Hello,
Attempted on both OL7 and RHEL7 to use a text-based kickstart to set the Server Desktop GUI on reboot to a larger size than 800x600 default. The following errors with: --resolution is not an option

Kickstart (Shortened here for relevance only portion to save space.)
<%#
kind: provision
name: Kickstart default
install
<%= @mediapath %><%= proxy_string %>
lang <%= @host.params['lang'] || 'en_US.UTF-8' %>
selinux --<%= @host.params['selinux'] || 'disabled' %>
keyboard <%= @host.params['keyboard'] || 'us' %>
#skipx

text
xconfig --startxonboot --resolution=1280x800
reboot

Research shows this parameter appears to be obsolete.

I want to be able to set the GUI Desktop to 1280x800 using kickstart after it completes and boots into GUI in our newly created VM.

What would be the best option? xrandr -s 1280x800 is an option but haven't been able to get it working correctly within kickstart.

Any help would be appreciated.

Shawn

Opened a service ticket to RedHat support and as of today, have offered no solution.

I resolved by band-aid and not the best solution, but it can work.
For those attempting to use a Kickstart with 'text' non-graphic based installation, there is no way to use xconfig or monitor that I am aware of for the newer versions 6.1x+ of RHEL or OL. Instead, do the following:

New out of the box RHEL/OL installs will use auto detect feature and install a generic driver that should work on most systems.
Verify your video card supported resolution sizes (ie 1280x800, 1024x768, etc)
Verify, if using VMWare, your video card chosen supported resolution sizes (ie. 1900x1200, 1280x800, etc)
Match these two and choose the default size you wish have your Post Kickstart Install Gnome GUI Desktop to be. (I chose 1280x800)
Use a site like this to reference charts on what number to be used:
https://en.wikipedia.org/wiki/VESA_B...o_mode_numbers

Within your kickstart file:
On the bootloader line - add the vga=795 or the number of your choosing
Line will look similar to this:
bootloader --location=mbr --append="<%= @host.params['bootloader-append'] || 'nofb quiet splash=quiet vga=795' %>" <%= grub_pass %>

When kickstart is done, your GUI should boot using the default kernel with the new grub2.conf parameter added as per bootloader command above.