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

[Mate Kukri]

The legacy VGA BIOS on your machine doesn't seem to support the same colour depth as UEFI GOP does.
There isn't anything GRUB2 can do about this, and the menu is still displayed "correctly" with just less colour depth.

As BIOS support is getting worse and worse on new machines, it is
recommended to use UEFI boot instead of CSM.

** Changed in: grub2 (Ubuntu)
       Status: New => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1570249

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

Status in grub2 package in Ubuntu:
  Invalid

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 .

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1570249/+subscriptions