Hi, On a machine with the intel integrated card, more specifically 00:02.0 VGA compatible controller: Intel Corporation Sky Lake Integrated Graphics (rev 06) seem to be some issues with recognizing the monitor properties. Running `xrandr` the following output is displayed: xrandr: Failed to get size of gamma for output default Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768 default connected primary 1024x768+0+0 0mm x 0mm 1024x768 76.00* I've managed to solve the problem using the following steps as also explained here: http://www.linuxquestions.org/questions/centos-111/cannot-change-screen-resolution-on-unknown-display-in-centos7-4175583712/ rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm yum install yum-plugin-fastestmirror yum --enablerepo=elrepo-kernel install kernel-ml I actually would like to avoid using kernel-ml since this doesn't provide any warranty concerning security and system stability in general. Has anyone been able to solve the problem differently? Thanks! -- Valentin Bajrami Kapteyn Astronomical Institute University of Groningen Postbus 800 NL-9700 AV Groningen The Netherlands Phone: +31-(0)50-3634068 PGP Fingerprint: 50D7 E233 C2E0 1C81 BB7F F8D8 E51B CF89 A52E 5271