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1. Please describe the problem: Unable to boot beyond GRUB boot menu 2. What is the Version-Release number of the kernel: 5.11.3-50.fc33, 5.11.4-50.fc33 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 : 5.10.21-200.fc33 works fine as do any previous 5.10 series kernels 4. Can you reproduce this issue? If so, please provide the steps to reproduce the issue below: Not just me affected by this issue, there is someone else in the test day results that is experiencing it, and the bug I have linked from the Linux Kernel bugzilla. Seems to be affecting the AMD STONEY APUs from all the reports I've seen so far. 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``: yes 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. Unable to get the kernel logs for this issue as I can't even boot into the operating system. The only option I have is to hit the power button.
Note that after the kernel is selected in the grub menu, it flicks to a white cursor on a black background. I can't hit ctrl+alt+del nor can I switch to any tty terminal. this is what i mean by 'the only option is to hit the power button'.
still an issue with 5.11.5-50.fc33
tried the options provided by the kernel team to the user in the referenced kernel bugzilla bug, nomodeset and amdgpu.dc=[0|1] makes no difference to the boot status
I second this, faced the same problem with both 5.11 and 5.12 (rc) kernels as well. This is clearly a regression since latest 5.10 releases (5.10.20, 5.10.21 & 5.10.22) with 5.9 and 5.8 releases worked totally fine. I also have Stoney chip in my configuration: https://linux-hardware.org/?probe=f40d786ac2
As per the attached Kernel bug, further testing on my part shows this is an issue all the way back to 5.11-rc1. I am troubleshooting with the Kernel team to try and find the commit that introduced the issue.
After further testing with the Kernel team, I can now boot 5.12-rc3 with the iommu-fixes branch of the git tree mentioned here: https://bugzilla.kernel.org/show_bug.cgi?id=212133#c23. I imagine this will be made available in an upcoming kernel release and pushed to 5.11 as well. These are specifically AMD IOMMU fixes.
I have discovered I can properly boot 5.11 series kernels with iommu=soft as per https://www.kernel.org/doc/Documentation/x86/x86_64/boot-options.txt, This means that until the fix provided by Joerg Roedel is upstreamed, we at least have a workaround.
This is still an issue with 5.11.7-200 on Fedora 33
Same here on a Lenovo Ideacentre 310S-08ASR (AMD A9-9425 CPU) running the 5.11.7-200.fc33.x86_64 kernel. Adding iommu=soft works around the problem.
Looks like the fixes are now available in 5.12-rc4, but not 5.11 yet
*** Bug 1941232 has been marked as a duplicate of this bug. ***
5.11.9-200.fc33 fixes this issue (currently in Koji, soon to be in updates testing)
5.11.9-200.fc33 has resolved the problem for me.
Same as comment #13 ^^ - latest kernel 5.11.9-200 (f33 x86) has resolved the problem.
Essentially likewise to the two above comments: I didn't get around to updating until 5.11.10-200.fc33.x86_64 had shown up, but with it the problem has been resolved (no more need for the iommu=soft workaround).
Closing this, since multiple people have confirmed that this is fixed in 5.11.9 / 5.11.10 and newer.
Interesting, I still have this happening on F34 with kernel 5.11.11, although it looks like a race as occasionally it works. 5.11.10 works consistently well.