[Bug 107898] "kfd: Failed to resume IOMMU for device 1002:15dd" on Raven Ridge

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Sep 12 05:19:59 UTC 2018


https://bugs.freedesktop.org/show_bug.cgi?id=107898

--- Comment #3 from Felix Kühling <fxkuehl at gmx.de> ---
I'm not seeing this problem on my Raven system with 4.19-rc3+ ($ git describe
v4.19-rc3-21-g5e335542de83).

The most likely explanation is that on your system IOMMUv2 is not enabled. That
may be a BIOS setting. If your system BIOS setup doesn't allow you to enable
the IOMMUv2, then you may be out of luck. I'll attach a patch that adds some
extra error messages that should confirm that or point to a different source of
the problem.

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