Might this be related? https://bugzilla.redhat.com/show_bug.cgi?id=1306841

On 10/27/2016 08:51 AM, Valentin B wrote:
> 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!