[Bug 2068739] Re: [SRU] use earlycon=sbi on the kernel command line

[Launchpad Bug Tracker]

This bug was fixed in the package livecd-rootfs - 24.04.72

---------------
livecd-rootfs (24.04.72) noble; urgency=medium

  [ Heinrich Schuchardt ]
  * riscv64: use earlycon=sbi on command line (LP: #2068739)

  [ Philip Roche ]
  * Revert removal of unminimize call in server builds (LP: #2069828)

livecd-rootfs (24.04.71) noble; urgency=medium

  * Re-enable ability to build HyperV desktop images (LP: #2064280)

livecd-rootfs (24.04.70) noble; urgency=medium

  [ Łukasz 'sil2100' Zemczak ]
  * Add experimental support for building ubuntu-core-desktop installer images
    (LP: #2063203)

  [ Philip Roche ]
  * No longer install LXD snap in unminimize script (LP: #2066905)

 -- Philip Roche <phil.roche at canonical.com>  Mon, 24 Jun 2024 14:24:52
+0100

** Changed in: livecd-rootfs (Ubuntu Noble)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2068739

Title:
  [SRU] use earlycon=sbi on the kernel command line

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Noble:
  Fix Released

Bug description:
  [ Impact ]

  On RISC-V boards we have specified 'earlycon' on the command line to
  provide early kernel log output. This does not work with current
  kernels.

  We have to specify 'earlycon=sbi' to use the kernel driver for the SBI
  debug console extension which is available since OpenSBI v1.3.

  
  [ Test Plan ]

  To reproduce the problem append 'console=ttyS0' to the kernel command
  line. This will result in writing at 9600 baud in the 'late' console
  while the early console is expected at 115200 baud.

  With 'earlycon=sbi' the early messages are shown.

  For testing the Nezha D1 board can be used with our preinstalled
  server image.

  [ Where problems could occur ]

  The early console might not work and users might see messages late.

  [ Other Info ]
   
  n/a

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