Garbled LCD screens

[printbus]

Evolution of Marlin took a different approach to the garbled LCD screens that negates the need for the fix proposed here. I don't know when it was changed in Marlin, but the Sept 28 2014 MakerFarm dacb fork now calls the lcd_implementation_init() whenever the printer is displaying the status screen and the LCD panel button is pressed. So, the display recovery occurs as soon as you press the button - you don't have to wait for the display to timeout before the LCD interface is reinitialized like my fix did. The additional delay spent reinitializing the interface before the top menu comes up isn't significant.

So, if you get the garbled LCD display on your printer with a fairly current version of Marlin, you can either just press the knob on the panel or you can insert/eject the SD card.