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  Fix GRUB bitmap error: switch from PNG to TGA for splash logo

  mchus released this 2026-04-30 15:46:13 +03:00 | 46 commits to main since this release

  GRUB's PNG reader (grub2 bookworm) fails to load bee-logo.png despite the
  file being valid RGB 8-bit non-interlaced PNG with minimal chunks. Root
  cause is a known fragility in GRUB's png.c; exact trigger is unknown.

  Switch to uncompressed 24-bit TGA which bypasses the PNG parser entirely.
  tga.mod is already present in the ISO (x86_64-efi/tga.mod).

  • Convert bee-logo.png → bee-logo.tga (480018 bytes, BGR top-left)
  • config.cfg: insmod png → insmod tga
  • theme.txt: bee-logo.png → bee-logo.tga
  • Document all prior failed attempts in git-bible/grub-bitmap-error.md

  Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com

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