Please test the kernel, which adds the affected GFX to IOMMU quirk list:
https://people.canonical.com/~khfeng/gfx-no-dmar/
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https://bugs.launchpad.net/bugs/1971146
Title:
Looking at the code though, I notice that igfx=off actually filters all
GFX. Maybe it's just badly named:
#define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) ==
PCI_BASE_CLASS_DISPLAY)
So yeah; have a try with "intel_iommu=igfx_off" on kernel command line.
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> intel_iommu=igfx_off should be enough to resolve issues with GPUs.
Maybe this design dGPU should have IOMMU off.
> @Mario, would you please have some comment in this? thanks
Maybe a new parameter is needed for Intel IOMMU driver to allow
filtering dGPU from IOMMU too?
But this type of error
@Mario, would you please have some comment in this? thanks
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Title:
[radeon] Pictures including wallpaper not showing in kernel
could someone help to verify this kernel on target w/o intel_iommu=off?thanks
https://drive.google.com/drive/folders/1c1p8y265T9urgOwKoJLXaiGUrlKpJlKO?usp=sharing
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There's dmar error, i thought Device[01:00.0] may access a out-of-bound address.
[ 843.730480] DMAR: DRHD: handling fault status reg 3
[ 843.730488] DMAR: [DMA Read NO_PASID] Request device [01:00.0] fault addr
0x6e00 [fault reason 0x0c] non-zero reserved fields in PTE
[ 843.730494] DMAR:
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