After searching the Internet for similar problem or even a solution, I have to post my question here in hope that somebody had the same problem and solved it.
My scenario: ESXi5.0 server with Ubuntu Server (AMD64) 10.04.03 LTS (updated) with installed VMware tools. I am using vSphere client to manage the virtual machine and access the console. Unfortunately the console resolution is small and I would like to increase it to 1024x768x16.
I have tried every possible "solution" published online (that I've found). As soon as the GRUB2 entry holds "set gfxpayload=keep" afterwards I get a blank screen.
I am sure that I am missing some driver that I need to load (initram or somewhere else). Thank you for any hint in the right direction... vSphere client is used on Windows platform (Windows 7 and Windows 2003 Server).