It looks like the backport has missed some other change. The WARN is saying that a function pointer isn't setup - https://github.com/raspberrypi/linux/bl ... er.c#L1329
The upstream fix was merged in 6.17. 6.18 will soon be our default kernel and supported until the next LTS release at the end of 2026.
You can do "sudo rpi-update rpi-6.18.y" (no use of tree or similar) to get the 6.18 kernel which would be worth a test. I don't know if there are any other changes that are only on the 6.12 branch though.
The upstream fix was merged in 6.17. 6.18 will soon be our default kernel and supported until the next LTS release at the end of 2026.
You can do "sudo rpi-update rpi-6.18.y" (no use of tree or similar) to get the 6.18 kernel which would be worth a test. I don't know if there are any other changes that are only on the 6.12 branch though.
Statistics: Posted by 6by9 — Wed Jan 14, 2026 4:15 pm