jeffrey.lane at canonical.com
Mon Jun 27 22:38:05 UTC 2022
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:
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.
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:
> 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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