ASUS Zenbook Pro UX501VW

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Installation

Kernel

KERNEL Linux 4.10 touchpad and touchscreen support

Device Drivers --->
 Input device support --->
  [*] Mice --->
   <*> ELAN I2C Touchpad support
    [*] Enable I2C support
    [*] Enable SMbus support
  [*] Touchscreens --->
   <*> USB Touchscreen Driver
    [*] (All devices selected)
 
 I2C support --->
  [*] I2C support
  I2C Hardware Bus support --->
   <*> (I selected all Intel options)
   <*> Synopsys DesignWare Platform
   <*> Synopsys DesignWare PCI
   [*] Intel Baytrail I2C semaphore support

KERNEL Linux 4.10 wifi support

Device Drivers --->
 [*] Network device support --->
  [*] Wireless LAN --->
   [*] Intel devices
    <*/M> Intel Wireless WiFi Next Gen AGN - Wireless-N/Advanced-N/Ultimate-N (iwlwifi)
     <*/M> Intel Wireless WiFi MVM Firmware support

Configuration

Xorg

For proper input, video, and high DPI support on the 3840x2160 screen:

FILE /etc/portage/make.conf

INPUT_DEVICES="libinput"
VIDEO_CARDS="intel i965 nouveau"

Create a xorg configuration file to set the monitor size in millimeters (these values were quickly and crudely calculated; you may want to measure your own):

FILE /etc/X11/xorg.conf.d/90-hidpi.conf

Section "Monitor"
	Identifier	"<default monitor>"
	DisplaySize	342 193
EndSection

If not using GNOME or some other software which manages Xresources and DPI for you, you will need to specify the DPI:

FILE ~/.Xresources

Xft.dpi: 240

And you will need this line in someplace like ~/.xinitrc or ~/.xsession (depending on your configuration) in order to apply the Xresources file:

FILE ~/.xinitrc

xrdb -merge ~/.Xresources

Other applications may handle high DPI weirdly. The Arch wiki page on High DPI has many helpful hints.