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dondrito
Not applicable
Posts: 9
Registered: ‎05-09-2011
Location: BR
Views: 1,189
Message 1 of 3

P1, Thunderbolt 3 dock, Ubuntu Linux 18.10, 2 external displays, hybrid graphics issue

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

 

jessie_c365
Not applicable
Posts: 11
Registered: ‎01-06-2015
Location: DE
Views: 1,085
Message 2 of 3

Betreff: P1, Thunderbolt 3 dock, Ubuntu Linux 18.10, 2 external displays, hybrid graphics issue

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:

 

https://wiki.ubuntu.com/Bumblebee

https://help.ubuntu.com/community/HybridGraphics

https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_P1

https://wiki.archlinux.org/index.php/NVIDIA_Optimus

https://github.com/Bumblebee-Project/Bumblebee/wiki/Multi-monitor-setup

 

Please share your experience!

 

Regards

dondrito
Not applicable
Posts: 9
Registered: ‎05-09-2011
Location: BR
Views: 1,044
Message 3 of 3

Re: P1, Thunderbolt 3 dock, Ubuntu Linux 18.10, 2 external displays, hybrid graphics issue

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.

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