Fedora's memtest option doesn't work, but found something that seems to??

[Michael D. Setzer II via users]

I've noticed for a while running memtest from grub2 
menu just gives a blue screen and locks machine.

Had a similar issue running it from grub4dos, but found 
running syslinux memdisk and then running program 
worked, but exact same thing didn't work with grub2??
So, just tried using the iso versus the memtest.img 
extracted from it, and that comes up.

Manually modifed the grub.cfg by coping section that 
Fedora creates and making changes??
Have seen messages saying it was broken, but never 
found any fixes. So, not sure some can tell why? or if this 
would be useful to others to try??


### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry 'Fedora Memtest memtest86+-5.31' {
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 
--hint-efi=hd0,msdos5 
--hint-baremetal=ahci0,msdos5 --hint='hd0,msdos5'  
fa908208-22bd-4031-b620-841498e0708c
        else
          search --no-floppy --fs-uuid --set=root 
fa908208-22bd-4031-b620-841498e0708c
        fi
        insmod bsd
        echo    'Loading Fedora Memtest memtest86+-5.31 ...'
        knetbsd /elf-memtest86+-5.31
}
menuentry 'Memtest' {
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 
--hint-efi=hd0,msdos5 
--hint-baremetal=ahci0,msdos5 --hint='hd0,msdos5'  
fa908208-22bd-4031-b620-841498e0708c
        else
          search --no-floppy --fs-uuid --set=root 
fa908208-22bd-4031-b620-841498e0708c
        fi
        echo 'Loading memdisk'
        linux16 /memdisk iso
        echo 'Loading iso'
        initrd16 /memtest86+-5.31b.iso
}


### END /etc/grub.d/20_memtest86+ ###


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