Invisible Sliders, Fields, and Widget in Firefox and others

Vorlon

Somewhere along the line, many of my scrolling sliders and widgets have turned invisible.

I'm running KDE Plasma on an ~AMD64 system.

Now I can't see the scroll sliders in Firefox, and other field borders are invisible. They are actually there and work, but are invisible. This means I can use the mouse to scroll, but I can't see where the slider is.

This does not effect all applications, but it does effect a lot of major ones. For example, Firefox and EasyTag. I've also tried to install firefox-bin, and it gives the same effect.

Dolphin, LibreOffice, and KDE applications work fine.

Anybody have any ideas?
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Casey Bralla
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asturm · Developer Joined: 05 Apr 2007 Posts: 8936

Did you recently upgrade to gtk+-3.20?

Vorlon · Posted: Sat Jul 23, 2016 2:07 pm Post subject:

Yes. I have GTK+ 3.2.

GTK3 USE flag is NOT set, but I see that it is the default for gtk apps under plasma.
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Casey Bralla
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asturm · Developer Joined: 05 Apr 2007 Posts: 8936

GTK+ 3.20 is known to break themes.

Plasma does not set any default, your gtk+ based applications decide over being gtk+2 or 3 based.

Tyler_Durden

Vorlon · Posted: Sat Jul 23, 2016 4:22 pm Post subject:

Tyler, thanks for your suggestion. I've tried it, but I am probably doing something wrong.

I downloaded the gtk.css file from github and put it in /usr/share/themes/Breeze/gtk-3.0. Then I selected Breeze theme from KDE system settings, adn restarted Firefox. No change. I also tried creating /usr/share/themes/Breeze/gtk-3.2 and putting the file ther, but no good.

Where id you put the gtk.css file to make it active?
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Casey Bralla
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Tyler_Durden · Posted: Sat Jul 23, 2016 5:19 pm Post subject:

Vorlon · Posted: Sat Jul 23, 2016 5:53 pm Post subject:

Doh! <sheepishly>I didn't even notice the stoopid instructions (sigh)</sheepish>

OK, I installed the themes, and can change them, but the scroll bar slider is still invisible.

I must have something else screwed up, firefox is goofy. (I've read some traffic on the internet that applications have to be modified to use gtk3+)

Thanks for your help!
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Casey Bralla
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The NerdWorld Organisation

asturm · Developer Joined: 05 Apr 2007 Posts: 8936

franzf · Advocate Joined: 29 Mar 2005 Posts: 4565

Here is a patch to fix the issue:
https://bugs.gentoo.org/show_bug.cgi?id=578326#c17
You can apply it via user-patches. That requires www-client/firefox - it won't work with www-client/firefox-bin.