This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1956780
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1956780
Title:
5.15 stuck at boot on c4.large
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
c4.large instances are stuck at boot with kernel 5.15.0-15.15.
[Test case]
Simply deploy a c4.large instance and install the latest jammy kernel
(5.15.0-15.15).
[Fix]
It looks like the offending commit is the following:
02c70033b98b ("PCI/MSI: Mask MSI-X vectors only on success")
Reverting the commit fixes the problem.
[Regression potential]
It looks like the commit was fixing a potential breakage with broken
Marvell NVME devices, so we may see crashes in presence of these
devices. However, reverting the commit we are simply restoring the
previous behavior, so potential regressions should be limited to these
broken devices.
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