Kernel doesn't load on Lenovo X1 Carbon 12th Gen (no output)

nagmat84 · Apprentice Joined: 27 Mar 2007 Posts: 266

I have a Lenovo X1 Carbon 12th Gen and the Linux kernel directly crashes immediately after loading. I probably missed some important kernel config, but I don't have any clue which one.

Configuration

Boot manager: refind (refind does load)
Kernel: 6.11.8 with EFI stub support
Partition layout: nvme0n1p1 (EFI System), ..., nvme01p4 (Linux Swap), nvme01p5 (Linux Root), nvme01p6 (Linux Home)

Output on console after invoking Gentoo from refind

pietinger · Posted: Sun Nov 17, 2024 11:02 am Post subject:

I can see from your kernel configuration that you have some experience with it. Everything is configured for the console and also for accessing the hard disk. But it could be that you have a special PCI controller. Boot again with the MinimalCD and do a “lspci -nnk” and check if you need the kernel module “vmd” (which is very often used in Intel machines). If so, this is exactly what is missing (# CONFIG_VMD is not set). (See also: https://wiki.gentoo.org/wiki/User:Pietinger/Experimental/Manual_Configuring_Current_Kernel#Accessing_the_Root_Partition )

Also missing:

nagmat84 · Apprentice Joined: 27 Mar 2007 Posts: 266

I assume I do not need the kernel module "vmd". lspci from the installation media does not list it. Here ist the pastebin for lspci: https://pastebin.com/Y0JuUngQ

pietinger · Posted: Sun Nov 17, 2024 11:23 am Post subject:

Uii ... a brand new MeteorLake ... please check with "dmesg | grep firmware" - after booting with our LIVECD (not the minimalCD; because of graphics driver) - needed firmware files, and put it into CONFIG_EXTRA_FIRMWARE. Does this help (together with my already mentioned changes)?
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pietinger · Posted: Sun Nov 17, 2024 11:41 am Post subject:

Maybe you need also: CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON=y
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nagmat84 · Apprentice Joined: 27 Mar 2007 Posts: 266

I enabled CONFIG_VMD and CONFIG_EFI_HANDOVER_PROTOCOL to give it a try. No luck with that. (But I did expect that.)

I will try the Live Image. I am downloading ... However, please note that the Minimal Installation CD is able to boot and uses i915. So I doubt it is a firmware problem, but I will try anyway.

The minimal installation CD loaded the following FW files:

regulatory.db
regulatory.db.p7s
iwlwifi-ma-b0-gf-a0-83.ucode
iwlwifi-ma-b0-gf-a0.pnvm
iwl-debug-yoyo.bin
intel/ibt-0180-0041.sfi
intel/ibt-0180-0041.ddc
intel/sof-ipc4/mtl/sof-mtl.ri

I already have put those FW into my initramfs except for iwl-debug-yoyo.bin, because I wasn't able to find out which Gentoo Package provides that one. Note that the minimal installation CD is able to use FB on i915 without any graphics FW. Hence, I expect the Live Image to show nothing else.

pietinger · Posted: Sun Nov 17, 2024 12:08 pm Post subject:

nagmat84 · Apprentice Joined: 27 Mar 2007 Posts: 266

I tried to other things, both without success:

I compiled my kernel with i915 as a module in case this had been the culprit and loaded to early. There is no difference, the kernel hangs directly after loading the initramfs.

I booted from the Live CD. The module intel_vpu of Live CD tried to load some additional firmware "vpu_37xx.bin, "mtl_vpu.bin" and "intel/vpu/vpu_37xx_v0.0.bin". However this failed as the FW was not available. But this does not seem to be related to graphics.