Jammy regressions

[Jeffrey Lane]

FWIW, iommu also appears to be a culprit on a private bug from one of
our OEM partners that was causing Jammy installs to crash.

We've been working with them and Intel and for that bug in particular
there is a patch in the works from Intel:
https://lore.kernel.org/all/20220622044120.21813-1-baolu.lu@linux.intel.com/T/

That said, I'm not sure if that relates to the previously listed bugs,
but in case it is of interest here, I thought I'd share.

Jeff

On Mon, Jun 27, 2022 at 2:41 AM Daniel van Vugt
<daniel.van.vugt at canonical.com> wrote:
>
> Sounds like intel_iommu=igfx_off should be suggested in each bug so please get
> involved by replying to the bugs:
>
> https://bugs.launchpad.net/ubuntu/+bugs?field.tag=iommu
>
>
> On 24/6/22 9:14 pm, Heinrich Schuchardt wrote:
> > Doesn't intel_iommu=off imply a security risk because a thunderbolt device can
> > access all of the RAM? intel_iommu=igfx_off should be enough to resolve issues
> > with GPUs.
> >
> > On Fri, Jun 24, 2022 at 11:25 AM Daniel van Vugt <daniel.van.vugt at canonical.com
> > <mailto:daniel.van.vugt at canonical.com>> wrote:
> >
> >     Looking at jammy's remaining release regressions:
> >
> >     https://bugs.launchpad.net/ubuntu/?field.searchtext=&search=Search&field.tag=jammy%20regression-release&field.tags_combinator=ALL&orderby=-heat&start=0
> >     <https://bugs.launchpad.net/ubuntu/?field.searchtext=&search=Search&field.tag=jammy%20regression-release&field.tags_combinator=ALL&orderby=-heat&start=0>
> >
> >     It appears 21% of them are solvable (by most reports) using the kernel
> >     parameter
> >     "intel_iommu=off". Is this something the kernel team would consider?
> >
> >     https://launchpad.net/bugs/1958191 <https://launchpad.net/bugs/1958191>
> >     https://launchpad.net/bugs/1965882 <https://launchpad.net/bugs/1965882>
> >     https://launchpad.net/bugs/1959041 <https://launchpad.net/bugs/1959041>
> >     https://launchpad.net/bugs/1971146 <https://launchpad.net/bugs/1971146>
> >
> >     - Daniel
> >
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-- 
Jeff Lane
Engineering Manager
IHV/OEM Alliances and Server Certification

"Entropy isn't what it used to be."