Hibernation shortcut works!
Tumbler’s hibernation shortcut is now working! Turns out the event was being catched by XFCE’s Power Manager. It was set to «Do Nothing» so there was a conflict there. That explains why it worked intermitently. Now it works, yay!
Opened Tumbler, I cleaned it a bit and was curious to see if I had the WWAN radio installed. A SIM port is there and I see connections in place, but no, there’s no radio adapter inside. Oh well. What would I do with it, anyway? I can’t even use Tumbler on the road, its battery is completely dead. Also, Tycho has a WWAN card and I’ve never used it.
Gave a look at Tumbler’s Bluetooth adapter, maybe I can put it on Tycho? Nope, they’re different models. Oh well.