Hi Lu,
In recent kernels, i915 graphics with intel_iommu=on has been
giving me a blank screen.
git bisect points at your patch ab96746aaa34
"iommu/vt-d: Clean up pasid quirk for pre-production devices"
Either one of the pre-production devices made it into my Dell
laptop, or there's something else wrong with the patch.
Reverting that patch gives me text console and X11 graphics;
keeping it in yields a blank screen on boot.
My laptop is a Dell Inc. Precision 7710/0PMJX2, BIOS 1.15.4 12/08/2017
CPU is Intel(R) Core(TM) i7-6920HQ CPU @ 2.90GHz
(family: 0x6, model: 0x5e, stepping: 0x3)
Peter C
--
Dr Peter Chubb Tel: +61 2 9490 5852 http://ts.data61.csiro.au/
Trustworthy Systems Group Data61, CSIRO (formerly NICTA)
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