2

For two displays, you could just define the optimal resolution/dpi for each device, and make a script which detects which display is connected, and set the desired resolution/dpi using xrandr with --mode, --dpi and --scale parameters. For a general solution, check if xrandr | grep connected or sudo get-edid | parse-edid | grep DisplaySize report the correct ...


2

The closest I can think off is to use the [EDID=*] filter in config.txt BUT this only operates a boot time. Full documentation is here but in simple terms: Run tvservice -n from the command line for with monitors to ID the monitor Add a section for each monitor in config.txt that sets the correct monitor mode: [EDID=MonitorID] hdmi_group=X hdmi_mode=XX ...


1

Download matchbox-keyboard and matchbox-keyboard-im packages (link for Raspbian, if you have Buster, you need .deb files version 0.2 dated 28-Jun-2020). Write installation commands in a text file, e.g.: cd /boot sudo dpkg -i matchbox* <- don't forget the newline after the last command Put the packages and the text file on the FAT partition of the SD card ...


1

I tried two different ones: matchbox-keyboard and florence. You will need a connected USB keyboard to be able to try them. Otherwise, use an SSH connection. Open a "Terminal" and type sudo apt install matchbox-keyboard. You will find it installed under "Accessories" with the name "Keyboard". In my opinion, florence is better and ...


1

I had a similar issue. My script calls the serial ports ttyACM* and I use .config/lxsession/LXDE-pi/autostart to launch it at startup. As I was having problems with this approach, I checked the .cache/lxsesion/LXDE-pi/rpi.log and I found out my script was not able to open the serial port only at startup, right after boot. It was not a matter of permissions ...


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