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+--- Thread: Issues with the Original Raspberry 7'' Touch Display (/showthread.php?tid=146)
Issues with the Original Raspberry 7'' Touch Display - Alpenskipper - 2016-06-18
Hi!
I use the original 7'' Touch display on my boat. Actually, I have several issues with the touch handling and backlight.
1. rightclick
I can't enable the touch rightclick. I tried it with the tutorial from the raspbery foundation https://www.raspberrypi.org/documentation/hardware/display/troubleshooting.md, pasted below.
2. zoom gestures
No zoom gestures possible
3. Backlight handling
I found a program in github to manage the backlight. Unfortunately it is not working. https://github.com/jakeh12/rpi-backlight
The funny thing is, that the touch things were working correctly in an earlier installation. Same with backlight on/off and two-finger zoom in opencpn.
And further more the screen resolution is not detected automatically any more. I have to force it in the config.txt.
Is it possible, that all this is a screen driver problem?
How to test and fix?
best regards,
Martin
HOW DO I ENABLE RIGHT CLICK?
You can emulate a right click with a setting change. Just:
sudo nano /etc/X11/xorg.conf
Paste in:
Section "InputClass"
Identifier "calibration"
Driver "evdev"
MatchProduct "FT5406 memory based driver"
Option "EmulateThirdButton" "1"
Option "EmulateThirdButtonTimeout" "750"
Option "EmulateThirdButtonMoveThreshold" "30"
EndSection
Hit CTRL+X and y to save. Then:
sudo reboot
Once enabled, right click works by pressing and holding the touchscreen and will be activated after a short delay.
Issues with the Original Raspberry 7'' Touch Display - Alpenskipper - 2016-06-19
Meanwhile I can give some answers by myself:
1. this rightclick solution does not work on jessie, only on wheezy. I installed "twofingers", rightclick ist working now.
2. backlight handling with rpi-backlight is running fine. I did sudo apt-get update and upgrade before.
What I am still looking for is a solution for a screensaver, that switches the backlight off after a while. And a finction, that wakes the display up, when touchin the display...
RE: Issues with the Original Raspberry 7'' Touch Display - Sailoog - 2016-06-20
If you have upgraded maybe you have back to the default state for screensaver.
To turn off the screensaver:
edit /etc/kbd/config:
BLANK_TIME=0
POWERDOWN_TIME=0
add to /home/pi/.config/lxsession/LXDE-pi/autostart:
@xset s noblank
@xset s off
@xset -dpms