[Bug 1570249] Re: Braswell + UBUNTU 15.10 legacy mode , grub2 graphics interface picture color distorted

[kai]

** Attachment added: "Attach /boot/grub/grub.cfg and /etc/default/grub file."
   https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1570249/+attachment/4636620/+files/grub

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Title:
  Braswell + UBUNTU 15.10 legacy mode , grub2 graphics interface
  picture color distorted

Status in grub2 package in Ubuntu:
  New

Bug description:
  Braswell + UBUNTU 15.10 legacy mode , grub2 graphics interface
  picture color distorted

  grub2 version:  2.02~beta2-29
  Ubuntu: 15.10 64bit
  CPU: Braswell N3050 / N3150
  Graphics:   Intel HD graphics(cherryview)

  1. no problem under Ubuntu UEFI mode:    attach photo as
  uefi_normal.png

  2. Ubuntu legacy mode:   grub2 GUI picture distorted  ( attach photo
  as legacy_abnormal.jpg ) .  Attach /boot/grub/grub.cfg and
  /etc/default/grub file.

  Have tried below change,  all  failed.
               a. Try to set GRUB_GFXMODE to auto , 1024x768 , 1024x768x8 , ... in/etc/default/grub. Nothing help.
               b. update VBIOS to latest version 

  Under grub GUI , can't get any result after run vbeinfo , vbetest.
  After uncomment GRUB_TERMINAL=console , i can run vbeinfo , vbetest.

  >vbeinfo
       list of supported video modes:
       Legend: mask/position=red/green/blue/reserverd
       Adapter "VESA BIOS Extension video Driver" :
             VBE info:    version: 3.0  OEM software rev: 1.0
                                  total memory: 63424 KiB

  > vbetest
  error: no suitable video mode found.

  This issue have been seen on MSI N3150I ECO , ASUS N3050I-C , ASROCK
  N3150B-ATX .

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