Archive for July 12th, 2011

VirtualBox and greater screen resolution on the Guest

Tuesday, July 12th, 2011

If you’re in the automation field and work with Siemens WinCC software, you have most certainly got projects with different screen resolutions; and screen resolutions are chosen and fixed on the design side. Wich means that if you have to work on a project in a computer with a smaller resolution, you simply can’t see all of the WinCC runtime screen.

Nowadays, I work from my MacBookPro and virtualize Windows and Linux everytime I need them for testing. This is also a very confortable way of dealing with these Windows-only situations like WinCC, but if you’re on VirtualBox and need a higher resolution to work with WinCC (1280×1024 in my case), you’re in trouble. That’s because by default VirtualBox does not allow the guest Windows to pick a resolution greater than the host OS’s.

There is a simple solution, although a bit burried in the manual: just copy-paste this into the terminal:

VBoxManage setextradata global GUI/MaxGuestResolution any

, and suddenly (well, after a guest OS reboot) you can pick humongous resolutions if you want. Then, activate the Scale Mode (Host key + G) and away you go!