Comment 17 for bug 1924624

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DiagonalArg (diagonalarg) wrote : Re: After upgrade to 5.8.0-49/5.8.0-50 with Intel graphics (gen7, Haswell/Ivy Bridge) a lot of glitches render screen unusable

Perhaps this is related? That's my report, and I got rid of it by using the intel_iommu=on kernel parameter, but that introduced another error.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925126