U8GLIB: sleepOn/Off not working

Using Arduino Displays
1

I'm using the "SainSmart 12864 128x64 Graphic Blue LCD Display Module Backlight For Arduino UNO R3 Duemilanove MEGA2560 MEGA1280 AVR" with the Mega 2560 and the display works fine but u8g.sleepOn() does not work. Does anyone have any suggestions on what to do to get it to work?

I'm using v1.11 of the U8GLIB which is suppose to have support for sleepOn/Off.

If I put a power transistor between the mega's +5v and Vcc on the display to turn it on and off will that damage the display with SDA and SCL lines still active?

2

These sleep functions are only available for some display types. What is your exact constructor line?

If I put a power transistor between the mega's +5v and Vcc on the display to turn it on and off will that damage the display with SDA and SCL lines still active?

Probably not, but you need to reinit the display. You can use u8g.begin() for this. All other settings are also lost...

Oliver