[Bug 1864992] Re: depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-14-generic/modules.builtin.bin'

Wed Mar 11 12:54:12 UTC 2020

Alright, afaict what is happening is this:

In Focal I first faced this issue when upgrading kmod to
26+20191223-1ubuntu1.. but my reproducer was "update-initramfs" only.
The issue is that both: mkinitramfs (initramfs-tools) needs a patch to
work with recent 5.x kernels:

# mkinitramfs (initramfs-tools)

# Copy in modules.builtin and modules.order (not generated by depmod)
# and modules.builtin.bin (generated by depmod, but too late to avoid
# error messages as in #948257)
for x in modules.builtin modules.builtin.bin modules.order; do
        if [ -f "${MODULESDIR}/${x}" ]; then
                cp -p "${MODULESDIR}/${x}" "${DESTDIR}${MODULESDIR}/${x}"
        fi
done

All other Ubuntu versions that might use a HWE kernel will need a SRU of
that patch.

But thats not the only way to trigger the issue as it seems...

I was able to reproduce the issue when doing:

(k)rafaeldtinoco at kmodissuefocal:~$ apt-get install linux-
image-5.4.0-14-generic linux-headers-5.4.0-14-generic linux-modules-
extra-5.4.0-14-generic

while I had kernel 5.4.0-18-generic installed.

Setting up linux-modules-5.4.0-14-generic (5.4.0-14.17) ...
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-14-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-14-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-14-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-14-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-14-generic/modules.builtin.bin' 

The same happened when installing linux-modules-5.4.0-9-generic AND when
uninstalling and re-installing 5.4.0-18-generic. So now I'll reproduce
this second issue.. and I'm marking LP: #1863261 that SRU is needed for
that case.

For this case.. it turns out that postinst script for linux-modules is
executing:

$ sudo depmod -a -F /boot/System.map-5.4.0-18-generic 5.4.0-18-generic

for the first time when
/lib/modules/5.4.0-18-generic/modules.builtin.bin DOES NOT exist yet.

an easy way to reproduce is this:

$ sudo rm /lib/modules/5.4.0-18-generic/modules.builtin.bin

and then:

$ sudo depmod -a -F /boot/System.map-5.4.0-18-generic 5.4.0-18-generic                                             
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-18-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-18-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-18-generic/modules.builtin.bin'
depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could not open builtin file '/lib/modules/5.4.0-18-generic/modules.builtin.bin'

the second time you run same command, it will not have these errors
messages because "modules.builtin.bin" file will already have been
created.

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Title:
  depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could
  not open builtin file
  '/lib/modules/5.4.0-14-generic/modules.builtin.bin'

Status in curtin:
  Invalid
Status in subiquity:
  New
Status in kmod package in Ubuntu:
  Confirmed

Bug description:
  During a Focal install from the ISO image several errors like:

  depmod: ERROR: ../libkmod/libkmod.c:515 lookup_builtin_file() could
  not open builtin file
  '/lib/modules/5.4.0-14-generic/modules.builtin.bin'

  are logged in curtin's install logs. The installed system boots and
  works fine, but the error is clearly something we want to get rid of.

  At first glance this seems related to:

  https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1863261

  but the version of initramfs-tools in both the installer and installed
  system (checked with `chroot /target dpkg -l initramfs-tools` during
  the installation) is 0.136ubuntu1, which should contain Rafael's fix
  for that bug. I wonder if the update-initramfs diversion has a role
  here.

  I verified this happens at least on amd64 and arm64. I'm attaching the full install logs for a amd64 installation.
  --- 
  ProblemType: Bug
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-14-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.11-0ubuntu18
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: N/A
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
  CasperVersion: 1.439
  DistroRelease: Ubuntu 20.04
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  LiveMediaBuild: Ubuntu-Server 20.04 LTS "Focal Fossa" - Alpha amd64 (20200225)
  Lsusb:
   Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  Lsusb-t:
   /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
   /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
   /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
       |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 480M
  MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  Package: linux (not installed)
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
  ProcFB: 0 qxldrmfb
  ProcKernelCmdLine: initrd=/casper/initrd quiet  --- maybe-ubiquity
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-14-generic N/A
   linux-backports-modules-5.4.0-14-generic  N/A
   linux-firmware                            1.186
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  Tags:  focal uec-images
  Uname: Linux 5.4.0-14-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  _MarkForUpload: True
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.13.0-1
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-q35-4.2
  dmi.modalias: dmi:bvnSeaBIOS:bvr1.13.0-1:bd04/01/2014:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-4.2:cvnQEMU:ct1:cvrpc-q35-4.2:
  dmi.product.name: Standard PC (Q35 + ICH9, 2009)
  dmi.product.version: pc-q35-4.2
  dmi.sys.vendor: QEMU

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