* Peter Falter sowosama@gmail.com [Fri Mar 12, 2010 at 12:28:54PM +0100]:

i am constrained to use M$ XP in a training course, but allowed to have Virtualbox.

So i took a daily snapshot with debian/sid flavour, 2.6.33 kernel, started succesfully, installed to HD and booted several times. I am not able to change the screenresolution by kernel commandline vga=792.

I downloaded 2009.10 too, it starts with vga=791 and the size looks good.

[...]

Looks like 2.6.33 gives me no framebuffer device. Can you help me to get a decent screensize?

* Peter Falter sowosama@gmail.com [Fri Mar 12, 2010 at 03:33:02PM +0100]:

it doesnt depend on the kernel version. My second VM with grml 2009.10 kernel 2.6.31 only had the first time started a /dev/fb0 and a decent screenresolution. After grml2hd and reboot i put vga=792 by hand in the grub2 commandline - not in a grub configuaration file! - manually by hand! - there is no /dev/fb0, screen is small.

So please help me, how do i configure a working framebuffer?

IIRC you were the one on IRC who brought up this issue. JFTR, we resolved it through:

insmod gfxterm insmod vbe

and

set gfxpayload=1024x768 in grub configuration. It's a grub2 specific issue. grub2 >=1.98-1 introduces a new option named GRUB_GFXPAYLOAD_LINUX, btw.

regards, -mika-