04-15-2019 02:33 PM - last edited on 04-16-2019 01:47 AM by Andy_Lenovo
I recently got a Thinklpad P1 from my company for work, together with a Thunderbolt 3 dock. The installed OS is Ubuntu Linux 18.10 (standard flavour, with Gnome).
When I set the graphics to "Hybrid" in the Bios, the 2 external displays plugged in the dock are not detected. Network and USB work fine. When I switch to "Discrete", both monitor are detected and work fine.
It's annoying, because the laptop heats up more, the fan runs almost all the time and if I use the laptop unplugged the battery is drained much faster, unless I switch temporarily back to Hybrid.
I'm grateful for any help!
Admin note: subject edited for relevancy, was: T480s and USB C Dock - 3 external monitors
Solved! Go to Solution.
04-21-2019 03:08 PM
I'll receive a P1 with dock soon and will use Debian. I'm using T530 in Discrete Mode right now where heat never was a problem, so it is running in Discrete Mode. Good to know that Discrete Mode will do for P1, too. But I would appreciate using Hybrid/Optimus Mode. These are some of my findings in preparation:
Please share your experience!
04-26-2019 09:39 AM
The problem is related to Wayland. In X11 sessions everything works fine. I'm fine with using X11. Anyway I installed XFCE which I like better than Gnome and uses X11. So I will close this. I using the standard Ubuntu with Gnome, choose "Ubuntu" not "Ubuntu (Wayland)" on the login screen.