Bug 2399838

Summary: 6.16.9 kernel does not boot on Thinkpad T14 Gen 6 Lunar Lake
Product: [Fedora] Fedora Reporter: Mihai Harpau <mihai>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 42CC: acaringi, adscvr, agurenko, airlied, hdegoede, hpa, josef, kernel-maint, linville, masami256, mchehab, ptalbert, steved, suraj.ghimire7
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
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Clone Of: Environment:
Last Closed: 2025-09-29 17:26:17 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
dmesg log none

Description Mihai Harpau 2025-09-26 21:16:53 UTC
1. Please describe the problem:
Thinkpad T14 Gen 6 Lunar Lake Ultra 7 258V does not boot on 6.16.9 kernel.

2. What is the Version-Release number of the kernel:
kernel-6.16.9-200.fc42

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :
Previous 6.16.8-200.fc42 works fine

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:
- install by sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-36f34c04c2
- reboot
- boot with 6.16.9
- goot a black screen where you cannot do anything
- but that laptop is not totally frozen(caps_lock led is still working)

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:
I didn't tried yet

6. Are you running any modules that not shipped with directly Fedora's kernel?:
No

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

Reproducible: Always

Comment 1 Mihai Harpau 2025-09-26 21:18:59 UTC
Created attachment 2107711 [details]
dmesg log

Comment 2 Mihai Harpau 2025-09-27 13:51:09 UTC
6.17.0-0.rc7.250924gcec1e6e5d1ab3.58.fc44.x86_64 boots fine

Comment 3 Gurenko Alex 2025-09-29 16:55:05 UTC
I would assume Lunar Lake can **only** be booted with Xe driver, hence it's the same as: https://bugzilla.redhat.com/show_bug.cgi?id=2399738

Comment 4 Mihai Harpau 2025-09-29 17:10:54 UTC
@agurenko I suppose we can make it a duplicate, right?

Comment 5 Mihai Harpau 2025-09-29 17:26:17 UTC

*** This bug has been marked as a duplicate of bug 2399738 ***