URL:
<https://savannah.gnu.org/bugs/?62925>
Summary: Out of memory error initializing graphics on some
Apple M1 systems
Project: GNU GRUB
Submitter: marcan
Submitted: Sat 20 Aug 2022 11:32:41 AM UTC
Category: Booting
Severity: Major
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Release: Git master
Release:
Discussion Lock: Any
Reproducibility: Every Time
Planned Release: None
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Follow-up Comments:
-------------------------------------------------------
Date: Sat 20 Aug 2022 11:32:41 AM UTC By: Hector Martin <marcan>
As of grub-2:2.06.r297.g0c6c1aff2-1-aarch64 as packaged by Arch Linux ARM
(which is vanilla grub as of that git revision, other than grub.d patches and
trivial packaging-related changes), initializing graphics fails on Apple M1
Pro MacBook 14" systems, and probably others, with an out of memory error.
This leads to a degraded text console with broken menu graphic characters.
This didn't happen with the previous package (grub-2.06.r261.g2f4430cc0-1).
The open source boot stack on these systems uses U-Boot as an EFI services
provider. It seems GRUB is simply running out of heap as of recent changes.
This trivial patch fixes it:
diff -urN grub-core/kern/efi/mm.c grub-core/kern/efi/mm.c
--- grub-core/kern/efi/mm.c 2022-08-20 20:17:23.975902981 +0900
+++ grub-core/kern/efi/mm.c 2022-08-20 20:17:16.268139945 +0900
@@ -39,7 +39,7 @@
#define MEMORY_MAP_SIZE 0x3000
/* The default heap size for GRUB itself in bytes. */
-#define DEFAULT_HEAP_SIZE 0x100000
+#define DEFAULT_HEAP_SIZE 0x200000
static void *finish_mmap_buf = 0;
static grub_efi_uintn_t finish_mmap_size = 0;
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