Running QDMR flatpak

[hmatuschek]

Starting with 0.14.0, a github action builds a flatpack with every release. This would provide an easy way to publish qdmr across different distributions. Flatpak however sandboxes applications and for the time beeing, there is no way flatpak allows QSerialPort to enumerate existing serial interfaces.

[hmatuschek]

Uh, got it. The problem is flatpaks inability to provide a proper udev support. They do provide a crippled one. So the udev device enumeration succeeds with no result. Consequently QSerialPort does not find any port and does not fall back onto the sysfs enumeration, which works under flatpak. Therefore you need to prevent Qt from attempting udev device enumeration. This can be done with a environment variable. Future releases of qdmr will include it by default. (i.e., 0.15.0 and later)

For earlier releases, consider adding it to the runtime of qdmr:

flatpak override --user --env="QT_SERIALPORT_SKIP_UDEV_LOOKUP=1" de.darc.dm3mat.qdmr

Omit the --user option if you want to add the environment variable for all users.