Qball's Weblog


Tags Rofi  SimpleSwitcher 

A small post with some updates. I know I have been very bad at blogging lately, luckily nobody reads this anyway.

RIP SimpleSwitcher, long live Rofi

To avoid confusion with the original simpleswitcher I decided to rename it. After getting no useful suggestions and forgetting even more. I decided on ‘Rofi’, it is Icelandic for ‘switch’ or ‘switcher’. Mostly it is nice, short and unused.


Not a lot changed since the last blog post, given it is already perfect(ish):

UDOO Quad, second attempt at low power always on desktop.

Hearing that the Freescale i.MX6 are well supported and have well working X drivers (Vivante), I decided to get one. There are many interesting on the market, but this one is combined with a Arduino DUE allowing for some creative projects.


  1. Freescale i.MX 6 ARM Cortex-A9 CPU Quad core 1GHz
  2. Integrated graphics, each processor provides 3 separated accelerators for 2D, OpenGL® ES2.0 3D and OpenVG™
  3. Atmel SAM3X8E ARM Cortex-M3 CPU (same as Arduino Due)
  4. RAM DDR3 1GB
  5. 76 fully available GPIO
  6. Arduino-compatible R3 1.0 pinout
  7. HDMI and LVDS + Touch (I2C signals)
  8. Ethernet RJ45 (10/100/1000 MBit)
  9. WiFi Module
  10. Mini USB and Mini USB OTG
  11. USB type A (x2) and USB connector (requires a specific wire)
  12. Analog Audio and Mic
  13. SATA (Only Quad-Core version)
  14. Camera connection
  15. Micro SD (boot device)
  16. Power Supply 12V and External Battery connector

The choice of hooking up the GPIO pins of the Cortex-M3 and the Freescale to the same output pins without any protection is a bit odd. While it probably makes things a lot easier, it does require to take extra care, so you do not connect two outputs.


So far things are working well, still playing to find the most useful distribution to run on it. The Ubuntu 12.04 it ships with is decent enough, but has a few annoying kernel bugs, on Archlinux I got stuck with X11. Now I am currently using a community debian image, with self-compiled u-boot and kernel. I gave the board a 120GB samsung EVO SSD that is connected up via SATA. This is a welcome performance boost I was always missing on other boards, combine this with gigabit Ethernet it is a speedy little machine.

Currently I have it runnig idle at 3.5W power consumption, this is not bad but I am sure I can probably get it down to 2.5-3W (from the Wall socket). This should be low enough to keep it running, given it is powered by 12V I can have it running from the 5V/12V power line I have that feeds more arm boards, powered USB hubs and dimmable LED strips. This should be even more efficient.

Other stuff:

I will reserve the rest for more blog posts.

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