I am also seeing this with current Linux (5.7-rc7) on an MSI B350M MORTAR and a Dell OptiPlex 5055. Both are AMD Ryzen systems, so this seems to affect all of those.
The IOMMU subsystem maintainer responded to report this issue to the mainboard vendor, so they fix the firmware [1]. Everybody experiencing this, please contact the mainboard vendor to fix this. I already did, and the more contact them, the higher it will rise in their ticketing system. [1]: https://lists.linuxfoundation.org/pipermail/iommu/2018-July/028925.html -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1804589 Title: AMD-Vi write error Status in linux package in Ubuntu: Confirmed Bug description: AMD-Vi write error. [ 0.777408] AMD-Vi: Unable to write to IOMMU perf counter. [ 0.777529] pci 0000:00:00.2: can't derive routing for PCI INT A [ 0.777530] pci 0000:00:00.2: PCI INT A: not connected [ 0.778000] iommu: Adding device 0000:00:01.0 to group 0 [ 0.778231] iommu: Adding device 0000:00:01.2 to group 1 [ 0.778463] iommu: Adding device 0000:00:01.6 to group 2 [ 0.778690] iommu: Adding device 0000:00:08.0 to group 3 [ 0.778914] iommu: Adding device 0000:00:08.1 to group 4 [ 0.778940] iommu: Adding device 0000:00:08.2 to group 3 [ 0.779154] iommu: Adding device 0000:00:14.0 to group 5 [ 0.779176] iommu: Adding device 0000:00:14.3 to group 5 [ 0.779444] iommu: Adding device 0000:00:18.0 to group 6 [ 0.779474] iommu: Adding device 0000:00:18.1 to group 6 [ 0.779495] iommu: Adding device 0000:00:18.2 to group 6 [ 0.779516] iommu: Adding device 0000:00:18.3 to group 6 [ 0.779544] iommu: Adding device 0000:00:18.4 to group 6 [ 0.779566] iommu: Adding device 0000:00:18.5 to group 6 [ 0.779586] iommu: Adding device 0000:00:18.6 to group 6 [ 0.779606] iommu: Adding device 0000:00:18.7 to group 6 [ 0.779835] iommu: Adding device 0000:15:00.0 to group 7 [ 0.779869] iommu: Adding device 0000:15:00.1 to group 7 [ 0.779903] iommu: Adding device 0000:15:00.2 to group 7 [ 0.779933] iommu: Adding device 0000:16:04.0 to group 7 [ 0.779956] iommu: Adding device 0000:16:05.0 to group 7 [ 0.779977] iommu: Adding device 0000:16:06.0 to group 7 [ 0.779999] iommu: Adding device 0000:16:07.0 to group 7 [ 0.780031] iommu: Adding device 0000:1b:00.0 to group 7 [ 0.780058] iommu: Adding device 0000:1c:00.0 to group 7 [ 0.780296] iommu: Adding device 0000:2e:00.0 to group 8 [ 0.780592] iommu: Adding device 0000:38:00.0 to group 9 [ 0.780672] iommu: Using direct mapping for device 0000:38:00.0 [ 0.780767] iommu: Adding device 0000:38:00.1 to group 10 [ 0.780807] iommu: Adding device 0000:38:00.2 to group 10 [ 0.780847] iommu: Adding device 0000:38:00.3 to group 10 [ 0.780887] iommu: Adding device 0000:38:00.4 to group 10 [ 0.780934] iommu: Adding device 0000:38:00.6 to group 10 [ 0.780965] iommu: Adding device 0000:39:00.0 to group 3 [ 0.781307] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40 [ 0.781308] AMD-Vi: Extended features (0x4f77ef22294ada): [ 0.781308] PPR NX GT IA GA PC GA_vAPIC [ 0.781311] AMD-Vi: Interrupt remapping enabled [ 0.781311] AMD-Vi: virtual APIC enabled [ 0.781534] AMD-Vi: Lazy IO/TLB flushing enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
