virtualbox.org

Host Jaunty 64-bit, guest Windows7
I upgraded to Virtualbox 3.0 and everything seemed fine.
I updated the Guest Additions, after rebooting windows, I am stuck with an 800x600 display.

Try rebooting the host.
Did you actually see the guest additions install on Win 7RC?
Try installing the guest additions again after you reboot the host.

Also check to see that the auto-resize button is activated (turns blue) in the guest.

Yes, I saw the additions install in Win7
Yes, I tried rebooting the guest, then rebooting the host.
Yes, I tried the auto-resize button several times.
Nothing helped.

After un-installing the guest additions, rebooting the guest, and re-installing the guest additions and rebooting the guest, it seems to work.

Hmmm... Maybe section 9.3 of the user's manual?

--manual copy & paste --
9.13 Configuring the maximum resolution of guests when using the graphical frontend

When guest systems with the Guest Additions installed are started using the graphical frontend (the normal VirtualBox application), they will not be allowed to use screen resolutions greater than the host’s screen size unless the user manually resizes them by dragging the window, switching to fullscreen or seamless mode or sending a video mode hint using VBoxManage. This behavior is what most users will want, but if you have different needs, it is possible to change it by issuing one of the following commands from the command line:
will remove all limits on guest resolutions.
manually specifies a maximum resolution.
restores the default settings. Note that these settings apply globally to all guest systems, not just to a single machine.

--end of manual copy & paste --


After this, use setvideohint like this:
Hope it works!

This technique worked great for me. I have VirtualBox running on Ubuntu 9.04 Server 64-bit in headless mode. My client is an HP t5145 thin client with a Compaq display. The display's max resolution is 1366x768. Odd, but a good, cheap monitor for the kids.

My question: Sometimes, if I have to connect to the VM with a different client (e.g., MS Windows Remote Desktop), the VM's video mode reverts to something like 1021x768. I then have to go back and run the controlvm setvideomodehint command again. Is there a way to make the setvideomodehint permanent? The modifyvm command doesn't offer the setvideomodehint as an option.

I've created a shell script to run quickly in case I have to do so (especially if I don't remember the command), and I can even run it via a command/shortcut from my Windows desktop by installing PuTTY/PLink.

The same problem and that fixed it to me too.

Just one more tip: your Video Card Memory should be at least at 32MB; if not, is possible that you dont get a resolution higher thatn 1280 x 1024.

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