Public bug reported:

Hello, I can not umount a cifs share with umount /media/share.

I alwas have to use umount -f -l /media/share.

We have round about 260 installations with Automatic software
distribution which need to unmount the share or it get stuck.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-154-generic 5.4.0-154.171
ProcVersionSignature: Ubuntu 5.4.0-154.171-generic 5.4.240
Uname: Linux 5.4.0-154-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116,  1 Jul  7 10:50 seq
 crw-rw---- 1 root audio 116, 33 Jul  7 10:50 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu27.27
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: pass
CloudArchitecture: x86_64
CloudID: none
CloudName: none
CloudPlatform: none
CloudSubPlatform: config
Date: Fri Jul  7 10:57:48 2023
InstallationDate: Installed on 2021-12-15 (569 days ago)
InstallationMedia: Ubuntu-Server 20.04.3 LTS "Focal Fossa" - Release amd64 
(20210824)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
 
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: VMware, Inc. VMware Virtual Platform
PciMultimedia:
 
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 svgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-154-generic 
root=/dev/mapper/vg0--ubuntu-lv0--system ro maybe-ubiquity
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-154-generic N/A
 linux-backports-modules-5.4.0-154-generic  N/A
 linux-firmware                             1.187.39
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/12/2020
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.name: 440BX Desktop Reference Platform
dmi.board.vendor: Intel Corporation
dmi.board.version: None
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd11/12/2020:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: VMware Virtual Platform
dmi.product.version: None
dmi.sys.vendor: VMware, Inc.

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


** Tags: amd64 apport-bug focal package-from-proposed uec-images

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https://bugs.launchpad.net/bugs/2026358

Title:
  can not umount cifs share

Status in linux package in Ubuntu:
  New

Bug description:
  Hello, I can not umount a cifs share with umount /media/share.

  I alwas have to use umount -f -l /media/share.

  We have round about 260 installations with Automatic software
  distribution which need to unmount the share or it get stuck.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-154-generic 5.4.0-154.171
  ProcVersionSignature: Ubuntu 5.4.0-154.171-generic 5.4.240
  Uname: Linux 5.4.0-154-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jul  7 10:50 seq
   crw-rw---- 1 root audio 116, 33 Jul  7 10:50 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.11-0ubuntu27.27
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CasperMD5CheckResult: pass
  CloudArchitecture: x86_64
  CloudID: none
  CloudName: none
  CloudPlatform: none
  CloudSubPlatform: config
  Date: Fri Jul  7 10:57:48 2023
  InstallationDate: Installed on 2021-12-15 (569 days ago)
  InstallationMedia: Ubuntu-Server 20.04.3 LTS "Focal Fossa" - Release amd64 
(20210824)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  Lsusb-t:
   
  Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
  MachineType: VMware, Inc. VMware Virtual Platform
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 svgadrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-154-generic 
root=/dev/mapper/vg0--ubuntu-lv0--system ro maybe-ubiquity
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-154-generic N/A
   linux-backports-modules-5.4.0-154-generic  N/A
   linux-firmware                             1.187.39
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/12/2020
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd11/12/2020:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.

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