Hi Rauno,
Thanks for reporting this bug; nice finding on pci=noats.
$ grep -A1 noats ~/git/linux/Documentation/admin-guide/kernel-parameters.txt
noats [PCIE, Intel-IOMMU, AMD-IOMMU]
do not use PCIe ATS (and IOMMU device IOTLB).
Wondering if the amd gfx drivers with ats/iommu (ie, w/out pci=noats) causes
memory corruption:
The screenshot in #1 shows that initramfs unpacking failed -- say,
something corrupted the compressed initramfs image loaded in memory --
and this happened closely to when AMD-Vi failed to access an IOMMU perf
count(er? I guess.)
And it seems to be graphics related, not just ats/iommu code alone,
which prints 'AMD-Vi' (it's in linux/drivers/iommu/amd/) since recovery
mode, with 'nomodeset', works fine.
When you boot in recovery mode, do you see initramfs unpacking failed as
well? (please check 'dmesg | grep -i initramfs')
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https://bugs.launchpad.net/bugs/1901024
Title:
Crash on startup using linux 5.8.0-25
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