Some windows lose opacity in Beryl

There’s a small incompatibility in Beryl which causes certain program windows to appear translucent or transparent.

A simple fix for this is to

  • Open up the Beryl Settings manager
  • Click Windows Management
  • Enable and select the WIndow Specific Settings option
  • Under the Rules tab, expand Disable ARGB Visual, and click Add (the + button).
  • Select Class Name in the list, click Grab and click on the window that is causing problems.
  • Click ‘OK’

You should see something appear in the Disable ARGB Visual list like


In this case, I was having trouble with the terminal server client programs running in more than 256 colours.

You may need to reload Beryl for this to apply properly.