Certain applets aren't compatible with transparent image background
Submitted by Jimi Bove
Assigned to Nick Schermer
Created attachment 5789 intended image background for the panel
I'm about to also attach the screenshot of my panel when I apply that background image.
So, I wanted to have a background image that's transparent EXCEPT in places where I want to be able to read--namely the bottom of my panel. I switch wallpapers every 5 minutes, and some of them make that text unreadable. The problem is, the transparent background I made only appears under certain widgets. After a lot of trial and error, I've determined that it doesn't display when it's under one of the following applets (out of the ones I happen to use): Disk Performance Monitor, System Load Monitor, Network Monitor, Sensor plugin, and the CPU Frequency Monitor. Interestingly, it works with the Sensor plugin when I set to to display "tachos" rather than a temperature.
As you can see, in my current setup, the image is only appearing under the clock applet, since that's the only applet I have in that section of the image that works with it. If I move the clock applet around, I can see the full image as bits and pieces, including its gradient to full transparency. It's all very smooth, but only with the clock applet.