Public bug reported:

When ~/.config/pulse is on an tmpfs file-system, changes made to the .tdb files 
by pulseaudio (e.g having changed the volume level) do not cause the mtime to 
be updated. They update as expected on a standard ext4 file-system. The actual 
file content is confirmed to be changing.

This results in rsync believing the files are unchanged.


A similar sounding issue exists on the freebsd mailing lists and it looks like  
patch was 
submitted to resolve it.

ProblemType: Bug
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: amd64
Date: Thu Jan 12 12:48:37 2017
Dependencies:
 adduser 3.113+nmu3ubuntu3
 apt-utils 1.0.1ubuntu2.17
 base-passwd 3.5.33
 busybox-initramfs 1:1.21.0-1ubuntu1                                            
                                                                                
                   
 coreutils 8.21-1ubuntu5.4                                                      
                                                                                
                   
 cpio 2.11+dfsg-1ubuntu1.2                                                      
                                                                                
                   
 dbus 1.6.18-0ubuntu4.4                                                         
                                                                                
                   
 debconf 1.5.51ubuntu2                                                          
                                                                                
                   
 debconf-i18n 1.5.51ubuntu2                                                     
                                                                                
                   
 debianutils 4.4                                                                
                                                                                
                   
 dmsetup 2:1.02.77-6ubuntu2                                                     
                                                                                
                   
 dpkg 1.17.5ubuntu5.7                                                           
                                                                                
                   
 e2fslibs 1.42.9-3ubuntu1.3                                                     
                                                                                
                   
 e2fsprogs 1.42.9-3ubuntu1.3                                                    
                                                                                
                   
 findutils 4.4.2-7                                                              
                                                                                
                   
 gcc-4.8-base 4.8.4-2ubuntu1~14.04.3                                            
                                                                                
                   
 gcc-4.9-base 4.9.3-0ubuntu4                                                    
                                                                                
                   
 gettext-base 0.18.3.1-1ubuntu3                                                 
                                                                                
                   
 grub-common 2.02~beta2-9ubuntu1.12                                             
                                                                                
                   
 grub-gfxpayload-lists 0.6                                                      
                                                                                
                   
 grub-pc 2.02~beta2-9ubuntu1.12                                                 
                                                                                
                   
 grub-pc-bin 2.02~beta2-9ubuntu1.12                                             
                                                                                
                   
 grub2-common 2.02~beta2-9ubuntu1.12                                            
                                                                                
                   
 ifupdown 0.7.47.2ubuntu4.4                                                     
                                                                                
                   
 initramfs-tools 0.103ubuntu4.5                                                 
                                                                                
                   
 initramfs-tools-bin 0.103ubuntu4.5                                             
                                                                                
                   
 initscripts 2.88dsf-41ubuntu6.3
 insserv 1.14.0-5ubuntu2
 iproute2 3.12.0-2ubuntu1
 isc-dhcp-client 4.2.4-7ubuntu12.8
 isc-dhcp-common 4.2.4-7ubuntu12.8
 klibc-utils 2.0.3-0ubuntu1.14.04.2
 kmod 15-0ubuntu6
 libacl1 2.2.52-1
 libapparmor1 2.8.95~2430-0ubuntu5.3
 libapt-inst1.5 1.0.1ubuntu2.17
 libapt-pkg4.12 1.0.1ubuntu2.17
 libasprintf0c2 0.18.3.1-1ubuntu3
 libattr1 1:2.4.47-1ubuntu1
 libaudit-common 1:2.3.2-2ubuntu1
 libaudit1 1:2.3.2-2ubuntu1
 libblkid1 2.20.1-5.1ubuntu20.9
 libbz2-1.0 1.0.6-5
 libc6 2.19-0ubuntu6.9
 libcap2 1:2.24-0ubuntu2
 libcgmanager0 0.24-0ubuntu7.5
 libcomerr2 1.42.9-3ubuntu1.3
 libdb5.3 5.3.28-3ubuntu3
 libdbus-1-3 1.6.18-0ubuntu4.4
 libdebconfclient0 0.187ubuntu1
 libdevmapper1.02.1 2:1.02.77-6ubuntu2
 libdrm2 2.4.67-1ubuntu0.14.04.1
 libexpat1 2.1.0-4ubuntu1.3
 libfreetype6 2.5.2-1ubuntu2.5
 libfuse2 2.9.2-4ubuntu4.14.04.1
 libgcc1 1:4.9.3-0ubuntu4
 libgpm2 1.20.4-6.1
 libjson-c2 0.11-3ubuntu1.2
 libjson0 0.11-3ubuntu1.2
 libklibc 2.0.3-0ubuntu1.14.04.2
 libkmod2 15-0ubuntu6
 liblocale-gettext-perl 1.05-7build3
 liblzma5 5.1.1alpha+20120614-2ubuntu2
 libmount1 2.20.1-5.1ubuntu20.9
 libncurses5 5.9+20140118-1ubuntu1
 libncursesw5 5.9+20140118-1ubuntu1
 libnih-dbus1 1.0.3-4ubuntu25
 libnih1 1.0.3-4ubuntu25
 libpam-modules 1.1.8-1ubuntu2.2
 libpam-modules-bin 1.1.8-1ubuntu2.2
 libpam-runtime 1.1.8-1ubuntu2.2
 libpam-systemd 204-5ubuntu20.20
 libpam0g 1.1.8-1ubuntu2.2
 libpcre3 1:8.31-2ubuntu2.3
 libplymouth2 0.8.8-0ubuntu17.1
 libpng12-0 1.2.50-1ubuntu2.14.04.2
 libprocps3 1:3.3.9-1ubuntu2.2
 libselinux1 2.2.2-1ubuntu0.1
 libsemanage-common 2.2-1
 libsemanage1 2.2-1
 libsepol1 2.2-1ubuntu0.1
 libslang2 2.2.4-15ubuntu1
 libss2 1.42.9-3ubuntu1.3
 libstdc++6 4.8.4-2ubuntu1~14.04.3
 libsystemd-daemon0 204-5ubuntu20.20
 libsystemd-login0 204-5ubuntu20.20
 libtext-charwidth-perl 0.04-7build3
 libtext-iconv-perl 1.7-5build2
 libtext-wrapi18n-perl 0.06-7
 libtinfo5 5.9+20140118-1ubuntu1
 libudev1 204-5ubuntu20.20
 libustr-1.0-1 1.0.4-3ubuntu2
 libuuid1 2.20.1-5.1ubuntu20.9
 libxtables10 1.4.21-1ubuntu1
 lsb-base 4.1+Debian11ubuntu6.2
 makedev 2.3.1-93ubuntu1
 module-init-tools 15-0ubuntu6
 mount 2.20.1-5.1ubuntu20.9
 mountall 2.53
 multiarch-support 2.19-0ubuntu6.9
 netbase 5.2
 os-prober 1.63ubuntu1.1
 passwd 1:4.1.5.1-1ubuntu9.2
 perl-base 5.18.2-2ubuntu1.1
 plymouth 0.8.8-0ubuntu17.1
 plymouth-theme-ubuntu-text 0.8.8-0ubuntu17.1
 procps 1:3.3.9-1ubuntu2.2
 psmisc 22.20-1ubuntu2
 sensible-utils 0.0.9
 systemd-services 204-5ubuntu20.20
 sysv-rc 2.88dsf-41ubuntu6.3
 sysvinit-utils 2.88dsf-41ubuntu6.3
 tar 1.27.1-1ubuntu0.1
 tzdata 2016j-0ubuntu0.14.04
 ucf 3.0027+nmu1
 udev 204-5ubuntu20.20
 upstart 1.12.1-0ubuntu4.2
 util-linux 2.20.1-5.1ubuntu20.9
 uuid-runtime 2.20.1-5.1ubuntu20.9
 zlib1g 1:1.2.8.dfsg-1ubuntu1
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2015-09-01 (498 days ago)
InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
Package: linux-image-4.4.0-59-generic 4.4.0-59.80~14.04.1
PackageArchitecture: amd64
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 LC_COLLATE=C
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.4.0-59.80~14.04.1-generic 4.4.35
SourcePackage: linux-lts-xenial
Tags:  trusty
Uname: Linux 4.4.0-59-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
_MarkForUpload: True

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-4.4.0-59-generic 4.4.0-59.80~14.04.1
ProcVersionSignature: Ubuntu 4.4.0-59.80~14.04.1-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: amd64
Date: Thu Jan 12 12:49:06 2017
InstallationDate: Installed on 2015-09-01 (498 days ago)
InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: linux-lts-xenial
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lts-xenial (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1655953

Title:
  mtime not updating on tmpfs filesystem

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