[bug #20731] Boot memtest86+ from grub with setvbe command result in black screen

[Dmitry]

URL:
  <http://savannah.gnu.org/bugs/?20731>

                 Summary: Boot memtest86+ from grub with setvbe command
result in black screen
                 Project: GNU GRUB
            Submitted by: dinvalid
            Submitted on: Четверг 09.08.2007 at 12:36
                Category: Booting
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 0.4.3
         Reproducibility: Every Time
         Planned Release: 

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Details:

Boot memtest86+.bin from grub like this 
title MemTest86+
kernel /boot/memtest.bin

usually work, but, if we set video mode, for example

setvbe 800x600x32
title MemTest86+
kernel /boot/memtest.bin

Result in black screen.
Memtest seems working, and reboot on ESC key, but we can see nothing on
screen. 

Maybe we must change video mode to standart textmode before boot something?

#trunk/stage2/stage2.c
  /* Attempt to boot an entry.  */
  
 boot_entry:
  
  cls (); <- setvideomode(0x03) ???













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