How to fix E: Method https has died unexpectedly! in APT

APTINTERMEDIATEHIGHUpdated Dec 29, 2025· 230 views

This error occurs when apt's HTTPS method crashes during package updates, usually due to CPU instruction incompatibility or corrupted binaries. Set GNUTLS_CPUID_OVERRIDE=0x1 or reinstall apt-transport-https to fix it.

Quick fix

Fixes E: Method https has died unexpectedly!

GNUTLS_CPUID_OVERRIDE=0x1 sudo apt update
  1. Apply the GNUTLS_CPUID_OVERRIDE fix (immediate solution)
  2. Make the GNUTLS fix permanent
  3. Reinstall apt-transport-https (alternative approach)
  4. Clear and rebuild apt cache
apt — error
GNUTLS_CPUID_OVERRIDE=0x1 sudo apt update
E: Method https has died unexpectedly!

What this error means

When apt attempts to fetch packages from HTTPS repositories, it uses a method handler to manage the HTTPS connection. "Method https has died unexpectedly" indicates that the HTTPS handler process crashed or was terminated abnormally. This typically happens when the gnutls library (used for SSL/TLS connections) encounters instructions that your CPU doesn't support, causing an illegal instruction error. Alternatively, the apt methods binary may be corrupted or incompatible with your system architecture.

Typical symptoms

  • apt-get update fails with "E: Method https has died unexpectedly!"
  • apt-get install commands fail when fetching from HTTPS repositories
  • You may see "Sub-process https received signal 4" (Illegal Instruction signal)
  • Errors occur specifically with HTTPS repositories but not HTTP ones
  • The issue happens on virtual machines, containers, or older/uncommon CPU architectures
  • Error appears consistently when running any apt command that uses HTTPS

Common causes

  1. GNUTLS library using CPU instructions not supported by your processor (most common)
  2. Running apt on virtualized systems or containers with incomplete CPU instruction sets
  3. Corrupted apt-transport-https binary or incompatible version
  4. Illegal instruction (signal 4) due to CPU architecture mismatch between binary and system
  5. Older CPUs or ARM-based systems (Raspberry Pi) lacking newer instruction support
  6. Library version conflicts between gnutls and system components

How to fix "E: Method https has died unexpectedly!"

1Apply the GNUTLS_CPUID_OVERRIDE fix (immediate solution)

The quickest fix is to set an environment variable that tells GNUTLS to avoid problematic CPU instructions:

bash
GNUTLS_CPUID_OVERRIDE=0x1 sudo apt update

If this works, you can make it permanent so you don't need to set it each time.

2Make the GNUTLS fix permanent

Edit your system environment file to always apply the fix:

bash
sudo nano /etc/environment

Add this line at the end of the file:

bash
GNUTLS_CPUID_OVERRIDE=0x1

Save the file (Ctrl+O, Enter, Ctrl+X), then log out and log back in or reboot:

bash
reboot

Alternatively, add it to your shell profile for user-level changes:

bash
echo "export GNUTLS_CPUID_OVERRIDE=0x1" >> ~/.bashrc
source ~/.bashrc
3Reinstall apt-transport-https (alternative approach)

If the GNUTLS fix doesn't work, the binary may be corrupted. Reinstall the package:

bash
GNUTLS_CPUID_OVERRIDE=0x1 sudo apt-get install --reinstall apt-transport-https

Note: You may need to use the GNUTLS_CPUID_OVERRIDE environment variable even during reinstallation if the issue is CPU-related.

For Raspberry Pi or other ARM systems, you might need to specify the exact version:

bash
sudo apt-get install --reinstall apt-transport-https=1.8.2.3_armhf.deb
4Clear and rebuild apt cache

If reinstalling doesn't help, clear the apt cache and rebuild it:

bash
GNUTLS_CPUID_OVERRIDE=0x1 sudo apt-get clean
GNUTLS_CPUID_OVERRIDE=0x1 sudo rm -rf /var/lib/apt/lists/*
GNUTLS_CPUID_OVERRIDE=0x1 sudo apt-get update

This removes potentially corrupted metadata and downloads fresh package lists.

5Kill stuck apt processes and fix locks

If apt is completely stuck, force-kill any running apt processes:

bash
sudo killall apt apt-get
sudo rm /var/lib/apt/lists/lock
sudo rm /var/lib/dpkg/lock
sudo rm /var/lib/dpkg/lock-frontend
sudo rm /var/cache/apt/archives/lock
sudo dpkg --configure -a

Then try apt again with the GNUTLS fix:

bash
GNUTLS_CPUID_OVERRIDE=0x1 sudo apt update
6Use HTTP instead of HTTPS as a last resort

If HTTPS continues to fail and you cannot apply the fixes, temporarily use HTTP repositories instead:

bash
sudo nano /etc/apt/sources.list

Replace https:// with http:// in all lines. For example, change:

bash
deb https://deb.debian.org/debian bullseye main

to:

bash
deb http://deb.debian.org/debian bullseye main

Also check and update any files in /etc/apt/sources.list.d/. After making changes:

bash
sudo apt update

Note: This reduces security, so resolve the GNUTLS issue when possible and switch back to HTTPS.

Advanced notes

The "Method https died unexpectedly" error is strongly associated with GNUTLS (GNU Transport Layer Security) library version mismatches or CPU instruction compatibility issues. This is especially common in cloud VMs, containers (Docker, LXC), and Raspberry Pi systems where CPU capabilities may be restricted. Signal 4 (Illegal Instruction) indicates the gnutls binary was compiled with instructions your CPU doesn't support. The GNUTLS_CPUID_OVERRIDE=0x1 environment variable disables certain CPU feature detection, allowing gnutls to use a more compatible instruction set. For virtual machines, check hypervisor settings for CPU feature flags. In Docker, ensure your base image includes compatible gnutls packages. Some distributions provide precompiled apt-transport-https packages for specific architectures; verify your system architecture with dpkg --print-architecture before manual installation.

Frequently asked questions

What does "E: Method https has died unexpectedly!" mean?
When apt attempts to fetch packages from HTTPS repositories, it uses a method handler to manage the HTTPS connection. "Method https has died unexpectedly" indicates that the HTTPS handler process crashed or was terminated abnormally. This typically happens when the gnutls library (used for SSL/TLS connections) encounters instructions that your CPU doesn't support, causing an illegal instruction error.
How do I fix "E: Method https has died unexpectedly!"?
This error occurs when apt's HTTPS method crashes during package updates, usually due to CPU instruction incompatibility or corrupted binaries. Set GNUTLS_CPUID_OVERRIDE=0x1 or reinstall apt-transport-https to fix it.
What causes "E: Method https has died unexpectedly!"?
GNUTLS library using CPU instructions not supported by your processor (most common) Running apt on virtualized systems or containers with incomplete CPU instruction sets Corrupted apt-transport-https binary or incompatible version
Is the "E: Method https has died unexpectedly!" error serious?
Yes. This is a high-severity error that usually blocks work until it is fixed, but the steps above resolve it.

Official resources & further reading