Bug 109219

Summary:

iommu_intel=on + i915 incompatibility in 4.17, 4.19.13 and drm-tip

Product:

DRI

Reporter:

e+i915

Component:

DRM/Intel

Assignee:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Status:

RESOLVED WORKSFORME

QA Contact:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Severity:

normal

Priority:

medium

CC:

e+i915, intel-gfx-bugs, joonas.lahtinen

Version:

DRI git

Hardware:

Other

OS:

All

URL:

https://lore.kernel.org/lkml/20181227114948.ev4b3jte3ubsc5us@dcvr/T/

Whiteboard:

Triaged

i915 platform:

ILK

i915 features:

Attachments:

Description	Flags
dmesg output with without iommu_intel set	none
dmesg output with iommu_on	none
Debian 4.17 config	none

Description e+i915 2019-01-04 00:55:28 UTC

Created attachment 142968 [details]
dmesg output with without iommu_intel set

iommu_intel=on fails with i915 on x201 Thinkpad.

Thread on LKML: https://lore.kernel.org/lkml/20181227114948.ev4b3jte3ubsc5us@dcvr/T/

Comment 1 e+i915 2019-01-04 00:56:17 UTC

Created attachment 142969 [details]
dmesg output with iommu_on

Comment 2 e+i915 2019-01-04 00:57:12 UTC

Created attachment 142970 [details]
Debian 4.17 config

Comment 3 Lakshmi 2019-07-03 08:28:00 UTC

My apologies for responding on this issue so late.

@Joonas, any suggestion how to proceed with this issue?

Comment 4 Lakshmi 2019-08-28 10:07:03 UTC

> 
> Thread on LKML:
> https://lore.kernel.org/lkml/20181227114948.ev4b3jte3ubsc5us@dcvr/T/
In the attached logs I can not find the same warnings as mentioned in link.

Reporter, do you still see the kernel panics? Can you reproduce the issue with drmtip? (https://cgit.freedesktop.org/drm-tip).

Comment 5 Chris Wilson 2019-09-07 17:21:53 UTC

Note that Ironlake igfx + iommu is known to be a bad mix -- the gpu cannot be active while iommu is remapped, it seems doubtful that we are able to do that or if that is the only workaround required.

Comment 6 Lakshmi 2019-10-03 06:47:27 UTC

No response from the user for more than 2 months. Resolving this issue as WORKSFORME.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.