Re: kern/52440: nouveau blank screen w/some cards after MSI change in 7.99.64

[coypu%sdf.org@localhost]

The following reply was made to PR kern/52440; it has been noted by GNATS.

From: coypu%sdf.org@localhost
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/52440: nouveau blank screen w/some cards after MSI change
 in 7.99.64
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