Forgot the kernel version,sorry..
[0.00] Linux version 5.8.0-34-generic (buildd@lcy01-amd64-015) (gcc
(Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34)
#37~20.04.2-Ubuntu SMP Thu Dec 17 14:53:00 UTC 2020 (Ubuntu
5.8.0-34.37~20.04.2-generic 5.8.18)
[
I've the same bug MOB MSI Tomahawk D450 Max and AMD Ryzen 3400G .
12/19/2020
[0.276768] pci :00:00.2: AMD-Vi: Unable to read/write to IOMMU perf
counter.
[0.276860] pci :00:00.2: can't derive routing for PCI INT A
[0.276861] pci :00:00.2: PCI INT A: not connected
[
Just a note, on the Dell OptiPlex 5055 Ryzen CPU/0P03DX, BIOS 1.1.20
05/31/2019 (AGESA SummitPI-AM4 1.0.0.7a) I am only seeing the interrupt
warning. Performance counters are supported there.
[0.870894] pci :00:00.2: AMD-Vi: IOMMU performance counters
supported
[0.871377] pci
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
It’d be great if Canonical also used their Dell and AMD contacts to get
this fixed.
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Title:
AMD-Vi write error
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AMD-Vi write error
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** Attachment added: "4.20-rc4 dmesg"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216937/+files/4.20-rc4%20dmesg
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** Attachment removed: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216070/+files/dmesg.txt
** Attachment added: "4.18.0-11-generic dmesg"
** Attachment removed: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216918/+files/dmesg.txt
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The issue remains with mainline kernel v4.20-rc4, here is the warnings during
the installation. kgd2kfd_probe failed error seems gone with the new kernel.
Processing triggers for linux-image-unsigned-4.20.0-042000rc4-generic
(4.20.0-042000rc4.201811252331) ...
Just install mainline kernel v4.20-rc4, here is the warnings during the
installation.
Processing triggers for linux-image-unsigned-4.20.0-042000rc4-generic
(4.20.0-042000rc4.201811252331) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating
dmesg info with kernel 4.20.0-042000rc4-generic
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216918/+files/dmesg.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.20
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216070/+files/dmesg.txt
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** Attachment added: "lspci.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216071/+files/lspci.txt
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More info in the bug reported early.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804591
** Attachment added: "uname-a.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804589/+attachment/5216049/+files/uname-a.log
** Tags removed: bot-comment
** Tags added: cosmic
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** Package changed: ubuntu => linux (Ubuntu)
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Title:
AMD-Vi write error
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Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general. It is important that bug reports be filed about source
packages so that people
dmesg and lpci info attched in below post.
https://bugs.launchpad.net/ubuntu/+bug/1804577
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AMD-Vi write error
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