Public bug reported:
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 .
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "legacy_abnormal.jpg"
https://bugs.launchpad.net/bugs/1570249/+attachment/4636614/+files/legacy_abnormal.jpg
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https://bugs.launchpad.net/bugs/1570249
Title:
Braswell + UBUNTU 15.10 legacy mode , grub2 graphics interface
picture color distorted
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