[Bug 107426] i915 kernel driver unable to initialize device (-28) ( Xeon E3-1275 v6 ) unless Aperture size <= 128MB

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Jul 30 11:28:41 UTC 2018


https://bugs.freedesktop.org/show_bug.cgi?id=107426

--- Comment #18 from Chris Wilson <chris at chris-wilson.co.uk> ---
The BIOS is responsible for setting up the IO regions of the gfx PCI device,

        Region 2: Memory at <unassigned> (64-bit, prefetchable)

is the mappable aperture PCI BAR.

If you can get some specifics on how userspace fails with only 128MiB, we
should follow that up as well.

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