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Date:      Sun, 15 Jul 2018 18:02:35 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 229791] ig4 autoload breaks S3 (ig4iic_pci0 controller error during attach-2)
Message-ID:  <bug-229791-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229791

            Bug ID: 229791
           Summary: ig4 autoload breaks S3 (ig4iic_pci0 controller error
                    during attach-2)
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: aliovx@gmail.com

In reference to the commit r336141, which adds PNP table for the ig4 module,
when the module gets loaded on my Thinkpad T480, it drops the following
messages:=20

ig4iic_pci0: <Intel Sunrise Point-LP I2C Controller-0> mem
0xec154000-0xec154fff at device 21.0 on pci0
ig4iic_pci0: Using MSI
ig4iic_pci0: controller error during attach-2
iicbus0: <Philips I2C bus> on ig4iic_pci0

Now with the module loaded, S3 suspend (which works perfectly without the
module being loaded) fails, last message I see is

[drm:wait_for_engines] Failed to idle engines, declaring wedged!

and then the system hangs.

--=20
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