Tracked in Github Issues as https://github.com/canonical/cloud-
init/issues/3789
** Bug watch added: github.com/canonical/cloud-init/issues #3789
https://github.com/canonical/cloud-init/issues/3789
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** Changed in: cloud-images
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1896604
Title:
Groovy kernel (5.8.0-1004-aws) creates broken
** Changed in: cloud-init
Status: Triaged => Fix Released
** Changed in: cloud-images
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1896604
This bug was fixed in the package linux-aws - 5.8.0-1007.7
---
linux-aws (5.8.0-1007.7) groovy; urgency=medium
* groovy/linux-aws: 5.8.0-1007.7 -proposed tracker (LP: #1898143)
* Groovy kernel (5.8.0-1004-aws) creates broken /dev/console on i3.metal
instances (LP: #1896604)
** Changed in: linux-aws (Ubuntu)
Status: New => Fix Committed
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Title:
Groovy kernel (5.8.0-1004-aws) creates broken
** Description changed:
+ [Impact]
+
+ Starting with kernel 5.8 the default nr_uarts has been changed from 4 to
+ 2 for amd64, but this seems to affect i3.metal instances in AWS, because
+ ttyS0 is now remapped to ttyS4 and this is breaking tools like cloud-
+ init (and probably something else).
The reason of this problem is that in 5.8 the default amount of nr_uarts
has been changed from 4 to 32. This is causing ttyS0 to be remapped to
ttyS4, breaking the user-space.
The solution is to set back the number of UARTS to 4. I tried to boot
the kernel adding 8250.nr_uarts=4 to the kernel
Thanks Andrea for looking into this.
Added a cloud-init task for tracking.
** Also affects: cloud-init (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: cloud-init (Ubuntu)
** Also affects: cloud-init
Importance: Undecided
Status: New
** Changed in:
Adding some details about this issue. It looks like the real problem is
the serial driver, in fact with a 5.4 kernel we can see the following in
dmesg:
[4.991325] :16:00.0: ttyS0 at MMIO 0xc5a0 (irq = 85,
base_baud = 115200) is a 16550A
With the 5.8 kernel we don't see any message at
** Changed in: linux-aws (Ubuntu)
Assignee: (unassigned) => Andrea Righi (arighi)
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Title:
Groovy kernel (5.8.0-1004-aws)
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