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



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


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


Overall system startup appears noticeably slower compared to previous kernels.

Expected Behavior

The system boots reliably without EFI stub errors, ACPI warnings, or unexpected 
wake events during suspend.

Observed Behavior

Kernel 6.12.73+deb13-amd64 causes intermittent boot loader failures, 
ACPI-related warnings, and unreliable suspend functionality on this hardware.

Workaround

Booting an earlier kernel (e.g., 6.12.69+deb13-amd64) restores normal behavior 
and eliminates the EFI decompression failure and sleep issues.

Additional Notes

Reinstalling the kernel temporarily resolved the EFI decompression error, 
suggesting either a regression affecting older firmware platforms or 
sensitivity during installation on legacy UEFI implementations.


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


Best regards,


Donovan


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