Ubuntu 10.10: Mimo UM-720S single screen setup

I recently needed to temporarily put a screen on a completely headless system (no graphics card installed), so I decided to use a MIMO UM-720s which was lying around (almost literally).

Naturally, was not as easy at it initially seemed...

First of all, this guide is heavily based on the one written by Andrew Simpson, which can be found here.

SECTION A: Getting it to work

Projector RS-232 Commands

This is a quick list of RS232 control commands for projectors.
The command list is by for not exclusive, but the most common ones should be listed.

If a projector model is not in the list, try any other codes from the same brand. They usually work.

Desire Z Modaco Rom r2 and protected Market applications.

After installing r2 of Paul's Desire Z ROM, I noticed that I could no longer find or download applications from the Market if they have their Protected flag set

To fix this, you need to use adb to pull the build.prop (a type of ini file for Android, containing information about the ROM) to your PC and change one line.

So in a command line, type the following:

 adb -d remount  
 adb -d pull /system/build.prop   

This will download the build.prop file from your phone to the current directory. Use a text editor (like notepad++) to open the file and change the following line:

 ro.build.fingerprint=htc_wwe/htc_vision/vision/vision:2.2.1/FRG83D/296256:userdebug/test-keys 

to this:

 ro.build.fingerprint=tmobile/htc_vision/vision/vision:2.2/FRF91/277427:user/release-keys

be careful not to change anything else.

Then push it back to the phone and reboot it, by typing:

 adb -d push build.prop /system/build.prop   
 adb -d reboot   

After this, you should be able to see protected applications in the market.

If you make a mistake while editing build.prop and something gets messed up, simply reflash the ROM.

R4i SDHC Card Problems and Solutions

I recently started having problems with my R4i SDHC cartridge, after changing the MicroSD card. The problems started when I swapped my old 2GB card to a SDHC one.

It would act slowly, corrupt save games and display "Savfile not founded! [sic]" message when some games are loaded.

To solve it, I did the following:

1. Copy all ROMs to the desktop.
2. Reformat the card using the Panasonic SD Formatter (http://panasonic.jp/support/global/cs/sd/download/index.html). I used version 2.0, with the default settings.
3. Replaced the spaces of the ROMs and .sav files with underscores ('_').
4. Copied everything back to the newly formatted card.
5. Updated the R4i's kernel (check their website). 

A couple of ROMs still failed to load (complaining about the Savfile), but once I moved to the root of the card, they were fine.


For the record, I use the R4i to mostly to write homebrew apps, and I do own the original cartridges of any ROMs I have loaded on it.

For the current (at the time of this writing) status flashcard legality, read here: http://www.bbc.co.uk/news/technology-10790835