I have the wallch program configured to refer to a large directory of images and to change the image every twelve hours. I find that after every reboot, wallch reverts to its default behavior of showing images from a small built-in set, with a much smaller interval. To get the intended behavior, after every reboot I need to open the wallch window, change the "Interval" to 12 hours, then click the "Next" button, to get it to immediately choose an image from my folder. Then everything is fine, until the next reboot.
How can I get consistent behavior across reboots? I'm using Ubuntu 20.04.
If it matters, the default set of images is the same one I see when I open Ubuntu's "Settings" interface, in the "Background" tab. Also, wallch is set to be run at startup, if that wasn't clear.
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