I have the same issue, but with a Ryzen 7 1700 with the following setups: Setup 1: Motherboard: Gigabyte B450 Aorus M (Latest BIOS installed) RAM: 32 GB DDR4 Crucial 3000 Mhz GPU1: Sapphire Radeon RX 580 Nitro+ Special Edition 8GB GDDR5 GPU2: Asus Mining Radeon RX 470 4G GDDR5 SSD: 240 GB WD Green
Setup 2: Motherboard: ASRock AB350M Pro4 (Latest BIOS installed) RAM: 32 GB DDR4 Crucial 3000 Mhz GPU1: Sapphire Radeon RX 580 Nitro+ Special Edition 8GB GDDR5 GPU2: Sapphire Radeon RX 550 2G GDDR5 SSD: 240 GB WD Green The issue first started after installing the second GPU on each of the systems. I can't even boot the system, as the errors appear right after BIOS initialization. The errors are like: [exerpt] AMD-Vi: Completion-Wait loop timed out AMD-Vi: Completion-Wait loop timed out AMD-Vi: Completion-Wait loop timed out ... AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb7560] Entering emergecy mode. Exit the shell to continue. Type "journalctl" to view system logs. .... AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb75d0] AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb7700] AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb7630] AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb7660] AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb7690] AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb76c0] AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=22:00.0 address=0x0000000174bb76f0] ... AMD-Vi: Completion-Wait loop timed out AMD-Vi: Event logged [IO_PAGE_FAULT device=23:00.3 domain=0x000 address=0x00000000fffd3990 flags=0x0070] ... Buffer I/O error on dev dm-0, logical block 104857472, async page read Buffer I/O error on dev dm-0, logical block 104857473, async page read Buffer I/O error on dev dm-0, logical block 104857474, async page read Buffer I/O error on dev dm-0, logical block 104857475, async page read Buffer I/O error on dev dm-0, logical block 104857476, async page read Buffer I/O error on dev dm-0, logical block 104857477, async page read ..... After some research I discovered that it is a IOMMU issue. I turned IOMMU off on both motherboards, and I managed to boot the system. I am an architect and I use blender for GPU rendering (this is the idea of having two), but the AMDGPU-Pro driver from the AMD's website (the only one that Blender uses for GPU rendering, as it can't use the open one) affects the way Gnome works on Xorg. It affects in the way that it doesn't start at all, it keeps restarting to the GDM screen... Any ideas? Thanks. ** Attachment added: "the screen photos when the errors appeared" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747463/+attachment/5253632/+files/Photos.zip -- 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/1747463 Title: kernel crashes during boot unless IOMMU is disabled on Ryzen 1800X Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: I'm on a Ryzen 1800X and Biostar B350GT5 on bionic kubuntu. There are lots of AMD-Vi logged events and I get irq crashes or acpi hangups with a 'normal' boot. I got it to boot by disabling IOMMU in the BIOS and adding "iommu=soft" to the kernel booting options in grub. linux can then detect everything properly (all cores) and I've had zero crashes. The only issue is that it's using software IOMMU which could have a performance penalty because it has to copy all the data of some PCI devices to sub 4G regions. Alternatively it boots with the kernel option "acpi=off" but only detects a single core/thread. I attached a kernel log. I believe(d) this might be related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1671360 and https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690085 --- ApportVersion: 2.20.8-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: fixme 1487 F.... pulseaudio /dev/snd/controlC0: fixme 1487 F.... pulseaudio CurrentDesktop: KDE DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=bc971fcc-8e63-4fa5-a149-af4af6c8eece InstallationDate: Installed on 2018-01-31 (4 days ago) InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180131) IwConfig: lo no wireless extensions. enp3s0 no wireless extensions. MachineType: BIOSTAR Group B350GT5 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic.efi.signed root=/dev/mapper/kubuntu--vg-root ro iommu=soft quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13 RelatedPackageVersions: linux-restricted-modules-4.13.0-32-generic N/A linux-backports-modules-4.13.0-32-generic N/A linux-firmware 1.170 RfKill: Tags: bionic Uname: Linux 4.13.0-32-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/30/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.13 dmi.board.asset.tag: None dmi.board.name: B350GT5 dmi.board.vendor: BIOSTAR Group dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.13:bd11/30/2017:svnBIOSTARGroup:pnB350GT5:pvr:rvnBIOSTARGroup:rnB350GT5:rvr:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: None dmi.product.name: B350GT5 dmi.sys.vendor: BIOSTAR Group To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1747463/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
