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So I'm trying to configure the resolution of my CentOS 6.5 virtualbox. Here are the steps I have taken:

Installed guest additions
Changed virtualbox preferences > Display > Maximum Guest Screen Size: Hint (Width 1920, height 1080)
Restarted VirtualBox System > Preferences > Display only shows 1024x768 and lower as possible resolutions.

I had also tried editing /etc/X11/xorg.conf to include the following:

Section "Screen" Depth 24 SubSection "Display" Depth 24 Modes "1920x1080" EndSubSection EndSection

However changing this caused box to crash to a black window with "CentOS 6.5" printed. It would let me type but would not let me run commands; hitting enter returned a newline but no actions. There was no prompt.

I've also seen instructions to run a command changing the MaxGuestOSResolution (or something) in my host terminal, but I'm hosting on windows so that isn't an option.

Is there something I'm overlooking? I've done a lot of google searching but nothing has given me the option to increase the resolution. I've also taken a couple steps that I didn't list here, but I can't remember them all.

Thanks in advance.

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Virtualbox guest additions installed too? There's a graphics driver attached to that. –  Nathan C May 6 '14 at 15:18
@NathanC how do I manipulate that driver? I haven't seen any settings that would help me but I might be looking in the wrong places. –  Devon Parsons May 6 '14 at 15:20
Once you install the actual extensions (using the menu) and reboot the VM, they'll automatically be enabled. Also make sure you're allocating enough video memory to the VM for a high resolution (I normally max it out unless it's a server). –  Nathan C May 6 '14 at 15:20
@NathanC I have allocated 128mb for the vm video memory, which is the max vbox allowed. And I have rebooted the VM since installing vbox guest additions, but like I said it did not give me any more options for resolution. Is there somewhere for me to check the driver settings? I'm unfamiliar with CentOS. –  Devon Parsons May 6 '14 at 15:23
It sounds like you may be out of luck ...CentOS 6.x doesn't like the drivers that come with virtualbox it seems. –  Nathan C May 6 '14 at 15:25

1 Answer 1

up vote 1 down vote accepted

A co-worked found a solution to this problem. It would be hard to pinpoint all the environment settings changed since I first got the VM, but hopefully this will be enough:

  1. Have guest additions installed (for either Virtualbox or VMware, whatever you're using).
  2. DELETE the file /etc/X11/xorg.conf (or to be safer, mv it to /etc/X11/xorg.conf.unused or something)

This opened up a huge range of resolutions for me, and among them 1920 x 1080. Hopefully this helps other people too.

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