Lenovo Yoga 900

Still working on installation, wiki will come soon.

Forum
see https://forums.gentoo.org/viewtopic-p-8223726.html#8223726 for intallation discussion

Graphics
See Intel.

Display
Backlight control through brightness buttons works without modification on X screen resolution is a little bit tricky to tune

In xfce->settings->appearance->fonts, set custom DPI to 140 see https://wiki.archlinux.org/index.php/Xorg#Display_size_and_DPI for more settings on DPI especially for gtk3 based app

sound
The package is required.

bluetooth
working under command line (net-wireless/bluez-tools) could pair to an android phone

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

Touchpad and TouchScreen
See Synaptics to configure.

SD card
The reader detects the partition but gives timeouts on linux 4.16.11

must try if patch https://patchwork.kernel.org/patch/10089863/ fixes the issue