[Bug 1926186] Re: Kernel crashes Raspberry PI 3B+

[Dave Jones]

The Raspberry Pi company are certainly correct that this would be an
Ubuntu / Debian issue (RaspiOS né Raspbian doesn't use flash-kernel to
install its kernel on the boot partition). However, the "/boot/dtb-"
link is worrying (after the dash should come a kernel version) and
suggests something rather more serious is amiss.

Can I ask which Ubuntu image you're using specifically, and exactly how
it's installed? (the fact that f-k is complaining about "operation not
permitted" when it's running as root suggests something like a boot
partition being mounted read-only).

** Changed in: flash-kernel (Ubuntu)
       Status: New => Incomplete

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Title:
  Kernel crashes Raspberry PI 3B+

Status in flash-kernel package in Ubuntu:
  Incomplete

Bug description:
  [sudo] password for astroberry: 
  root at astroberry:/home/astroberry# dpkg --configure -a
  Setting up flash-kernel (3.103ubuntu1~20.10.1) ...
  Using DTB: bcm2710-rpi-3-b-plus.dtb
  Installing /etc/flash-kernel/dtbs/bcm2710-rpi-3-b-plus.dtb into /boot/dtbs//./bcm2710-rpi-3-b-plus.dtb
  Taking backup of bcm2710-rpi-3-b-plus.dtb.
  Installing new bcm2710-rpi-3-b-plus.dtb.
  ln: failed to create symbolic link '/boot/dtb-/bcm2710-rpi-3-b-plus.dtb': Operation not permitted
  dpkg: error processing package flash-kernel (--configure):
   installed flash-kernel package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
   flash-kernel

  Raspberry PI says this is an UBUNTU problem. Ubuntu says this is a
  Raspberry PI issue.

  This is the bug.

  '/boot/dtb-/bcm2710-rpi-3-b-plus.dtb' does not exist. A symbolic link
  cannnot be created with nothing. Also,

  /boot/dtb
  /boot/dtb-1
  /boot/dtb-

  cannot be written into. They are all empty.

  I have multiple Linux machines. This is the only one which fails to
  install Flash Kernel since Nov 20, 2020.

  root at astroberry:/home/astroberry# ls -all /boot/dtb
  total 20
  drwxr-xr-x  2 root root  4096 Sep  2  2020 .
  drwxr-xr-x 11 root root 16384 Dec 31  1969 ..
  root at astroberry:/home/astroberry# ls -all /boot/dtb-1
  total 20
  drwxr-xr-x  2 root root  4096 Oct 20  2019 .
  drwxr-xr-x 11 root root 16384 Dec 31  1969 ..
  root at astroberry:/home/astroberry# ls -all /boot/dtb- 
  total 20
  drwxr-xr-x  2 root root  4096 Apr 22 22:54 .
  drwxr-xr-x 11 root root 16384 Dec 31  1969 ..

  These folders are empty. Nothing can be copied into them

  1.
  root at astroberry:/home/astroberry# lsb_release -rd
  Description:	Ubuntu 20.10
  Release:	20.10

  2.
  root at astroberry:/home/astroberry# apt-cache policy pkgname
  N: Unable to locate package pkgname
  root at astroberry:/home/astroberry# 

  3.
  Installation of Flash Kernel. 

  4. 
  Failed. Dows not install properly. Prevents other installations from completing.

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