[Bug 1086289] Re: Wrong grub-efi resolution during OS boot menu selection

[Ubfan]

I have seen the reduced grub resolution, but only after an EFI boot failure and its subsequent fallback to the /Boot/bootx64.efi.
My machine is a Toshiba Satellite S855, and it boots off USB with a correctly set up ESP at full resolution, but when I select the hard disk's ubuntu choice, I got the reduced resolution.  Examining the actual hard disk ubuntu boot path, it was ...ubuntu/grubx674.efi, which is wrong for a secure boot (which I use).  It should be ...ubuntu/shim.efi.  The ...Boot/bootx64.efi contained a copy of the shim.efi, and when the bootx64 file was removed, the boot failed.  I conclude that the first boot attempt to grubx64 directly silently failed, then EFI tried the Boot/bootx64 and succeeded in starting shim, which started grub -- at the wrong resolution.
  I'd suggest checking your boot path with 
sudo efibootmgr -v
and confirm that it is what you think it is.  So much renaming of these files can occur that  looking at the sizes is necessary to confirm their identity.  There are signed and unsigned versions  of grubx64, and only the correct one will work.  As an example of this sequence of errors on a non-secure boot machine, suppose the bootx64 contains  copy of the non-signed grubx64 (which will work), but the boot path is to ubuntu/grubx64 which is the signed version.  
  I have not bothered to correct the boot path, since I don't notice any delays, and the resolution doesn't bother me, so I may be totally wrong that correcting the initial boot path will fix things.  Also I feel I need to learn more about NVRAM and how to determine how much free space is available before adding things to it like new boot choices -- the Samsung situation of too little NVRAM makes me cautious, afraid I'll brick my machine.

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https://bugs.launchpad.net/bugs/1086289

Title:
  Wrong grub-efi resolution during OS boot menu selection

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  So I recently decided to try to install windows 7 and ubuntu 12.10 in UEFI mode and succeeded in doing that. Both system load as the should and everything work perfectly but there is one thing that keeps bothering me and it is grub resolution.
  Before that I was using dual boot system Ubuntu and Windows in BIOS mode and grub resolution was correct 1366x768 (which is my native resolution)  After reinstalling both OS in UEFI mode grub resolution became wrong (which I assume is 640x480) BUT Splash screen resolution on boot and shutdown is CORRECT (1366x768). Only grub boot menu is incorrect.

  What I tried:
  editing sudo gedit /etc/default/grub
  and uncommenting GRUB_GFXMODE + setting resolution 1366x768 DIDN'T WORK

  Tried to edit line above + sudo gedit /etc/grub.d/00_header where  I add line
  set gfxpayload=keep under line set gfxmode=${GRUB_GFXMODE} DIDN'T WORK.

  So I consider that to be a bug cause again when  I had both systems
  installed in BIOS mode my resolution was correct in grub menu.

  I am running ASUS laptop K53SV
  intel HD 3000 + Nvidia Optimus GeForce GT  (bumblebee installed)
  + xorg edgers ppa (so all drivers are up-to date)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: grub-efi 2.00-7ubuntu11
  ProcVersionSignature: Ubuntu 3.7.0-4.12-generic 3.7.0-rc7
  Uname: Linux 3.7.0-4-generic x86_64
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  Date: Tue Dec  4 10:26:44 2012
  InstallationDate: Installed on 2012-11-30 (3 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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