I installed Xubuntu yesterday and made some changes to my desktop, its original xfce, i installed Docky and i've read about bluring, needs Compiz, so i've installed an older version that has Blur Plug-in. I edited it a bit and Enabled it.

Now, when i for example want to start compiz, it starts, some features like Woobly windows work but the blur on Docky does not plus i get lost Minimize\Maximize\Close buttons and i cant drag windows, without pressing ALT..

Does anybody know any solution to these issues?

When i type in terminal compiz --replace i get this output:

/usr/share/themes/xosemite-gtk/gtk-2.0/gtkrc:561: Unable to locate image file in pixmap_path: "Scrollbars/slider-horizontal-active.png"
/usr/share/themes/xosemite-gtk/gtk-2.0/gtkrc:565: Background image options specified without filename
Segmentation fault

When i type in terminal xfwm4 --replace i get my Buttons back but of course without animations, effects and this output:

/usr/share/themes/xosemite-gtk/gtk-2.0/gtkrc:561: Unable to locate image file in pixmap_path: "Scrollbars/slider-horizontal-active.png"
/usr/share/themes/xosemite-gtk/gtk-2.0/gtkrc:565: Background image options specified without filename
Waiting for current window manager (compiz) on screen :0.0 to exit: Done

(xfwm4:3622): xfwm4-WARNING **: Cannot read Pixmap header
(xfwm4:3622): xfwm4-WARNING **: Cannot read Pixmap header

Sry for my bad English :D

** Edit: Bluring doesnt really matter, i just want solution to these buttons

  • where did you get the theme from? and which compiz you installed? – Anwar Sep 4 '16 at 15:41
  • From DeviantART, an older version of Compiz that is compatible with Blur plugin, i think it's 0.8.12 – mihajlo kaurin Sep 4 '16 at 15:53
  • Which xubuntu version are you using? – Anwar Sep 4 '16 at 15:53
  • The latest one 16.04 * If i for example change another style that came with Xubuntu, and run compiz --replace i get only Segmentation fault, without these unable to locate image... – mihajlo kaurin Sep 4 '16 at 15:54
  • why do you need blur feature? docky should work with latest compiz – Anwar Sep 4 '16 at 15:57

You are using an older version of Compiz with Newer Xubuntu. The latest version of compiz is 1: where you installed 0.8. I don't know how you installed that version.

Xubuntu works fine with Compiz latest. But you have to enable some plugins after first use. To tweak plugins, I highly recommend ccsm.

  1. Install it with

    sudo apt install compizconfig-settings-manager

    I also recommend upgrading compiz. This will do it.

    sudo apt install compiz
  2. Now open it using ccsm command in app finder or searching it in menu.

    Enable these plugins

    • Composite
    • OpenGL
    • Animations
    • Window Decoration (it will enable the buttons and title for windows)
    • Maximumize
    • Move Window (This will enable you to move window with mouse)
    • Scale (If you like it)
    • Place windows
    • Application Switcher (to use alt-tab window switching)

    You can also enable other plugins as well. But above are necessary

I also recommend changing the theme. From its DeviantArt page, I saw the theme is very outdated and only has gtk-2.0 themeing. They don't even include gtk-3.0 theme.

If you like xosemite, you'd like macbuntu theme. Install these instead of that one. You can get the installation instruction here

  • Ok i will now see that theme and download newer version of compiz, but again to mention... Blur plugin doesn't work in latest version, that is why i downgraded to 0.8 :D ... Thanks so much for taking your time to help me – mihajlo kaurin Sep 4 '16 at 16:19
  • Apparently i installed new version of compiz now i cant get past xubuntu loading, before i rebooted pc and went into terminal and type ccsm it said Segmentation Fault – mihajlo kaurin Sep 4 '16 at 17:02
  • what do you mean by xubuntu loading? can you login to the desktop? remove the ~/.compiz, ~/.config/compiz-1 folders – Anwar Sep 4 '16 at 17:31
  • OS wont boot and its probably not caused by compiz but i also cant boot live cd or install new fresh Xubuntu... error msg says Unable to mount root fs on unknown block 2,0 – mihajlo kaurin Sep 4 '16 at 17:36
  • @mihajlokaurin oops! It seems somehow your harddrive got some problem!! don't know what you were doing? what that happend? – Anwar Sep 4 '16 at 17:37
/usr/share/themes/xosemite-gtk/gtk-2.0/gtkrc:561: Unable to locate image file in pixmap_path: "Scrollbars/slider-horizontal-active.png"
/usr/share/themes/xosemite-gtk/gtk-2.0/gtkrc:565: Background image options specified without filename

I found that the image was called Scrollbars/slider-horizontal-active (2).png and once I renamed it to Scrollbars/slider-horizontal-active.png the warning went away, but that was in xfce not compiz.


I'm using compiz with xubuntu 17.04 with greybird theme. If you've got the theme working for your window decorations but you don't have minimize and maximize buttons in your window titles you can fix it like this: install gnome-tweak-tool with your preferred installation method.

start it from a terminal Go to Windows and turn on the two Titlebar button options.

enter image description here

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