/downloads/firmware-testing.xml.gz
Downloading… [***************************************] Less than one minute remaining…
Fetching signature https://cdn.fwupd.org/downloads/firmware-testing.xml.gz.asc
Failed to update metadata for lvfs-testing: '48A6D80E4538BAC2' is not a valid signature
The USB id of the fingerprint reader on X1C6 is 06cb:009a while on X1C7 it is 06cb:00bd.
This is the list of supported devices: https://fprint.freedesktop.org/supported-devices.html
As you can see the one for X1C7 is supported, X1C6 unfortunately isn't.
This is their gitlab issue for it: https://gitlab.freedesktop.org/libfprint/libfprint/issues/13...