Public bug reported: For months, my EFI grub has been happy to accept GRUB_GFXMODE=2560x1440 (my monitor native resolution).
However, since the recent update to 2.02~beta3-4ubuntu7.2, all I get is a < 1s flash of the high resolution version (with background image) then it falls back to white on grey. If I comment out the GRUB_GFXMODE and GRUB_BACKGROUND lines, and "update-grub", I get a low resolution version with the background image still in place, and some flickering text artefacts. With the config as show below with GRUB_GFXMODE=1024x768 and GRUB_BACKGROUND="..." I get a working grub, although at a lower resolution which looks a bit crappy. Although this might seem a fairly trivial bug in terms of actual impact, I do have a dual boot machine and I hop between Linux and Windows a few times a day, and I like it when grub looks nice and crisp. System is an AMD Ryzen 1800X, Hero Vi Motherboard and Nvidia 1080Ti GFX card. ➜ ~ apt-cache policy grub-efi-amd64 grub-efi-amd64: Installed: 2.02~beta3-4ubuntu7.2 Candidate: 2.02~beta3-4ubuntu7.2 Version table: *** 2.02~beta3-4ubuntu7.2 500 500 http://gb.archive.ubuntu.com/ubuntu artful-updates/main amd64 Packages 100 /var/lib/dpkg/status 2.02~beta3-4ubuntu7 500 500 http://gb.archive.ubuntu.com/ubuntu artful/main amd64 Packages ➜ ~ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 17.10 Release: 17.10 Codename: artful ➜ ~ cat /etc/default/grub # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=saved GRUB_SAVEDEFAULT=true #GRUB_HIDDEN_TIMEOUT=0 #GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_TIMEOUT_STYLE=menu GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' GRUB_GFXMODE=1024x768 GRUB_BACKGROUND="/boot/grub/grub_background.png" # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1753837 Title: GRUB_GFXMODE no longer supports high resolution since upgrading to 2.02~beta3-4ubuntu7.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1753837/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs