Bug#1112627: linux-image-6.16.3+deb14-amd64: Intel audio no longer works: DMAR: [DMA Write NO_PASID] Request device [00:1b.0] ... non-zero reserved fields in PTE
Hi Francesco,
On Mon, Nov 24, 2025 at 11:25:51PM +0100, Francesco Poli wrote:
> On Thu, 20 Nov 2025 13:15:58 +0100 Salvatore Bonaccorso wrote:
>
> [...]
> > On Sun, Nov 16, 2025 at 05:43:05PM +0100, Salvatore Bonaccorso wrote:
> > > Hi,
> > >
> > > On Wed, Nov 12, 2025 at 10:44:00PM +0100, Francesco Poli wrote:
> [...]
> > > > OK, looking forward to receiving further feedback.
> > > >
> > > > As always, thank you so much for your kind assistance! :-)
> > >
> > > I keep the answer short after we discussed it as promissed.
> > >
> > > You can pass in as well other PCI devices for instance, say maybe pass
> > > a USB controller in, or a NIC. But really if you never used that for
> > > your usecase, our proposal is now to just keep IOMMU disabled (either
> > > via BIOS setting, or via kernel command line parameter) and consider
> > > this (even not solved in the most optimal way) "done".
> >
> > And we agreed in yesterday's meeting since we have a workaround here,
> > and no further ideas to move on and close the bug, which I'm doing
> > now.
>
> OK, I'll keep VT-d disabled in the UEFI configuration, for the time
> being.
>
> Please come back to me, in case some new fact arises in the future.
> Thank you so much!
Sure if we do no forget or get reminded of this particular issue.
What you might try, time permitting is when you update to a new
(major) upstream version re-try with IOMMU enabled and see if things
get better.
Regards,
Salvatore
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