Ubuntu server:
Description: Ubuntu 19.10
Release: 19.10
Installed kernel:
linux-generic:
Installed: 5.3.0.42.36
(I could not figure out what package to select in the 'in what package did you find this bug' chooser)
Expected behavior: ECC RAM is detected and utilized
Result instead:
Error in dmesg at boot:
EDAC amd64: Error: F0 not found, device 0x1460 (broken BIOS?) (more in the attached KernelErrors.log)
Kernel 5.3 is missing ECC support for some families of AMD Ryzen 3rd gen CPUs.
Support is added via these two commits in the mainline tree:
https://github.com/torvalds/linux/commit/e53a3b267fb0a79db9ca1f1e08b97889b22013e6
https://github.com/torvalds/linux/commit/3e443eb353eda6f4b4796e07f2599683fa752f1d
The second commit actually adds the missing support, but it relies on the first commit: a partial refactor of the AMD ECC code.
I tested myself, followed the instructions at https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel to build my own kernel, cherry-picked the two above commits, and have working ECC support on my self-built kernel:
Linux smaug 5.3.0-43-generic #36 SMP Sat Mar 21 02:33:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux:
EDAC MC: Ver: 3.0.0
EDAC amd64: Node 0: DRAM ECC enabled.
EDAC amd64: F17h_M70h detected (node 0).
EDAC MC: UMC0 chip selects:
EDAC amd64: MC: 0: 0MB 1: 0MB
EDAC amd64: MC: 2: 16384MB 3: 16384MB
EDAC MC: UMC1 chip selects:
EDAC amd64: MC: 0: 0MB 1: 0MB
EDAC amd64: MC: 2: 16384MB 3: 16384MB
EDAC amd64: using x16 syndromes.
EDAC amd64: MCT channel count: 2
EDAC MC0: Giving out device to module amd64_edac controller F17h_M70h: DEV 0000:00:18.3 (INTERRUPT)
EDAC PCI0: Giving out device to module amd64_edac controller EDAC PCI controller: DEV 0000:00:18.0 (POLLED)
AMD64 EDAC driver v3.5.0
If this could be included in a future hardware support kernel release, that would be very helpful. I am unsure what the policy is for including this kind of backport in non-LTS kernels, though I know the LTS releases have hardware support updates that include this type of fix.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu8.6
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: XFCE
DistroRelease: Ubuntu 19.10
InstallationDate: Installed on 2020-03-20 (6 days ago)
InstallationMedia: Ubuntu-Server 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
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: 0 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-42-generic root=UUID=89cfcc61-dbca-43d3-9a2e-5961df9ae5b4 ro
ProcVersionSignature: Ubuntu 5.3.0-42.34-generic 5.3.18
RelatedPackageVersions:
linux-restricted-modules-5.3.0-42-generic N/A
linux-backports-modules-5.3.0-42-generic N/A
linux-firmware 1.183.4
RfKill:
Tags: eoan uec-images
Uname: Linux 5.3.0-42-generic x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirt lxd plugdev sudo
_MarkForUpload: False
dmi.bios.date: 10/03/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P3.30
dmi.board.name: X470D4U2-2T
dmi.board.vendor: ASRockRack
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.30:bd10/03/2019:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRockRack:rnX470D4U2-2T:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
Attachment was missed during initial report