[Bug 2012181] Re: lunar (alpha) grub "no usable video mode found"

[David Coe]

To further confirm that grub2 2.06-2ubuntu16 (Lunar) has introduced a
regression on 2.06-2ubuntu12.1 (Kinetic), at least on the Dell Vostro
400.

A. dual-booting Lunar and Kinetic from Kinetic's boot-manager auto-
detects the 1920x1080 display with no diagnostics.

B. single-booting Lunar with it's boot-manager (2.06-2ubuntu16) back-
graded with the set from Kinetic (2.06-2ubuntu12.1) also works just
fine.

C. single-booting Lunar with the current (alpha) grub fails to auto-
detect and defaults to 640x480 resolution with above diagnostics. I
think it also fails to pick up alternative (breeze) grub themes.

Hope this helps! For the time being, I'll persevere with testing my MPI
cluster with option B and apt-mark hold the grub package :-).

Regards

David Coe

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https://bugs.launchpad.net/bugs/2012181

Title:
  lunar (alpha) grub "no usable video mode found"

Status in grub2 package in Ubuntu:
  New

Bug description:
  I'm bare-metal testing Kubuntu Lunar 23.04 on a collection of amd64
  machines connected in an MPI cluster. Things have gone very smoothly
  indeed, despite it being still an alpha-release!

  However, one machine (an elderly Dell Vostro 400) is showing a
  regression for Grub 2.06-2ubuntu16 compared with Kinetic 22.10. The
  following occurs during boot-up:

    error: no server specified
           no suitable video mode found
           no video mode activated

  The grub menu stubbornly displays at 640x480 (AMD Turks driving a LG
  24EA52 1920x1080 monitor usually picks up just fine). Auto-detection
  no longer functions and manual changes to GRUB_GFXMODE are ignored.

  X11 starts and KDE initializes as usual (and at the correct
  resolution), so the error message is somewhat cosmetic and doesn't
  seem to affect more modern machines. Nonetheless, it does seem a bug
  that could/should be corrected.

  Best regards and thank you.

  David Coe

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