It seems one of the RAM modules in that machine degraded over time -
while memtest86 found no problems in the past, now errors are discovered
within seconds.
It's unclear when the module became faulty, but it's quite plausible
that the observed kernel panics were caused by this and that there's no
The issue started after upgrading from 17.10 to 18.04. However, at the
same time I also upgraded the CPU from an AMD A12-9800 to the AMD Ryzen
7 2700 (with the rest of the system remaining unchanged). I don't have
the older CPU anymore, so I cannot change back for test purposes. Given
the documente
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
Occasional kernel panic on shutdown in ext4 code (dquot_drop)
To ma
apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157450/+files/ProcModules.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157449/+files/ProcInterrupts.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157445/+files/Lspci.txt
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Title:
Occa
apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157444/+files/IwConfig.txt
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Title:
apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157448/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157446/+files/Lsusb.txt
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Title:
Occa
apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157443/+files/CurrentDmesg.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157447/+files/ProcCpuinfo.txt
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apport information
** Tags added: apport-collected bionic
** Description changed:
Occasionally (about once every three weeks) my machine experiences a
kernel panic somewhere in the ext4 code on shutdown (and only on
shutdown).
Ubuntu Version: 18.04, x86-64
Platform: AMD Ryzen R7
apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1779063/+attachment/5157442/+files/CRDA.txt
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Title:
Occasi
add "linux" as affected package.
** Package changed: ubuntu => linux (Ubuntu)
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Title:
Occasional kernel panic on shutdown in ext4 code (dquot_dr
(add the second attachment)
** Attachment added: "screenshot of a kernel panic on June 26th"
https://bugs.launchpad.net/ubuntu/+bug/1779063/+attachment/5157298/+files/panic-june-26.jpg
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Public bug reported:
Occasionally (about once every three weeks) my machine experiences a
kernel panic somewhere in the ext4 code on shutdown (and only on
shutdown).
Ubuntu Version: 18.04, x86-64
Platform: AMD Ryzen R7 2700 on an Asrock AB350M-Pro4 mainboard.
I attached two photos of the panic
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