1. Please describe the problem: after showing the plymouth splash and some errors briefly it immediately powers off, almost like it was shorted out the screen resolution is also very low when shown 2. What is the Version-Release number of the kernel: 6.13.3, 6.13.4, 6.13.5 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 : 6.12.x is stable 4. Can you reproduce this issue? If so, please provide the steps to reproduce the issue below: every time when booting 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``: kernel-6.14.0-0.rc4.20250226gitac9c34d1e45a.38.fc43 doesn't power off but does hang and never boots 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. hard to get since it powers off/hangs so early 8. extra information This importantly only happens when booted with kernel command line argument `iommu.strict=1`. I suspect this is amdgpu related. This off/hanging behavior is happening when the second dedicated GPU in this laptop gets initialized. Ryzen 5800H with Radeon RX 6700M I have another laptop without a dGPU that also has the hanging behavior on 6.13 and eventually goes completely black screen. Ryzen 7530U I did check here, bz.kernel.org, and bodhi for similar reports but didn't find any.
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