Vz on Intel compatibility issue

Oct 13, 2025 by wbrum.org 91 views

Introduction

In recent times, it has been observed that the latest kernels no longer boot with vz on Intel. This issue has been reported by several users, and it seems to be a regression in the kernel 6.12. However, it's worth noting that Alpine still boots with kernel 6.12, which makes this issue even more puzzling. In this article, we will delve into the details of this issue, explore the possible causes, and discuss the test environment used to reproduce the problem.

The Issue

The issue at hand is that the latest kernels, specifically kernel 6.12, do not boot with vz on Intel. This means that users who are trying to use the latest kernels with vz on Intel are unable to boot their systems. The problem is not limited to a specific distribution or version, as it has been reported by users of various Linux distributions, including Ubuntu, Fedora, and Arch Linux.

Symptoms

The symptoms of this issue are quite straightforward. When a user tries to boot a system with kernel 6.12 and vz on Intel, the system fails to boot. There is no error message printed on the video or on the serial console, which makes it difficult to diagnose the problem. This lack of error messages makes it even more challenging to identify the root cause of the issue.

Booting Images

To better understand this issue, we need to take a closer look at the booting images that are affected. The following images are known to boot with kernel 6.11 but fail to boot with kernel 6.12:

Ubuntu 24.10 Server: This image uses kernel 6.11.0-14-generic and boots successfully with vz on Intel.
Fedora 41 Cloud: This image uses kernel 6.11.4-301.fc41.x86_64 and boots successfully with vz on Intel.
Arch Linux: This image uses kernel 6.12.10-arch1-1 and fails to boot with vz on Intel.

On the other hand, the following images are known to boot with kernel 6.12:

Alpine 3.21.2: This image uses kernel 6.12.8-0-virt and boots successfully with vz on Intel.

Test Environment

The test environment used to reproduce this issue is as follows:

Lima: The version of Lima used is v1.0.6.
macOS: The version of macOS used is 13.5.1.
MacBook Pro: The MacBook Pro used is a 13-inch model from 2020, with four Thunderbolt 3 ports.
CPU: The CPU used is an Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz.

Possible Causes

The possible causes of this issue are numerous, and it's difficult to pinpoint the exact reason without further investigation. However, some possible causes that come to mind are:

Regression in kernel 6.12: As mentioned earlier, the issue might be a regression in kernel 6.12, which could be causing the problem.
Vz on Intel compatibility issue: The issue might be related to the compatibility of vz on Intel with the latest kernels.
Lima version issue: The issue might be related to the version of Lima used, which could be causing the problem.

Conclusion

In conclusion, the issue of kernel 6.12 not booting with vz on Intel is a complex problem that requires further investigation. The lack of error messages makes it difficult to diagnose the problem, and the possible causes are numerous. However, it's worth noting that Alpine still boots with kernel 6.12, which makes this issue even more puzzling. We hope that this article has provided some insight into this issue and has helped to raise awareness about the problem.

Recommendations

Based on the information gathered, we recommend the following:

Use kernel 6.11: Until the issue is resolved, users are recommended to use kernel 6.11, which is known to boot with vz on Intel.
Upgrade to Lima v1.1.0: Users are recommended to upgrade to Lima v1.1.0, which might resolve the issue.
Further investigation: Further investigation is required to identify the root cause of the issue and to find a solution.

Future Work

In the future, we plan to:

Investigate the issue further: We will investigate the issue further to identify the root cause and to find a solution.
Collaborate with the community: We will collaborate with the community to gather more information and to find a solution.
Provide updates: We will provide updates on the progress of the investigation and on the solution found.

Acknowledgments

Introduction

In our previous article, we discussed the issue of kernel 6.12 not booting with vz on Intel. In this article, we will provide a Q&A section to address some of the common questions and concerns related to this issue.

Q: What is the vz on Intel issue?

A: The vz on Intel issue refers to the problem where the latest kernels, specifically kernel 6.12, do not boot with vz on Intel. This means that users who are trying to use the latest kernels with vz on Intel are unable to boot their systems.

Q: What are the symptoms of the issue?

A: The symptoms of the issue are quite straightforward. When a user tries to boot a system with kernel 6.12 and vz on Intel, the system fails to boot. There is no error message printed on the video or on the serial console, which makes it difficult to diagnose the problem.

Q: Which images are affected by the issue?

A: The following images are known to boot with kernel 6.11 but fail to boot with kernel 6.12:

Ubuntu 24.10 Server: This image uses kernel 6.11.0-14-generic and boots successfully with vz on Intel.
Fedora 41 Cloud: This image uses kernel 6.11.4-301.fc41.x86_64 and boots successfully with vz on Intel.
Arch Linux: This image uses kernel 6.12.10-arch1-1 and fails to boot with vz on Intel.

On the other hand, the following images are known to boot with kernel 6.12:

Alpine 3.21.2: This image uses kernel 6.12.8-0-virt and boots successfully with vz on Intel.

Q: What is the test environment used to reproduce the issue?

A: The test environment used to reproduce this issue is as follows:

Lima: The version of Lima used is v1.0.6.
macOS: The version of macOS used is 13.5.1.
MacBook Pro: The MacBook Pro used is a 13-inch model from 2020, with four Thunderbolt 3 ports.
CPU: The CPU used is an Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz.

Q: What are the possible causes of the issue?

A: The possible causes of the issue are numerous, and it's difficult to pinpoint the exact reason without further investigation. However, some possible causes that come to mind are:

Regression in kernel 6.12: As mentioned earlier, the issue might be a regression in kernel 6.12, which could be causing the problem.
Vz on Intel compatibility issue: The issue might be related to the compatibility of vz on Intel with the latest kernels.
Lima version issue: The issue might be related to the version of Lima used, which could be causing the problem.

Q: What are the recommendations for users affected by the issue?

A: Based on the information gathered, we recommend the following:

Use kernel 6.11: Until the issue is resolved, users are recommended to use kernel 6.11, which is known to boot with vz on Intel.
Upgrade to Lima v1.1.0: Users are recommended to upgrade to Lima v1.1.0, which might resolve the issue.
Further investigation: Further investigation is required to identify the root cause of the issue and to find a solution.

Q: What is the future work planned to address the issue?

A: In the future, we plan to:

Investigate the issue further: We will investigate the issue further to identify the root cause and to find a solution.
Collaborate with the community: We will collaborate with the community to gather more information and to find a solution.
Provide updates: We will provide updates on the progress of the investigation and on the solution found.

Q: How can users contribute to the investigation?

A: Users can contribute to the investigation by:

Reporting their findings: Users can report their findings and experiences with the issue.
Providing feedback: Users can provide feedback on the recommendations and suggestions provided.
Collaborating with the community: Users can collaborate with the community to gather more information and to find a solution.

Conclusion

In conclusion, the vz on Intel issue is a complex problem that requires further investigation. We hope that this Q&A article has provided some insight into the issue and has helped to raise awareness about the problem. We encourage users to contribute to the investigation and to provide feedback on the recommendations and suggestions provided.