On the Azteeg X5, several people have reported that powering a GLCD from the on-board 5V supply causes similar problems. Mine was a coin toss as to whether it would display the Smoothie banner or gibberish. Even if it did boot clean, it would change to gibberish after a few minutes. The recommended fix is to power the GLCD from an external 5V source. I got away with changing the board from internal 5V to use USB 5V and my display has worked non-stop for a few months.
In any case, I'm guessing that you are also experiencing weak 5V power to the GLCD, and tapping an alternative 5V power supply will fix it.
Now, I'm wondering if your theory of the 5V rise time being slow might be a factor in the Azteeg's issues with the GLCD, and if inserting a small delay in Smoothieware before initializing the GLCD on boot might resolve bot your and the Azteeg's problems?????
In any case, I'm guessing that you are also experiencing weak 5V power to the GLCD, and tapping an alternative 5V power supply will fix it.
Now, I'm wondering if your theory of the 5V rise time being slow might be a factor in the Azteeg's issues with the GLCD, and if inserting a small delay in Smoothieware before initializing the GLCD on boot might resolve bot your and the Azteeg's problems?????