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Re: kern/52440: nouveau blank screen w/some cards after MSI change in 7.99.64
The following reply was made to PR kern/52440; it has been noted by GNATS.
Subject: Re: kern/52440: nouveau blank screen w/some cards after MSI change
Date: Fri, 1 Sep 2017 11:27:43 +0000
Looking at linux MSI docs, I see this sentence:
Some host chipsets simply don't support MSIs properly. If we're
lucky, the manufacturer knows this and has indicated it in the ACPI
FADT table. In this case, Linux automatically disables MSIs.
Some boards don't include this information in the table and so we have
to detect them ourselves. The complete list of these is found near the
quirk_disable_all_msi() function in drivers/pci/quirks.c.dd
I think we are not doing the ACPI FADT thing
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