The upcoming Linux 6.12 release brings an exciting feature: QR code support in the DRM Panic handler. This update aims to improve the debugging process during kernel panics, making it more efficient and user-friendly.
When a Linux kernel panic occurs, the system displays error messages on the screen. Unfortunately, these messages often get cut off, making it hard to capture all the information needed for troubleshooting. The new QR code support changes this by encoding extensive debugging information into a simple, scannable image.
Why Use QR Codes? #
Using QR codes for kernel panic information isn’t a new idea. The Linux community has discussed it for years, and other operating systems have tried similar concepts. Now, Linux 6.12 turns this idea into reality.
QR codes store a lot of data in a compact format. When a kernel panic happens, the system generates a QR code on the screen. Users and developers can scan it easily with a smartphone or other devices. This process allows quick access to detailed error information and links to troubleshooting resources.
How It Works #
Linux 6.12 implements QR code support in Rust, marking the kernel’s gradual adoption of this language. Users must enable the Rust kernel build to use this feature. The DRM_PANIC_SCREEN_QR_CODE Kconfig build switch controls whether this functionality is included.
Additionally, users can customize the QR code’s base URL and version. This flexibility allows the QR code to hold more or less debugging data, depending on the specific needs.
What’s Next? #
This feature has been submitted to DRM-Next for staging before the Linux 6.12 merge window, expected in mid-September. If everything goes smoothly, users will see this enhancement in the final release, improving kernel panic handling and making it easier to report errors.
In summary, adding QR codes to the DRM Panic handler in Linux 6.12 represents a big step forward. It simplifies error reporting and opens the door to more user-friendly debugging tools in the future.
