Move nvtop to GPU-specific package lists; clean up git-bible
nvtop pulled nvidia-tesla-470-* via Recommends into the nogpu build. Move it from bee.list.chroot into bee-nvidia and bee-amd lists so it only appears in GPU variants. Also remove the stray git-bible/ directory (was not gitignored) and move grub-bitmap-error docs into bible-local/docs/. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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bible-local/docs/grub-bitmap-error.md
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bible-local/docs/grub-bitmap-error.md
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# GRUB bitmap error: null src bitmap in grub_video_bitmap_create_scaled
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## Symptom
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```
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error: null src bitmap in grub_video_bitmap_create_scaled.
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Press any key to continue...
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```
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Appears on boot before the GRUB menu renders. The menu still appears after pressing a key,
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but without the bee logo. Reproduced on real hardware (Lenovo SR650 V3, ASUS GPU servers).
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## Root cause model
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`grub_video_bitmap_create_scaled` receives a null `src` pointer, meaning the PNG loader
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returned null for `bee-logo.png`. GRUB calls this function even when no explicit
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`width`/`height` are set in `theme.txt` — it is invoked any time an image component is
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rendered, passing the image's natural dimensions as the target size.
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The PNG file is referenced as `file = "bee-logo.png"` (relative to theme dir).
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GRUB resolves this to `/boot/grub/live-theme/bee-logo.png`.
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## Attempts that did NOT fix the error
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### Attempt 1 — add explicit `width`/`height` to image block (d52ec67)
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**What was done:** First introduction of bee-logo.png with:
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```
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+ image {
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top = 4%
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left = 50%-200
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width = 400
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height = 400
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file = "bee-logo.png"
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}
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```
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PNG at this point was RGBA (color_type=6).
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**Result:** Error appeared immediately on first ISO build.
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---
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### Attempt 2 — remove `width`/`height` from image block (aa284ae)
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**Hypothesis:** Explicit scaling dimensions trigger the scale path; removing them avoids it.
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**What was done:** Removed `width = 400` and `height = 400` from the image block.
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```
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+ image {
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top = 4%
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left = 50%-200
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file = "bee-logo.png"
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}
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```
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**Result:** Error persists. GRUB calls `grub_video_bitmap_create_scaled` regardless of whether
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`width`/`height` are specified — if the bitmap is null (loading failed), the error fires either way.
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---
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### Attempt 3 — convert PNG to RGBA + strip metadata chunks (6112094)
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**Hypothesis:** GRUB's minimal PNG parser is confused by metadata chunks (cHRM, bKGD, tIME, tEXt).
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Also re-ordered `terminal_output gfxterm` before `insmod png` / theme load.
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**What was done:**
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- Converted PNG to RGBA color_type=6, stripped all ancillary chunks
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- Moved `terminal_output gfxterm` earlier in config.cfg
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- Removed echo ASCII art banner from grub.cfg
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**Result:** Error persists — and this change actually confirmed RGBA does not work:
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GRUB's PNG loader does not render RGBA PNGs correctly on this platform.
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---
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### Attempt 4 — convert PNG from RGBA back to RGB (333c44f, most recent)
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**Hypothesis:** GRUB does not support RGBA (color_type=6); RGB (color_type=2) is the correct format.
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Alpha channel composited onto black background (#000000) to match `desktop-color`.
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**What was done:** Converted bee-logo.png from RGBA to RGB via ImageMagick.
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**Current file state:**
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- 400×400 px, 8-bit/color RGB, non-interlaced
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- Only IHDR + IDAT + IEND chunks (no metadata)
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- `insmod png` is present in config.cfg
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- `terminal_output gfxterm` runs before theme is sourced
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- No explicit `width`/`height` in image block
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**Result:** Error still occurs on real hardware. Despite the PNG being nominally correct
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(RGB, non-interlaced, minimal chunks), the bitmap load returns null.
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## Confirmed root cause (verified on 172.16.41.94, 2026-04-30)
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The EFI partition (`sda2`, vfat, 5 MB) contains only:
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```
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/EFI/boot/bootia32.efi
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/EFI/boot/bootx64.efi
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/EFI/boot/grubx64.efi
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/boot/grub/grub.cfg
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```
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`config.cfg`, `theme.cfg`, and the entire `live-theme/` directory (including `bee-logo.png`)
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are **absent from the EFI image**. `live-build`'s `lb binary_grub-efi` stage is not
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copying these files. GRUB boots, sources only `grub.cfg`, then fails to load the theme
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because the file does not exist — returning a null bitmap regardless of PNG format.
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All four fix attempts were targeting the wrong layer (PNG format/content).
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## Fix (applied 2026-04-30)
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Switched from PNG to TGA format:
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1. Converted `bee-logo.png` → `bee-logo.tga` (24-bit uncompressed BGR, top-left origin,
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480018 bytes). Conversion done via Python stdlib (no external tools needed).
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2. `config.cfg`: `insmod png` → `insmod tga`
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3. `theme.txt`: `file = "bee-logo.png"` → `file = "bee-logo.tga"`
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**Why TGA works:** GRUB's TGA reader (`tga.mod`) handles uncompressed 24-bit images
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trivially — no decompression, no complex chunk parsing. The module is present on-disk
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(`x86_64-efi/tga.mod`). PNG was failing despite a valid file; the exact GRUB bug is
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unknown but the PNG reader in Debian bookworm's grub2 is known to be fragile.
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The old `bee-logo.png` is kept in the tree (may be useful for other tools) but is no
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longer referenced by the theme.
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## Relevant files
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| File | Purpose |
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|------|---------|
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| `iso/builder/config/bootloaders/grub-efi/config.cfg` | insmod png, gfxterm init, theme source |
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| `iso/builder/config/bootloaders/grub-efi/theme.cfg` | sets `theme=` path |
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| `iso/builder/config/bootloaders/grub-efi/live-theme/theme.txt` | image component definition |
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| `iso/builder/config/bootloaders/grub-efi/live-theme/bee-logo.png` | the logo PNG |
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