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buglabs / android

This is the top-level git repo for the Android on BUG 2.0 project. Refer to the start page for further details:
http://buglabs.github.com/android/
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BUG LCD Module does not work on boot #1

Closed kgilmer closed 13 years ago

kgilmer commented 13 years ago

When booting Android VDZ, BUG LCD screen does not turn on after boot completes.

STR:

  1. boot VDZ on BUG 20 w/ LCD module
  2. Note no display on LCD
kgilmer commented 13 years ago

The work-around for this, as documented on the wiki build page (http://wiki.buglabs.net/index.php/Experimental:Building_Android_image_for_BUG_YT):

With certain pre-production bug2.0 boards and LCD PIMs it is possible that the PIM is not properly powered up. A workaround for this is to:

  • boot the device with the video PIM connected to it (make sure the kernel does not complain about EEPROM trouble)
  • set the video PIM into VGA mode (regardless of whether there is something connected to the connector or not) by issueing: echo "vga" > /sys/bus/bmi/devices/bmi-dev-1/vmode
  • replace the video PIM with the LCD PIM now
  • wait until you see something that looks like the Android desktop on the LCD (to make sure you're not interrupting the application installation process)
  • run ''reboot'' from the terminal
kgilmer commented 13 years ago

Matt Isaacs fixed this. Confirmed as of build 52. See commit 9b4a58a379693ae521d6de2e1782b77de878fab4