I’m new here so let me first introduce myself: Linux (Desktop / Servers) geek for some 3+ years, a refugee from MS Windows.
I’m struggling to revert back my machine to work with thunderbolt docks.
The config was working almost flawlessly for 8+ months but now it is all gone. My Yoga no longer detects any of my two HP G2 Thunderbolt docks. Interestingly, the docks started to work as USB devices (I can access connected USB devices, audio and network card, as I see from the config it is all routed through USB controller, but displays do not work anymore). Nor the device shows up in the Settings->Devices->Thunderbolt. I was thinking that Thunderbolt controller is down, but it does work with Razer CoreX dock pretty well and then it does show up.
The OS is Ubuntu 19.04.
I was blaming docks (would be surprised that both failed in the same moment of time), but it is also not a case as they work pretty well with another PC (HP G5 Zbook Studio X360) without a single glitch, so HP docks are ok themselves.
Thinkpad’s Yoga X390 controller is JHL6240, while docks (not sure here) are JHL7440.
I’ve read here that possibly JHL7440 is switchable between Thunderbolt and USB-C (h ttps://egpu.io/forums/thunderbolt-enclosures/list-of-intel-titan-ridge-thunderbolt-3-devices/) but my question is how to force switch it to the Thunderbolt mode?
Indeed it seems like they’re “sleeping” while my second HP Laptop “wakes it up” somehow.
Strange thing is, it was working for 8 months and now it does not …
Any help is highly appreciated.