2 DMAR messages appear after Grub and before Plymouth-like status messages

Started by bullgard4, 2020/02/10, 11:25:16

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bullgard4

Since ~ 2020-02-01 2 DMAR messages appear every time when booting:
QuoteDMAR: DRHD: handling default status reg 3
DMAR: [DMA Write] Request device  [00:02.0] PASID ffffffff fault addr ffffed000 [fault reason 05] PTE Write access  is not set
I can find these 2 messages also using '~$ journalctl -xb'.

I believe I have not done anything that provoked these 2 messages except dist-upgrade.
Do I need to care about them?
I do not use explicitely virtualization let alone virtualization with DMAR.

der_bud

The first 4 search results I get for this all recommend setting 'intel_iommu=off' as kernel parameter. But that was told you in IRC already yesterday - did it not help?
Du lachst? Wieso lachst du? Das ist doch oft so, Leute lachen erst und dann sind sie tot.

bullgard4

Inserting your suggested kernel parameter makes the two messages disappear.

I'd expected this result.
But my question was if I need to care if the two messages appear (in case of not adding an additional kernel parameter).

hendrikL


bullgard4

~$ inxi -v1 -a
System:    Host: siductionbox Kernel: 5.4.17-towo.1-siduction-amd64 x86-64 bits:64                   
                    parameters: BOOT_IMAGE=/boot/vmlinuz-5.4.17-towo.1-siduction-amd64 root =UUID=49afe06...d7 ro quiet                       Desktop: Xfce 4.12.2 Distro: siduction 13.2.1 December - xfce - (201401272206)CPU:          Dual Core: Intel Core i5 M 520 type: MT MCP speed: 1463 MHz min/max: 1199/2400 MHzGraphics:Device-1: Intel Core Processor Integrated Graphics driver: i915 v: kernel                     
                     Display: x11 server: X.Org 1.20.7 driver: modesetting unloaded: fbdev, vesa resolution: 1280x800~60Hz                            OpenGL: renderer: Mesa DRI Intel Ironlake Mobile v: 2.1 Mesa 19.3.3Drives:       Local Storage: total: 465.76 GiB used: 91.13 GiB (19,6%)Info:           Processes: 214 Uptime: 2m Memory: 3.71 GiBused: 770.6 MiB (20.3%) Shell: bash inxi: 3.0.37