Re: Bug#995932: upgrade-reports: 3.0 USB ports unusable after upgrade

From	Paul Gevers <elbrus@debian.org>
Newsgroups	linux.debian.kernel
Subject	Re: Bug#995932: upgrade-reports: 3.0 USB ports unusable after upgrade
Date	2021-10-14 15:40 +0200
Message-ID	<D897H-3lc-5@gated-at.bofh.it> (permalink)
References	<D897H-3lc-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Control: reassign -1 src:linux

Hi,

On 08-10-2021 13:06, Lorenzo Iannuzzi wrote:
> - Were there any problems with the system after upgrading?
> USB 3.0 ports stop working at boot or as soon as I plug more than one device.
> Devices attached to them are not recognized and not listed with lsusb. I had no
> problems before the upgrade.
> On logs I found:
> kernel: DMAR: DRHD: handling fault status reg 2
> kernel: DMAR: [DMA Read] Request device [04:00.0] PASID ffffffff fault add
> r fff7e000 [fault reason 06] PTE Read access is not set
> kernel: xhci_hcd 0000:04:00.0: WARNING: Host System Error
> 
> I can avoid this issue adding "iommu=soft" to kernel parameters at boot.

The signs of this issue hint towards the kernel, hence reassigning there.

Paul

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Re: Bug#995932: upgrade-reports: 3.0 USB ports unusable after upgrade Paul Gevers <elbrus@debian.org> - 2021-10-14 15:40 +0200

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