HP Envy x360 13z-ag000
The HP Envy X360 13z-ag000 was released in 2018. It has variable processors/ram and displays, from a Ryzen Mobile 2300U to a 2700U, from 4GB RAM to 16GB RAM, and a 1080p display to a 4K display.
The specs of my particular model are:
- 2500U with 16GB RAM
- 4K display
- Realtek RTL8822BE wireless chip
|GPU||AMD Vega IGPU||Working||xf86-video-amdgpu; Backlight works|
|Camera||Normal 1080p + IR 336x340||Untested||uvcvideo|
|Sensors||STM Sensor hub||Not Working||On Windows used for orientation sensing and hard drive drop protection|
|USB C||AMD xHCI Host Controller||Not Working||Data and DP working|
This laptop has secure boot enabled by default. To start the installer you need to disable it in the UEFI. Then you can just boot the installer in UEFI mode and just install like a normal UEFI system.
There appears to be an option to use your own Secureboot keys. I've not yet investigated that.
Battery and Power Management
a 4 hour battery life because of the 4K display. Currently I'm running a patched 4.17 kernel; 4.18 might improve battery life somewhat.
Display, Video Card
The integrated Vega GPU works with the AMDGPU drivers.
GDK_SCALE=2 is somewhat necessary for most applications.
Touchscreen and Stylus
You need to build a Kernel with custom patches to get the touchscreen working. 
iio sensors are enumerated as of 4.18-rc7, with all possible iio modules compiled.
iio-sensor-proxy returns no sensors detected.
Works out of the box.
aspm=0 seems to prevent the card from dropping offline as much, but also worsens battery life.
Built-in NVME drive works with advertised speed. Blockdevices are loacated at /dev/nvme0n1p*.
Untested, but there shouldn't any difficulties.