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.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1086289 Title: Wrong grub-efi resolution during OS boot menu selection To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1086289/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
