Adafruit PiTFT Touchscreen Display for RPi

[marinahanna]

I've attached a couple of pictures of what happens whenever I run any of those two files (I alsotried the "sudo mv /usr/share/X11/xorg.conf.d/99-fbturbo.conf ~" but that just said that this file didn't exist in the directory). So, I turn on my rpi, and I get the image on the touchscreen, but I also get this image from the HDMI cable.

Whenever I run any of the two files, I get a black screen from the HDMI and I get the first image again, expect it has an error box that says "GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed:An authentication agent already exists for the given subject"

[adafruit2]

if you created the file with:

Section "Device"
Identifier "Adafruit PiTFT"
Driver "fbdev"
Option "fbdev" "/dev/fb1"
EndSection

you have to change
Option "fbdev" "/dev/fb1"
to
Option "fbdev" "/dev/fb0" (thats a zero!)

and reboot, try that

[marinahanna]

That worked! Thank you!

[marinahanna]

Hello, I'm attempting to install the tactile switch buttons to serve as an on/off button. Whenever I click on the button, it turns it off, but after about 10 seconds it turns back on without me clicking the button. How can I fix this?

[adafruit2]

try a different pin?

[marinahanna]

I attempted to use different GPIO pins, but they didn't work either. It will turn off, but immediately turn on right after. Would it have something to do with the fact that I'm using a rechargeable power supply and it might be turning it back on?

Also, whenever I boot to X, it seems that most of the windows open are too big for the screen. Some I can adjust to fit the screen. However, I'm attempting to use a program on it, but am unable to do so because it doesn't fit the screen. Is there anyway of changing the screen resolution? And if so, how would I go about doing that?

[adafruit_support_mike]

Some rechargeable power supplies have built-in circuits to shut off the boost converter if there's no load (or only a light load) across the output. Running the converter while there's no load wastes power.

If your power supply shuts down its converter when it sees the RasPi shut down, then tests the line again a few seconds later, the RasPi will see that as an unplug-and-replug event and force a reboot.

Try running the RasPi from a wall adapter and see if you have the same problem.

[adafruit_support_rick]

Is there anyway of changing the screen resolution?

Unfortunately, no. You can't change it.

[marinahanna]

Well, the reason I ask is because the resolution on the screen says the mode is "592x448", but when purchasing this item I thought that the resolution would be 320x240, not something larger. How can it be that this cannot be changed to fit the original description of the product?

[adafruit2]

Well, the reason I ask is because the resolution on the screen says the mode is "592x448", but when purchasing this item I thought that the resolution would be 320x240, not something larger. How can it be that this cannot be changed to fit the original description of the product?

where does it say 592x448?

[marinahanna]

I typed into the LXTerminal "fbset -s" and it showed mode "592x448". When I connect it through my hdmi cord and type "fbset -s", I get "mode 1312x736".

[adafruit2]

i dont know that fbset is used with FBTFT or how it works. it could be fbset is instead looking at the composite framebuffer. either pay, the PiTFT 2.8" is 320x240 fixed res

[marinahanna]

Okay, I understand. Then, is there any way that I would be able to get the entire screen to fit on the pitft?

[marinahanna]

These are a couple of pictures of the images I see through my monitor and my pitft. I am obviously able to see the entire screen through the hdmi and wondering if there was a way to do this so I can see the full desktop through the pitft.

[adafruit2]

These are a couple of pictures of the images I see through my monitor and my pitft. I am obviously able to see the entire screen through the hdmi and wondering if there was a way to do this so I can see the full desktop through the pitft.

with fbcp it is possible, we don't have tutorial on fbcp but the basic instuctions are here. we haven't used it either, so we have no information or instruction for use with pitft

https://github.com/notro/fbtft/wiki/Fra ... -mirroring