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adafruit / Adafruit-PiTFT-Helper

Script to configure an installed PiTFT
MIT License
82 stars 26 forks source link

PiTFT 28c console works, startx = blank screen, HDMI output ok #6

Closed giantmolecules closed 9 years ago

giantmolecules commented 9 years ago

I have two identical Raspberry Pi 2 Setups, both with the latest noobs distro and PiTFT capactitive touchscreens. I followed the instructions here for setting up adafruit-pitft-helper, and the first one worked fine. The second one, following all the same steps as the first, won't display the desktop if I startx from the console. (i do have console enabled on both machines). All I see on this one is a black screen with a short white line. Any suggestions

brennen commented 9 years ago

As a first sanity check, can you see what the value of FRAMEBUFFER on the second Pi is? echo $FRAMEBUFFER should get this.

Or, actually, howsabout just a dump of everything you get by running env if you can.

You might also check if /usr/share/X11/xorg.conf.d/99-fbturbo.conf has been moved aside (the script should just have moved it to /home/pi).

giantmolecules commented 9 years ago

ok, on Pi1, echo $FRAMEBUFFER gives me /dev/fb1. on Pi2, nothing is echoed. 99-fbturbo.conf is located in /home/pi on both Pi's

brennen commented 9 years ago

Ok, so have a look in /home/pi/.profile (or /home/[YOUR USERNAME HERE/.profile, really), and see if you've got:

export FRAMEBUFFER=/dev/fb1

If not, add it and see what happens. If so, maybe .profile isn't getting executed. You could throw that line in .bashrc instead and see what happens...

giantmolecules commented 9 years ago

lovely! Pi2 did not have export FRAMEBUFFER=/dev/fb1 at the end of .profile like Pi1. Now both work! Thanks very much for your help and patience! BTW, these were both fresh installs, nothing other was done to them other than adding the adafruit repository and installing adafruit-pitft-helper...

brennen commented 9 years ago

Thanks very much for your help and patience!

Any time! Glad that was an easy fix. It does seem like occasionally the helper script is failing there for some reason; I'll add an extra check-and-warning for the presence of that line.