$ cat /boot/config-5.0.0-16-generic | grep LOG_BUF
CONFIG_LOG_BUF_SHIFT=18
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
$ uname -a
Linux doerfel 5.0.0-16-generic #17-Ubuntu SMP Wed May 15 10:54:19 UTC 2019
aarch64 aarch64 aarch64 GNU/Linux
And journal shows complete kernel boot messages, thus this all
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
disco' to 'verification-done-disco'. If the problem still exists, change
the tag
** Changed in: linux (Ubuntu Disco)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1824864
Title:
CONFIG_LOG_BUF_SHIFT set to 14
** Description changed:
+ [Impact]
+
+ * Too small dmsg kernel buf ring size leads to loosing/missing early
+ boot kernel messages which happen before journald starts slurping them
+ up and storing them on disc. This results in messages similar to this
+ one on boot "missed NN kernel messages
** Also affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
CONFIG_LOG_BUF_SHIFT
policy<{
'amd64' : '18',
'arm64' : '14',
'armhf' : '17',
'i386' : '17',
'ppc64el': '17',
's390x' : '17'}>
Please set CONFIG_LOG_BUF_SHIFT to at
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