[SOLVED] ThinkPad T14 Gen5 - blank screen

[manwe_]

Hi *.

I'm switching from Toshiba Dynabook i7-1165G7 to ThinkPad T14 Gen5 Ultra 7 155U. First time after switching hardware I have just freeze when booting kernel. No matter if i boot from rEFInd (last message about using secure boot and then nothing), kexec from Ubuntu Live (simply black screen) or straight from UEFI (same black screen). Tested with 6.6.38 and 6.9.10 (config » https://pastebin.com/EveAi0Zc). Tried with just two options "vga=normal nomodeset" to force text mode and see kernel panic (if it happens) - still nothing. Any ideas where to start debuging? Ubuntu live works fine, so has to be kernel-related.

[kimchi_sg]

[manwe_]

Here's lspci: https://bpa.st/NCVA

I've already linked kernel config, gentoo-linux-6.9.10 with two patches: add-acs-overrides and more-uarches-for-kernel-6.8-rc4+ (I'm using CONFIG_MNATIVE_INTEL=y).

[manwe_]

I'm tyring to eliminate things one by one but still nothing. Pure gentoo-linux-6.9.10 (without patches, CONFIG_GENERIC_CPU=y, config » https://paste.gentoo.zip/J7p7QVi8), without secure boot (kernel is signed, but still…) and all I have is frozen screen https://i.imgur.com/RpKe8sM.jpeg

[lekto]

Maybe firmware (sys-kernel/linux-firmware) is missing or is outdated? Can you ssh into machine and look into dmesg?

[pietinger]

manwe_

I see you have a very new meteor lake ... and there is no module i915 loaded:

[pietinger]

P.S.:

I've only just seen that you have the same thing as me:

[manwe_]

[lekto]

[pietinger]

[manwe_]

That's fucked up… With this firmware file system freezes the same way even via Gentoo LiveCD kexec. Without it kexec works fine. Only difference is "i915/mtl_guc_70.bin" (linux-firmware-20240709-r1) in CONFIG_EXTRA_FIRMWARE https://paste.gentoo.zip/kugMwZ2j

So looks like it's definitely related to GPU. But what mixeup of options should I make, no idea. Tomorrow I'll check ubuntu live cd (works every time, even X) what drivers are being used.

[pietinger]

What happens if you give these kernel command line parameters (together WITH firmware files):

[manwe_]

I've checked ubuntu live with 6.8 kernel. It loads few other files for i915:

[pietinger]

manwe_

maybe check in Ubuntu if the i915 module was loaded (->udev) with special parameters ?

(keep all firmware modules you have seen in Ubuntu in your CONFIG_EXTRA_FIRMWARE=)
_________________
https://wiki.gentoo.org/wiki/User:Pietinger

[manwe_]

[toralf]

I do still run a rather old kernel at my 1 1/2 years old P14s Thinkpad: 6.6.43 w/o problems (amd64/23.0/split-usr/hardened, KDE): https://paste.gentoo.zip/IocFQDHY

[pietinger]

What happens if you:
1. delete the kernel command line parms I have given you, AND
2. enable: # CONFIG_INTEL_MEI_GSC and # CONFIG_INTEL_MEI_GSC_PROXY

... yes, I have read somewhere (cannot remember) that the new graphics from intel wants MEI ... and I have seen this in the Ubuntu syslog:

[pietinger]

P.S.: Maybe you will need also PXP:

[manwe_]

[pietinger]

[manwe_]

[pietinger]

[manwe_]

We've got something! Those params worked at least to some degree. Unfortunately it scrolls to quick, I'll try to record slo-mo movie. Here's where boot process ends. No panic, no nothing, just stops. https://postimg.cc/3kKL3jxY I don't have anything RAID-related in that laptop, one nVME with GPT partition table.

-- update:
One step further. Function raid6_select_algo was caused by CONFIG_RAID6_PQ=y, which was selected by BTRFS, so I've removed BTRFS from kernel. Now it stops few lines further: https://postimg.cc/xNXYCky1

Here's shitty quality (thank you, Samsung) slo-mo of the first boot, with RAID6: https://photos.app.goo.gl/9e68PZdFcP43HUPb8

-- update2:
with "acpi=off acpi_osi=" it scrolls until i915: https://postimg.cc/sQV7tzPc

[pietinger]

[manwe_]

Not much difference with hugepages, it just says