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Bug#1128632: linux-image-6.12.73+deb13-amd64: boot failures, ACPI errors, and sleep issues on ASUS Sabertooth Z77 (i7-3770K)

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Hello,

On Sun, Feb 22, 2026 at 03:18:02AM +0100, dgering@tutanota.com wrote:
> Package: linux-image-6.12.73+deb13-amd64
> Version: 6.12.73+deb13-amd64
> Severity: important
> 
> 
> 
> Dear Debian Kernel Team,
> 
> 
> I would like to report several boot and power-management issues observed after installing kernel version 6.12.73+deb13-amd64 on older Ivy Bridge hardware.
> 
> System Information
> 
> 
> Motherboard: ASUS Sabertooth Z77
> CPU: Intel Core i7-3770K (Ivy Bridge)
> Firmware: UEFI (legacy-compatible board)
> Distribution: Debian (stable branch)
> Architecture: amd64
> GPU: NVIDIA (proprietary driver installed)
> 
> 
> Problem Description
> 
> After upgrading to kernel 6.12.73+deb13-amd64, the system exhibits multiple boot and runtime problems:
> 
> 
> Boot failures occur intermittently with the following messages:
> 
> 
> 
> EFI stub: ERROR: Failed to decompress kernel
> EFI stub: ERROR: efi_stub_entry() failed

That is really surprising. This happens very early in the boot process
and if there was a problem in that code, this wouldn't be the only
report. The efi stub randomizes the memory location, that is the only
non-deterministic thing I'm aware of that could explain that (maybe in
combination with a BIOS issue where a memory area isn't marked as
reserved). Did that happen more than once and only with
6.12.73+deb13-amd64?

> During successful boots, ACPI-related errors appear in dmesg involving unresolved symbols and SATA controller initialization (_GTF/DSSP related messages).

That is unfortunately normal and most of the time no problem. I would
expect you have these with earlier kernels, too.

> System suspend behavior is unreliable:
> *When placing the system into sleep mode, the computer immediately wakes without user interaction.

https://www.kernel.org/doc/html/latest/power/basic-pm-debugging.html#a-test-modes-of-hibernation
contains some debug ideas. I'm not sure how up-to-date this document is,
but it is worth a try.

> Please let me know if additional logs, dmesg output, or hardware information would be helpful for debugging.

Can you please provide a kernel log for both 6.12.69+deb13-amd64 and
6.12.73+deb13-amd64?

Best regards
Uwe

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Bug#1128632: linux-image-6.12.73+deb13-amd64: boot failures, ACPI errors, and sleep issues on ASUS Sabertooth Z77 (i7-3770K) dgering@tutanota.com - 2026-02-22 03:30 +0100
  Bug#1128632: linux-image-6.12.73+deb13-amd64: boot failures, ACPI errors, and sleep issues on ASUS Sabertooth Z77 (i7-3770K) Uwe Kleine-König <ukleinek@debian.org> - 2026-02-27 23:00 +0100
  Processed: Re: Bug#1128632: linux-image-6.12.73+deb13-amd64: boot  failures, ACPI errors, and sleep issues on ASUS Sabertooth Z77 (i7-3770K) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-02-27 23:00 +0100
  Bug#1128632: linux-image-6.12.73+deb13-amd64: boot failures, ACPI errors, and sleep issues on ASUS Sabertooth Z77 (i7-3770K) Uwe Kleine-König <ukleinek@debian.org> - 2026-03-04 18:40 +0100
  Bug#1128632: linux-image-6.12.73+deb13-amd64: boot failures, ACPI errors, and sleep issues on ASUS Sabertooth Z77 (i7-3770K) Uwe Kleine-König <ukleinek@debian.org> - 2026-03-07 08:30 +0100

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