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[Dimitri John Ledkov <launchpad@xxxxxxxxxxxx>]

Public bug reported:

[s390x] /dev/hwrng present, yet not usable

# cat /dev/hwrng 
cat: /dev/hwrng: No such device

# ls -latr /dev/hwrng 
crw------- 1 root root 10, 183 Mar  8 10:28 /dev/hwrng

# modprobe ap
modprobe: ERROR: could not insert 'ap': No such device

# lszcrypt -VV
lszcrypt: error - cryptographic device driver zcrypt is not loaded!

a) permissions should be more liberal on /dev/hwrng
b) /dev/hwrng probably should not be there, when not actually available... (as per above there is no hwrng card available on the system yet the device is present and is totally unusable)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-11-generic 4.4.0-11.26
ProcVersionSignature: Ubuntu 4.4.0-11.26-generic 4.4.4
Uname: Linux 4.4.0-11-generic s390x
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20-0ubuntu3
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Tue Mar  8 15:30:51 2016
HibernationDevice: RESUME=/dev/mapper/group0-swap
Lspci:
 
Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:
 
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=/dev/mapper/group0-rootfs BOOT_IMAGE=0
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-11-generic N/A
 linux-backports-modules-4.4.0-11-generic  N/A
 linux-firmware                            1.156
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug s390x xenial

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https://bugs.launchpad.net/bugs/1554498

Title:
  [s390x] /dev/hwrng present, yet not usable

Status in linux package in Ubuntu:
  New

Bug description:
  [s390x] /dev/hwrng present, yet not usable

  # cat /dev/hwrng 
  cat: /dev/hwrng: No such device

  # ls -latr /dev/hwrng 
  crw------- 1 root root 10, 183 Mar  8 10:28 /dev/hwrng

  # modprobe ap
  modprobe: ERROR: could not insert 'ap': No such device

  # lszcrypt -VV
  lszcrypt: error - cryptographic device driver zcrypt is not loaded!

  a) permissions should be more liberal on /dev/hwrng
  b) /dev/hwrng probably should not be there, when not actually available... (as per above there is no hwrng card available on the system yet the device is present and is totally unusable)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-11-generic 4.4.0-11.26
  ProcVersionSignature: Ubuntu 4.4.0-11.26-generic 4.4.4
  Uname: Linux 4.4.0-11-generic s390x
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20-0ubuntu3
  Architecture: s390x
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Tue Mar  8 15:30:51 2016
  HibernationDevice: RESUME=/dev/mapper/group0-swap
  Lspci:
   
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
  ProcKernelCmdLine: root=/dev/mapper/group0-rootfs BOOT_IMAGE=0
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-11-generic N/A
   linux-backports-modules-4.4.0-11-generic  N/A
   linux-firmware                            1.156
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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