This bug was fixed in the package linux - 6.2.0-18.18
---------------
linux (6.2.0-18.18) lunar; urgency=medium
* lunar/linux: 6.2.0-18.18 -proposed tracker (LP: #2011750)
* lunar/linux 6.2 fails to boot on arm64 (LP: #2011748)
- SAUCE: Revert "efi: random: fix NULL-deref when refreshing seed"
- SAUCE: Revert "efi: random: refresh non-volatile random seed when RNG is
initialized"
-- Andrea Righi <[email protected]> Wed, 15 Mar 2023 23:54:18
+0100
** Changed in: linux (Ubuntu Lunar)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/2009283
Title:
linux: CONFIG_SERIAL_8250_MID=y
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Kinetic:
Fix Committed
Status in linux source package in Lunar:
Fix Released
Bug description:
[Impact]
CONFIG_SERIAL_8250_MID=y is required to properly use the serial
console on some platforms that are using the "mid" serial driver (such
as some Intel SoC platforms).
The generic kernel should build this driver statically to make sure we
properly support these platforms.
[Test case]
Boot the Ubuntu generic kernel on a system that is using the "mid"
serial driver (e.g, no PCI serial).
[Fix]
Enable CONFIG_SERIAL_8250_MID=y.
[Regression potential]
Kernel footprint is increased a bit with this change (around +9K), so
we may see little performance regressions at boot time in really small
platforms (additional memory usage is probably negligible), but it is
worth it, otherwise we won't be able to properly support these
platforms.
NOTE: we may want to disable this option in the could kernels and
derivatives and keep it only for the generic.
[Original bug report]
Starting from 5.19 HWE kernel, this option became as dedicated module instead
of being compiled into the kernel.
5.19 hwe-next also has CONFIG_SERIAL_8250_MID=m
On 5.15 it was OK
~$ uname -r
5.19.0-32-generic
$ cat /boot/config-5.19.0-32-generic | grep 8250_MID
CONFIG_SERIAL_8250_MID=m
Please make it CONFIG_SERIAL_8250_MID=y for all the future kernels.
Previous ticket: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1967338
Some discussion:
https://lists.ubuntu.com/archives/kernel-team/2022-March/128690.html
Thanks!
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