we've seen that some display don't work properly when running Ubuntu/Linaro release. It seems to be an issue related to EDID. Some display report bogus EDID and won't work fine. Typically you are loosing the top and bottom pixels.
we've built a new boot image that contains built-in, hardcoded, EDID to avoid reading the bogus EDID on the monitor.
Note that Android kernel ignores EDID, that explains why the issue is specific to Linux release.
You can download the boot image here:
So to use this file, you have 2 methods.
- flash with fastboot
assuming you've already installed Linaro on the board, you can boot into 'fastboot' mode:
- power off
- press the Vol+ button while you power on
- connect to you PC using micro USB cable
You should now be in 'fastboot' mode, and on you PC, you can run:
and it should report a device, such as:
$ fastboot devices
Now, you can run:
fastboot flash boot boot-edid-1280x1024.img
- modify the SD card , and reinstall
If you are not familiar with fastboot, or if option 1 failed, then you can insert the SD card on your PC , you will see a partition with 'OS' label, and in there you can replace the file:
OS/ubuntu/boot.img with the file you just downloaded, e.g.
cp boot-edid-1280x1024.img xxx/ubuntu/boot.img
Now you can re-install the Ubuntu/Linaro using the SD card.