Hi, I'm having a very weird problem with CentOS as a VirtualBox guest. Let me explain it step by step. tl;dr: I can install VirtualBox Guest Additions and configure a fullscreen 1280x1024 graphical resolution on a full install, but not on a reduced install with a lightweight window manager. Here's what I did. 1. Install vanilla CentOS 7 with KDE. 2. Boot to reduced 1024x768 resolution. 3. Install gcc, make and kernel-devel. 4. Build VirtualBox Guest Additions. 5. Reboot to full 1280x1024 resolution. ==> perfect On a vanilla desktop installation, this works perfectly. Now here's my second attempt. 1. Install minimal CentOS 7. 2. Install X11: yum groupinstall "X Window System" 3. Install WindowMaker from Nux repo. 4. Launch WindowMaker (startx) to reduced 1024x768 resolution. 5. Install gcc, make and kernel-devel. 6. Build VirtualBox Guest Additions. 7. Reboot and still have a reduced 1024x768 resolution. ==> meh I made another attempt with Xfce instead of WindowMaker (yum autoremove WindowMaker && yum groupinstall Xfce), but with the same result. Any idea what's going on here? Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info at microlinux.fr Tél. : 04 66 63 10 32