DMAR and DRHD are related to Intel IOMMU. The kernel docs here [1] detail a bit more information. While this may be a sign of issues, if you're just seeing spammy logs, you may be fine to ignore it.
The logs you're seeing are related to the PCIe device at '01:00.0' (immediately after 'Requested device' in the logs you shared). It will be useful to post more information on this device, which you can do so by running the following command. Note the driver at the end of the output. For more detailed information, like capabilities, you'll need to run as root lspci -v -s 01:00.0 If you just want to make this log go away, you could disable Intel IOMMU for your system and be on with your day. You can either do this in the BIOS by disabling 'Intel VT-d' or by editing the kernel command line [2] in your GRUB config w/ 'intel_iommu=off' [3] (search for 'GRUB_CMDLINE_LINUX' and append ' intel_iommu=off'). For performance-critical applications, this may not be an option as it may force bounce buffering (SWIOTLB) for some devices. However, since this is an older laptop, you should be fine to disable it for day-to-day desktop/low-performance usage. [1] https://www.kernel.org/doc/html/v6.13/arch/x86/iommu.html#basic-stuff [2] https://docs.kernel.org/admin-guide/kernel-parameters.html [3] https://help.ubuntu.com/community/Grub2/Setup#Configuring_GRUB_2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2100287 Title: DMAR DRHD \ DMA Read faults 24.04.2 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/2100287/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
