The Pixel is fully supported by crouton with only a few minor caveats you need to keep in mind.

When issuing the command to build your chroot, you will want to add -t touch to your command. If you are adding a desktop environment target such as Xfce or Unity, you can combine it with touch via something like -t touch,xfce.

Be aware that until your favorite window manager supports high-DPI displays, results may vary. Users are having good luck using Xfce with a few minor tweaks:

1. sudo enter-chroot
2. Copy /etc/crouton/xserverrc-local.example to /etc/crouton/xserverrc-local, uncomment the XARGS line and modify the DPI value.

Support for dpi changes are quite spotty... but this way you get to keep text sharp.

1. In Xfce, right-click the desktop and choose Desktop Settings.
2. In Icons tab, increase the icon size. Recommended: 72.
3. Close the window.
4. Right-click the desktop and choose Applications > Settings > Appearance.
5. In the Icons tab, select Humanity, Humanity-Dark, or Tango. GNOME icons are not resolution independent.
6. In Fonts tab, enable Custom DPI and set it to 150, or adjust to your liking.
7. Close window.
8. Right-click the desktop and choose Applications > Settings > Panel.
9. Use the slider to increase the size of the panel. Recommended for ease of touch: 72.
10. Close the window.
11. Get a HiDPI Window Manager theme (https://github.com/mntmn/xfce4-hidpi-theme)
12. Extract in /usr/share/themes/
13. Enable it: Applications > Settings > Window Manager .
14. Switch the GTK style: Applications > Settings > Appearance > Style .

This should give you an interface normal humans are capable of working with. If you have any more tips, please share them!

Trades the extreme definition for a more standard resolution that works perfectly with any window manager. You can use the included setres script to change your resolution to something custom. The script does not do sanity-checking, so you may end up with a blank screen and have to kill the chroot from Chromium OS if you give a strange resolution. Some examples:

setres 1920 1280
setres 1680 1120
setres 1440 960
setres 1280 850

You can make one of these resolutions persistent by following these steps:

1. Generate a modeline:

cvt 1920 1280 60

It will output something like:

Modeline "1920x1280_60.00"  206.25  1920 2056 2256 2592  1280 1283 1293 1327 -hsync +vsync

2. Create a 10-monitor.conf file:

sudo vim /usr/share/X11/xorg.conf.d/10-monitor.conf

You should get something like this:

Section "Monitor"
  Identifier "Monitor0"
  Modeline "1920x1280_60.00"  206.25  1920 2056 2256 2592  1280 1283 1293 1327 -hsync +vsync
EndSection
Section "Screen"
  Identifier "Screen0"
  Device "eDP1"
  Monitor "Monitor0"
  DefaultDepth 24
  SubSection "Display"
    Depth 24
    Modes "1920x1280_60.00" "1280x960"
  EndSubSection
EndSection

If you want a different screen resolution, replace the Modeline line with the one generated by cvt for you, and add the mode to the Modes line.

Add a file /etc/X11/xorg.conf.d/90-monitor.conf to explicitly set the screen size, i.e. containing

Section "Monitor"
    Identifier             "<default monitor>"
    DisplaySize            270 180    # In millimeters
EndSection

These numbers are actually taken from the Xorg log file in /var/log -- no clear to me why the correct numbers don't end up being used. Not all apps handle this correctly

Sometimes when running in {gnome,unity}-xiwi, your session may get stuck with a dialog box complaining about the followings

   Could not apply the stored configuration for monitors
   none of the selected modes were compatible with the possible modes:
   Trying modes for CRTC 63
   CRTC 63: trying mode 1024x768@85Hz with output at 2200x1508@60Hz (pass 0)
   CRTC 63: trying mode 2048x1536@85Hz with output at 2200x1508@60Hz (pass 0)
   CRTC 63: trying mode 2048x1536@75Hz with output at 2200x1508@60Hz (pass 0)
   CRTC 63: trying mode 2048x1536@60Hz with output at 2200x1508@60Hz (pass 0)
   CRTC 63: trying mode 1920x1440@85Hz with output at 2200x1508@60Hz (pass 0)
   CRTC 63: trying mode 1920x1440@75Hz with output at 2200x1508@60Hz (pass 0)
   ... 

The solution (found here http://ubuntuforums.org/showthread.php?t=1852813) is to simply remove your ~/.config/monitors.xml.

   sudo enter-chroot
   mv .config/monitors.xml .config/monitors.xml.bkp

Then restart your session.

If you start one single application in XiWi window like this:

sudo startxiwi -n chroot_name app_name

To support HiDPI in your application window, you need to:

1. Check HiDPI in your "Crouton Integration" extension. (By doing this alone, the font will be super small).

2. Edit your chroot: sudo enter-chroot sudo vi /etc/crouton/xserverrc-xiwi add "-dpi 135x135" at the end of XARGS line.

Start your application again with startxiwi. Notice that the setting will be reset every time you update your chroot. Backup the file and re-do it after every update...