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lenovo/thinkpad/l14/amd: switch to soft iommu mode to prevent mmcblk kernel panic

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Julian Stecklina 2021-08-25 23:27:37 +02:00
parent 49f1d1e1f8
commit 9ff8606e7e
1 changed files with 6 additions and 3 deletions
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lenovo/thinkpad/l14/amd/default.nix
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@ -12,10 +12,13 @@
# either crashes or is not able to attach to the GPU depending on
# the kernel version. I've seen no issues with the IOMMU disabled.
#
# BIOS version 1.13 claims to fix IOMMU issues, but we leave the
# IOMMU off to avoid a sad experience for those people that drew
# BIOS version 1.13 fixes the IOMMU issues, but we leave the IOMMU
# in software mode to avoid a sad experience for those people that drew
# the short straw when they bought their laptop.
"iommu=off"
#
# Do not set iommu=off, because this will cause the SD-Card reader
# driver to kernel panic.
"iommu=soft"
];
# As of writing this, Linux 5.8 is the oldest kernel that is still