Arch Linux

Batou

Member

Registered: 2017-01-03

Posts: 259

[SOLVED] "kernel: DMAR: DRHD: handling fault status reg 3"

Hi all,

After upgrading today and installing the new kernel and installing the new Nvidia drivers, I've noticed literally thousands of these sorts of errors in my journal:

 
Sep 28 22:51:39 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:39 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:39 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:39 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:39 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:39 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:39 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:39 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:39 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:39 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:39 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:39 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:40 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:40 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:40 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:40 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:40 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:40 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:40 batou kernel: DMAR: DRHD: handling fault status reg 3
Sep 28 22:51:40 batou kernel: DMAR: [DMA Read] Request device [05:00.0] fault addr fffe0000 [fault reason 06] PTE Read access is not set
Sep 28 22:51:44 batou kernel: dmar_fault: 20 callbacks suppressed

Anyone know what's going on? I googled a bit but haven't been able to nail it down. It only happens when I play videos so I'm assuming it could have something to do with a video driver... not sure. Any help is much appreciated!

 Linux batou 4.13.3-1-ARCH #1 SMP PREEMPT Thu Sep 21 20:33:16 CEST 2017 x86_64 GNU/Linux

Nvidia Driver Version: 384.90 

Thanks so much!

Last edited by Batou (2017-09-29 06:51:38)

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V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,189

Re: [SOLVED] "kernel: DMAR: DRHD: handling fault status reg 3"

IOMMU has been enabled by default, and it's not as "defaultable" as initially hoped. Add

intel_iommu=off

to your kernel parameters.

See also:

https://bbs.archlinux.org/viewtopic.php?id=230156
https://bbs.archlinux.org/viewtopic.php?id=230323
https://bbs.archlinux.org/viewtopic.php?id=230156

for a few similar examples.

Batou

Member

Registered: 2017-01-03

Posts: 259

Re: [SOLVED] "kernel: DMAR: DRHD: handling fault status reg 3"

IOMMU has been enabled by default, and it's not as "defaultable" as initially hoped. Add

intel_iommu=off

to your kernel parameters.

See also:

https://bbs.archlinux.org/viewtopic.php?id=230156
https://bbs.archlinux.org/viewtopic.php?id=230323
https://bbs.archlinux.org/viewtopic.php?id=230156

for a few similar examples.

Thank you! Added the parameter, updated Grub and all the errors are gone! Solved!
PS: I guess I was lucky my machine even booted!

---

Please vote for all the AUR packages you're using. You can mass-vote for all of them by doing: "pacman -Qqm | xargs aurvote -v" (make sure to run "aurvote --configure"  first)