[Bug 1752767] Re: grub2 regression, simultaneous console and video graphical glitches with new patch

[Łukasz Zemczak]

Thanks for the fix - could you get the SRU info sorted out in the
description? (impact, test-case, regression potential)

** Also affects: grub2-signed (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  grub2 regression, simultaneous console and video graphical glitches
  with new patch

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2-signed package in Ubuntu:
  New
Status in grub2 source package in Artful:
  In Progress
Status in grub2-signed source package in Artful:
  New
Status in grub2 source package in Bionic:
  Fix Released
Status in grub2-signed source package in Bionic:
  New

Bug description:
  Okay, so the following patch at http://launchpadlibrarian.net/356413428/grub2_2.02~beta3-4ubuntu7.1_2.02~beta3-4ubuntu7.2.diff.gz
  which basically amounts to changing a single line in /etc/grub.d/00_header TOTALLY breaks my menu selection graphics when I boot up. Every time a line changes, like as in scrolling the menu or watching the countdown timer, I can see the console mode GRUB line flashing black and white behind the video gfx mode screen. I believe this regression is caused entirely by Dann Frazier's idea for the grub patch: "Instead of switching from "console" to "gfxterm", let's output to both." *sigh*

  Removing the single change, the "--append" flag, in the file
  /etc/grub.d/00_header and regenerating the grub.cfg file completely
  solves the problem. What concerns me is that this patch somewhat
  breaks the average user's default grub gfx mode; it looks glitchy and
  horrible. I simply cannot tolerate this behavior on an incredibly
  simple boot selection menu, let alone on an actual grub theme, KDE-
  style. My machine is a very standard HP EliteDesk 800 G3 Mini Desktop,
  and I had no problems before with GRUB doing this horrible-looking
  pop-from-behind simultaneous video and console behavior. This tiny
  patch represents a misguided and frankly appalling regression.

  And yes, this applies upstream to Bionic Beaver (I tried the proposed
  package also) as well as the current version of the grub2 package on
  Artful Aardvark. Please fix before the Ubuntu LTS release ships with
  this glaring bug.

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