Re: Kernel boots failed after Sept 12 (main-n289064-0d022baa047a)

Did i915 module and kernel abi change? You may need to uninstall i915,
rebuild / boot kernel, and rebuild i915 / drm-kmod from scratch.


-a


On Fri, 18 Sept 2026 at 16:01, Kevin Oberman <rkoberman@gmail.com> wrote:

> I have been unable to build a kernel that would boot to multi-user since
> almost a week ago. It looks like it is tied to lkpi:
> drmn0: successfully loaded firmware image 'i915/adlp_dmc.bin'
> drmn0: [drm] Finished loading DMC firmware i915/adlp_dmc.bin (v2.20)
> drmn0: [drm] [ENCODER:244:DDI B/PHY B] unusable PPS, disabling eDP
> Kernel page fault with the following non-sleepable locks held:
> exclusive sleep mutex lkpi-priv-dma (lkpi-priv-dma) r = 0
> (0xfffff800080b2f20) locked @
> /usr/src/sys/compat/linuxkpi/common/src/linux_pci.c:2117
> stack backtrace:
> #0 0xffffffff80cce50c at witness_debugger+0x6c
> #1 0xffffffff80ccfe0c at witness_warn+0x4bc
> #2 0xffffffff811eb9c7 at trap_pfault+0x97
> #3 0xffffffff811b8ea8 at calltrap+0x8
> #4 0xffffffff8360927c at i915_gem_gtt_prepare_pages+0x3c
> #5 0xffffffff8378c281 at shmem_get_pages+0xe1
> #6 0xffffffff837895e8 at __i915_gem_object_get_pages+0x38
> #7 0xffffffff8361697a at i915_vma_pin_ww+0x11a
> #8 0xffffffff836173e6 at __i915_ggtt_pin+0x76
> #9 0xffffffff837257f4 at __intel_context_do_pin_ww+0x474
> #10 0xffffffff83725b6b at __intel_context_do_pin+0x3b
> #11 0xffffffff83727d0f at intel_engine_create_pinned_context+0xef
> #12 0xffffffff837284ed at intel_engines_init+0x5ed
> #13 0xffffffff83735cfe at intel_gt_init+0x17e
> #14 0xffffffff83607bdd at i915_gem_init+0x26d
> #15 0xffffffff83603ded at i915_driver_probe+0x8ed
> #16 0xffffffff80f3843b at linux_pci_attach_device+0x55b
> #17 0xffffffff80c92606 at device_attach+0x466
>
> System is an AlderLake 2th Gen Intel(R) Core(TM) i5-1235U (2496.00-MHz
> K8-class CPU)
>
> While I can provide a core.txt file, to my inexperienced eyes, it looks
> corrupted.
>
> Kernel build cleanly, but several builds over the past 6 days have all
> failed.
>
> Any clues would be appreciated.
> --
> Kevin Oberman, Part time kid herder and retired Network Engineer
> E-mail: rkoberman@gmail.com
>
>