Hildon

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Hildon
Hildon running in QEMU
Hildon running in QEMU
Name Hildon
Graphics stack X11
Toolkit GTK+2, WIP: GTK+3
Hildon on the Nexus 7 2013

This is the desktop from Maemo, which is a Debian-based distribution that originally ran on the N900 and earlier Nokia Internet Tablets.

Installation instructions

In pmbootstrap init, select hildon as user interface, then do the installation as usually. When running postmarketOS, it should boot automatically into Hildon now!

Running

hildon-desktop can be run in a horizontal view only. To run programs from the terminal you need to export DISPLAY=:0. To set it by default edit sudo nano /etc/profile.

Rotate screen using fbdev driver

In order to rotate the screen using the framebuffer, you need to create this file:

/etc/X11/xorg.conf.d/1-fbdev.conf

Section "Device"
  Identifier "LCD"
  Driver "fbdev"
  Option "Rotate" "CW"
EndSection

reference: https://www.x.org/archive//X11R6.8.0/doc/fbdev.4.html

Rotate screen using xrandr

In order to rotate the screen using xrandr, you need to edit a file and put xrandr -o right or xrandr -o left:

sudo apk add xrandr
sudo nano /etc/postmarketos-ui/xinitrc_hildon.sh
xrandr -o right
exec hildon-desktop

Calibrate the touchscreen

After rotating the screen change/add a value in this file:

sudo nano /etc/udev/rules.d/90-android-touch-dev.rules
ENV{ID_INPUT}="1", ENV{ID_INPUT_TOUCHSCREEN}="1", \
# default			ENV{LIBINPUT_CALIBRATION_MATRIX}="1 0 0 0 1 0"
# Left - 90 degree clockwise	ENV{LIBINPUT_CALIBRATION_MATRIX}="0 -1 1 1 0 0"
# 180 degree clockwise		ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 0 -1 1"
# Right - 270 degree clockwise	ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1"
# reflect along y axis		ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 1 0 0"

Performance issues

Software rendering is slow. A possible fix is in the Software OpenGL article with TinyGLES and similar software.

Relation to Maemo Leste

The Maemo Leste project runs Hildon on top of a recent Devuan (Debian fork) with OpenRC (the same init system that Alpine uses), and all the devices they are targeting run the mainline kernel (Droid 4, N900, N9, ...). postmarketOS has the Hildon packages as maintained by Leste packaged, and we're collaborating.

See also