Desktop hangs - Status reg 3.

[Rob Peters]

Kernel 5.15 causes Ubuntu tu budgie 22.04 live cd desktop to hang.
Thinkpad t560 with SSD
Errors are
DMAR DRHD handling fault status reg 3
DMAR [DMA Write NO_PAID] Request dev fault add…
[fault reason 0x05] PTE Write access is not set
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu75
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu-budgie 1670 F.... pipewire-media-
                      ubuntu-budgie 4050 F.... pulseaudio
 /dev/snd/seq: ubuntu-budgie 1669 F.... pipewire
CasperMD5CheckResult: pass
CasperVersion: 1.465
CurrentDesktop: Budgie:GNOME
DistroRelease: Ubuntu 22.04
LiveMediaBuild: Ubuntu-Budgie 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20220118)
MachineType: LENOVO 4384AJ9
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
Package: linux (not installed)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz nomodeset file=/cdrom/preseed/username.seed maybe-ubiquity quiet splash ---
ProcVersionSignature: Ubuntu 5.15.0-17.17-generic 5.15.12
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-17-generic N/A
 linux-backports-modules-5.15.0-17-generic N/A
 linux-firmware 1.204
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: jammy
Uname: Linux 5.15.0-17-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 09/26/2012
dmi.bios.release: 1.82
dmi.bios.vendor: LENOVO
dmi.bios.version: 6MET92WW (1.52 )
dmi.board.name: 4384AJ9
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.ec.firmware.release: 1.33
dmi.modalias: dmi:bvnLENOVO:bvr6MET92WW(1.52):bd09/26/2012:br1.82:efr1.33:svnLENOVO:pn4384AJ9:pvrThinkPadT510:rvnLENOVO:rn4384AJ9:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:sku:
dmi.product.family: ThinkPad T510
dmi.product.name: 4384AJ9
dmi.product.version: ThinkPad T510
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1958318

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Rob Peters (makitso)]

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[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Rob Peters (makitso)]

Adding intel_iommu=off to the boot parameters on live cd prevents the lockup

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Matthew Ruffell (mruffell)]

Hi Rob,

The kernel team enabled Intel IOMMU by default for the 5.15 kernel, since upstream has now turned it on by default.

This happened in:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1951440

We are aware that it will cause boot issues for older hardware that has buggy firmware, and we hope to try get things running at smoothly as we can.

I looked up the firmware for your Thinkpad 510, and it seems version 1.52 is the latest. You might have to run with intel_iommu=off, which can be added to your grub config in /etc/default/grub by appending it to GRUB_CMDLINE_LINUX_DEFAULT, and running "sudo update-grub". On an installed system, anyway.

Thanks,
Matthew

[Rob Peters (makitso)]

Got it. This laptop is primarily used as a test bed so its no big deal.