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

[dann frazier]

Now done.

** Description changed:

- 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*
+ [Impact]
+ The last SRU introduced a regression whereby, on EFI systems that support the graphical GRUB menu, there is a flickering affect where the menu switches between graphical and console modes while scrolling through menus.
  
- 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.
+ [Test Case]
+ On an EFI system that supports a graphical GRUB menu, drop to the edit screen, and hold down the up/down arrow keys to cause rapid scrolling. You should not see the menu switch between graphical and console mode.
  
- 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.
+ [Regression Risk]
+ This SRU only removes a patch added in the previous SRU.

** Changed in: grub2-signed (Ubuntu Artful)
       Status: New => In Progress

** Changed in: grub2-signed (Ubuntu Bionic)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1752767

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

Bug description:
  [Impact]
  The last SRU introduced a regression whereby, on EFI systems that support the graphical GRUB menu, there is a flickering affect where the menu switches between graphical and console modes while scrolling through menus.

  [Test Case]
  On an EFI system that supports a graphical GRUB menu, drop to the edit screen, and hold down the up/down arrow keys to cause rapid scrolling. You should not see the menu switch between graphical and console mode.

  [Regression Risk]
  This SRU only removes a patch added in the previous SRU.

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