I've installed Debian Wheezy on VirtualBox 4.1.12 (running in Ubuntu 12.04) and have troubles setting the video mode.
vga=xxx isn't possible anymore, instead, the video mode should be set using GRUB. In
/etc/default/grub I set
GRUB_GFXMODE=1024x768 and that works, but when I select to boot Debian, it switches back to text mode 80x25. Setting
1024x768 didn't help.
Any ideas how I could achieve my goal?