Prerequisites

Install AlpineLinux
Create a user account (optional but recommended)
Enable the Community repository
Install Xorg

Install MATE Desktop

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If you are running your Alpine from RAM, save the changes:

# lbu ci

Try, starting dbus and lxdm. This will start the display manager and should allow you to login.

# rc-service dbus start

rc-service lxdm start

If it worked, enable the services to start on reboot

# rc-update add dbus

rc-update add lxdm

Misc

True type fonts

Add all available True Type Fonts:

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Disabling standby and screensaver

Check the current configuration using xset:

$ sudo apk add xset $ xset q

Contents of xset q

Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000000
  XKB indicators:
    00: Caps Lock:   off    01: Num Lock:    off    02: Scroll Lock: off
    03: Compose:     off    04: Kana:        off    05: Sleep:       off
    06: Suspend:     off    07: Mute:        off    08: Misc:        off
    09: Mail:        off    10: Charging:    off    11: Shift Lock:  off
    12: Group 2:     off    13: Mouse Keys:  off
  auto repeat delay:  500    repeat rate:  20
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        9fffffffffffffff
                        fff7ffffffffffff
  bell percent:  0    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  600    cycle:  0
Colors:
  default colormap:  0x22    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  /usr/share/fonts/misc,/usr/share/fonts/100dpi:unscaled,/usr/share/fonts/75dpi:unscaled,/usr/share/fonts/misc,/usr/share/fonts/100dpi:unscaled,/usr/share/fonts/75dpi:unscaled,built-ins
DPMS (Energy Star):
  Standby: 600    Suspend: 0    Off: 900
  DPMS is Enabled
  Monitor is On

To disable those timers issue the command:

$ xset dpms 0 0 0

Santiy check:

$ xset q | grep Standby Standby: 0 Suspend: 0 Off: 0