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I'm using Xubuntu 14.04, after changing display from external screen to internal in my laptop my Firefox window get a little bit transparent.

The only one window which I set to have transparency is "xfce4-terminal 0.6.3", by it's own configuration. I didn't play with transparency of any other programs or system settings, if there is any.

The same kind of strange transparency has been before few times with Nautilus window.

Transparent firefox window so we can see wallpaper under it

Why is it happen? Where can I adjust and play with these settings of transparency, or is it just a strange bug? If so, where and how can I report this bug?

After reboot everything goes back to normal.

3 Answers 3

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Looks like a bug, but you can try to play with this Settings:

enter image description here

You can report a bug here https://bugzilla.xfce.org/buglist.cgi?component=Decorations&product=Xfwm4&resolution=---

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I do believe that is not a bug , but a feature in xfce where , when you scroll down on the titlebar of a window , the opacity of the window decreases .

To revert this just scroll up on the title bar to increase opacity.

Hope it helps. !!

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Thank you for reporting that.

I have had this problem two (maybe three) times.

Though unsure, I think something flickered when problem occurred. It's so quick and unexpected it's hard to tell what happened. May look like when xfwm is restarted (unsure). Anyway:

  • The first time I worked around it by closing the affected window.
  • The second time closing the window was not an option. I opened a terminal and typed

    xfwm4 --replace &

You may just press Alt-F2 and type xfwm4 --replace there.

The first time, I wondered if I Accidentally some key shortcut I was unaware of.

Tuknutx may be right in suspecting a bug in xfwm.

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