This bug was fixed in the package linux-raspi - 5.4.0-1036.39
---
linux-raspi (5.4.0-1036.39) focal; urgency=medium
* focal/linux-raspi: 5.4.0-1036.39 -proposed tracker (LP: #1927614)
* Raspberry Pi kernel config doesn't match generic for NFT, breaks LXD
(LP: #1927108)
-
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-raspi (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1926911
Title:
** Changed in: linux-raspi (Ubuntu Focal)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1926911
Title:
hctosys not reading hardware clock on CM4
To manage
** Description changed:
+ [Impact]
+
+ At boot, the kernel does not synchronize the system clock from an RTC,
+ if the driver that manages the RTC device is built as a module.
+
+ [Test Case]
+
+ $ dmesg|grep rtc
+ [1.593561] hctosys: unable to open rtc device (rtc0)
+ [ 10.767256]
https://github.com/snapcore/core-initrd/issues/17
** Bug watch added: github.com/snapcore/core-initrd/issues #17
https://github.com/snapcore/core-initrd/issues/17
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hirsute does not have Ubuntu Core images ;)
It seems to be solvable via a simple defconfig change according to:
https://github.com/raspberrypi/linux/issues/4205
We have at least one UC customer implementing a CM4 baseboard with TPM
for Full disk encryption and secureboot in UC20, for this the
Hirsute looks fine:
$ uname -a
Linux rpi-cm4-rev1d0-e428 5.11.0-1005-raspi #5 SMP PREEMPT Mon Apr 19 09:04:31
UTC 2021 armv7l armv7l armv7l GNU/Linux
$ sudo dmesg | grep rtc
[0.00] Kernel command line: coherent_pool=1M 8250.nr_uarts=1
snd_bcm2835.enable_compat_alsa=0
Seem focal:
$ uname -a
Linux rpi-cm4-rev1d0-e428 5.4.0-1034-raspi #37-Ubuntu SMP PREEMPT Mon Apr 12
23:14:49 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux
$ sudo dmesg | grep rtc
[0.00] Kernel command line: coherent_pool=1M 8250.nr_uarts=1
snd_bcm2835.enable_compat_alsa=0
ogra@CM4:~$ snap list pi-kernel
Name VersionRev Tracking Publisher Notes
pi-kernel 5.4.0-1035.38 282 20/edge canonical✓ kernel
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Which kernel?
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https://bugs.launchpad.net/bugs/1926911
Title:
hctosys not reading hardware clock on CM4
To manage notifications about this bug go to:
** Description changed:
There is a timing issue when using the CM4 with the official CM4 IO
baseboard.
The CM4 baseboard comes with a built in rtc and a battery holder by
default, to enable it a devicetree overlay needs to be enabled and a
matching module gets loaded ...
$ tail
11 matches
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