I have a Lenovo X1 Carbon Gen 12. The other day I noticed both of my USB-C ports are not receiving or sending data. External drives won’t mount and my dock won’t send signal to my monitor, but when I plug in my charging cable I am still getting power. When I use “lsblk” nothing shows up, even though sometimes I hear the chime signaling something has been plugged in (but it’s inconsistent and sometimes doesn’t chime).
Both of my USB-A ports are working properly and receive data, so it’s only my USB-C ports.
I’m running Ubuntu 24.04.3. I tried to revert back to an earlier kernel in case that was the problem but it didn’t fix the issue.
Anyone have a similar issue? Thanks!
X1 Carbons of several generations have been notorious for their Thunderbolt defects, which appear after a while. For instance this or this (sorry for the Reddit links), and there are others related to connecting to screens. Right these days I’m dealing with the Thunderbolt-charging defect in my Gen 9. Luckily still under warranty.
Best of luck with your problem! I suggest you use your warranty if still active (and better with on-site assistance than sending the thing).