On Thu, 21 Jun 2018 11:20:52 +1200, Datalus wrote:

> Hi everyone I'm trying to figure out how I can have my cake and eat it
> to, I have a 3.5 inch touch screen and i had it working but I cant use
> the hdmi when i hookup the monitor. Id like to be able to use both. I'm
> trying to make my Pi mobile but to do updates Id like to use my 19"
> monitor. Once having the 3.5 screen I cant get back into the hdmi I had
> to reload the pi there must be a way to have both! Any Idea's. I'm not a
> programmer so I need a programmer to help tried a bunch of changes in
> config.txt but didn't work. Thanks Sam

From what you've said, I gather you have a 3.5 that plugs onto the gpio
pins.
It would seem to me that your best choices would be to use one hdmi
display and the pi 7 inch DPI touch monitor; try to hookup to the
composite video output (which limits resolution); or replace your current
3.5 with a small hdmi (I have a 5" hdmi touch screen) and use an hdmi
splitter or swap hdmi units.

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