And this one should help in case Linux can't display anything after GRUB
transfers control to it.
--
Robert Millan
The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
how) you may access your data; but nobody's threatening your freedom: we
still allow you to remove your data and not access it at all."
Index: loader/i386/linux.c
===================================================================
--- loader/i386/linux.c (revision 2375)
+++ loader/i386/linux.c (working copy)
@@ -541,6 +540,31 @@
params->video_cursor_y = grub_getxy () & 0xff;
}
+ grub_printf ("screen_info dump:\n");
+ grub_printf ("orig_x = 0x%x, orig_y = 0x%x\n", params->video_cursor_x, params->video_cursor_y);
+ grub_printf ("ext_mem_k = 0x%x\n", params->ext_mem);
+ grub_printf ("orig_video_page = 0x%x\n", params->video_page);
+ grub_printf ("orig_video_mode = 0x%x\n", params->video_mode);
+ grub_printf ("orig_video_cols = 0x%x\n", params->video_width);
+ grub_printf ("orig_video_ega_bx = 0x%x\n", params->video_ega_bx);
+ grub_printf ("orig_video_lines = 0x%x\n", params->video_height);
+ grub_printf ("orig_video_isVGA = 0x%x\n", params->have_vga);
+ grub_printf ("orig_video_points = 0x%x\n", params->font_size);
+ grub_printf ("lfb_width / lfb_height / lfb_depth = %dx%dx%d\n", params->lfb_width, params->lfb_height, params->lfb_depth);
+ grub_printf ("lfb_base = 0x%x, lfb_size = 0x%x\n", params->lfb_base, params->lfb_size);
+ grub_printf ("cl_magic = 0x%x, cl_offset = 0x%x\n", params->cl_magic, params->cl_offset);
+ grub_printf ("lfb_linelength = 0x%x\n", params->lfb_line_len);
+ grub_printf ("red_size = 0x%x, red_pos = 0x%x\n", params->red_mask_size, params->red_field_pos);
+ grub_printf ("green_size = 0x%x, green_pos = 0x%x\n", params->green_mask_size, params->green_field_pos);
+ grub_printf ("blue_size = 0x%x, blue_pos = 0x%x\n", params->blue_mask_size, params->blue_field_pos);
+ grub_printf ("rsvd_size = 0x%x, rsvd_pos = 0x%x\n", params->reserved_mask_size, params->reserved_field_pos);
+ grub_printf ("vesapm = 0x%x:0x%x\n", params->vesapm_segment, params->vesapm_offset);
+ grub_printf ("pages = 0x%x\n", params->lfb_pages);
+ grub_printf ("vesa_attributes = 0x%x\n", params->vesa_attrib);
+ grub_printf ("capabilities = 0x%x\n", params->capabilities);
+ grub_printf ("press a key to continue");
+ grub_getkey ();
+
#ifdef __x86_64__
grub_memcpy ((char *) prot_mode_mem + (prot_mode_pages << 12),
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