Machine shuts down after setting graphics mode

[HENRYMARTIN5]

This is my current kernel main function:

extern crate vga;
use vga::colors::Color16;
use vga::writers::{Graphics640x480x16, GraphicsWriter};

#[no_mangle]
pub fn kmain()
{	
	log!("Booted!");
	let mode = Graphics640x480x16::new();
	log!("Created graphics mode");
	mode.set_mode();
	log!("Set graphics mode");
	mode.clear_screen(Color16::White);
	log!("Cleared screen");
	for (offset, character) in "Hello World!".chars().enumerate() {
		log!("Drawing character");
		mode.draw_character(270 + offset * 8, 72, character, Color16::Black)
	}
	loop {} // If we exit, the machine shuts down - we don't want that, so we loop forever
}

Before adding the vga crate, the system would boot and then hang at the loop at the end of the function - but now it seems to be rebooting repeatedly as you can see in the screenshot of the output below:

I'm not quite sure what the issue is - I'm following everything exactly as it is in the README. If you need to see more of the source, please let me know.

Edit: I also tested with text mode, and the same thing was happening: Everything was working right up to the point where I call text_mode.set_mode().

[archief2910]

can i work on this issue?

[HENRYMARTIN5]

can i work on this issue?

If you want, but at this point I've given up.