You have been subscribed to a public bug:

apt-cache policy does not reflect priority set in
/etc/apt/preferences.d/*

```
$ cat apt-bug.txt 
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Oct 22 08:38:38 2020
Dependencies:
 adduser 3.118ubuntu2
 apt 2.1.10
 apt-utils 2.1.10
 ca-certificates 20200601
 debconf 1.5.74
 debconf-i18n 1.5.74
 dpkg 1.20.5ubuntu2
 gcc-10-base 10.2.0-13ubuntu1
 gpgv 2.2.20-1ubuntu1
 krb5-locales 1.17-10
 libacl1 2.2.53-8
 libapt-pkg6.0 2.1.10
 libaudit-common 1:2.8.5-3ubuntu1
 libaudit1 1:2.8.5-3ubuntu1
 libbz2-1.0 1.0.8-4ubuntu2
 libc6 2.32-0ubuntu3
 libcap-ng0 0.7.9-2.2
 libcom-err2 1.45.6-1ubuntu1
 libcrypt1 1:4.4.16-1ubuntu1
 libdb5.3 5.3.28+dfsg1-0.6ubuntu3
 libffi8ubuntu1 3.4~20200819gead65ca871-0ubuntu3
 libgcc-s1 10.2.0-13ubuntu1
 libgcrypt20 1.8.5-5ubuntu2
 libgmp10 2:6.2.0+dfsg-6ubuntu1
 libgnutls30 3.6.15-4ubuntu2
 libgpg-error-l10n 1.38-2
 libgpg-error0 1.38-2
 libgssapi-krb5-2 1.17-10
 libhogweed6 3.6-2
 libidn2-0 2.3.0-1
 libk5crypto3 1.17-10
 libkeyutils1 1.6.1-2ubuntu1
 libkrb5-3 1.17-10
 libkrb5support0 1.17-10
 liblocale-gettext-perl 1.07-4
 liblz4-1 1.9.2-2
 liblzma5 5.2.4-1ubuntu1
 libnettle8 3.6-2
 libnsl2 1.3.0-0ubuntu3
 libnss-nis 3.1-0ubuntu4
 libnss-nisplus 1.3-0ubuntu4
 libp11-kit0 0.23.21-2build1
 libpam-modules 1.3.1-5ubuntu6
 libpam-modules-bin 1.3.1-5ubuntu6
 libpam0g 1.3.1-5ubuntu6
 libpcre2-8-0 10.34-7
 libseccomp2 2.4.3-1ubuntu4
 libselinux1 3.1-2
 libsemanage-common 3.1-1
 libsemanage1 3.1-1
 libsepol1 3.1-1
 libssl1.1 1.1.1f-1ubuntu4
 libstdc++6 10.2.0-13ubuntu1
 libsystemd0 246.6-1ubuntu1 [origin: Ubuntu]
 libtasn1-6 4.16.0-2
 libtext-charwidth-perl 0.04-10
 libtext-iconv-perl 1.7-7
 libtext-wrapi18n-perl 0.06-9
 libtirpc-common 1.2.6-1build1
 libtirpc3 1.2.6-1build1
 libudev1 246.6-1ubuntu1 [origin: Ubuntu]
 libunistring2 0.9.10-4
 libzstd1 1.4.5+dfsg-4
 openssl 1.1.1f-1ubuntu4
 passwd 1:4.8.1-1ubuntu6
 perl-base 5.30.3-4
 tar 1.30+dfsg-7
 ubuntu-keyring 2020.06.17.1
 zlib1g 1:1.2.11.dfsg-2ubuntu4
DistroRelease: Ubuntu 20.10
InstallationDate: Installed on 2020-10-12 (9 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Beta amd64 (20200930)
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair system76_io
Package: apt 2.1.10
PackageArchitecture: amd64
ProcCpuinfoMinimal:
 processor      : 11
 vendor_id      : GenuineIntel
 cpu family     : 6
 model          : 158
 model name     : Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
 stepping       : 10
 microcode      : 0xd6
 cpu MHz                : 3897.986
 cache size     : 9216 KB
 physical id    : 0
 siblings       : 12
 core id                : 5
 cpu cores      : 6
 apicid         : 11
 initial apicid : 11
 fpu            : yes
 fpu_exception  : yes
 cpuid level    : 22
 wp             : yes
 flags          : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb 
rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology 
nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 
ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt 
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch 
cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi 
flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms 
invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves 
dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d
 vmx flags      : vnmi preemption_timer invvpid ept_x_only ept_ad ept_1gb 
flexpriority tsc_offset vtpr mtf vapic ept vpid unrestricted_guest ple pml 
ept_mode_based_exec
 bugs           : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds 
swapgs itlb_multihit srbds
 bogomips       : 4399.99
 clflush size   : 64
 cache_alignment        : 64
 address sizes  : 39 bits physical, 48 bits virtual
 power management:
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
SourcePackage: apt
Tags: groovy third-party-packages
Uname: Linux 5.8.0-25-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
_MarkForUpload: True
modified.conffile..etc.apport.crashdb.conf:
 # map crash database names to CrashDatabase implementations and URLs
 
 default = 'ubuntu'
 
 def get_oem_project():
     '''Determine OEM project name from Distribution Channel Descriptor
 
     Return None if it cannot be determined or does not exist.
     '''
     try:
         dcd = open('/var/lib/ubuntu_dist_channel').read()
         if dcd.startswith('canonical-oem-'):
             return dcd.split('-')[2]
     except IOError:
         return None
 
 databases = {
     'ubuntu': {
         'impl': 'launchpad',
         'bug_pattern_url': 
'http://people.canonical.com/~ubuntu-archive/bugpatterns/bugpatterns.xml',
         'dupdb_url': 
'http://people.canonical.com/~ubuntu-archive/apport-duplicates',
         'distro': 'ubuntu',
         'problem_types': ['Bug', 'Package', 'Crash'],
         'escalation_tag': 'bugpattern-needed',
         'escalated_tag': 'bugpattern-written',
     },
     'canonical-oem': {
         'impl': 'launchpad',
         'bug_pattern_url': 
'http://people.canonical.com/~ubuntu-archive/bugpatterns/bugpatterns.xml',
         'project': get_oem_project(),
     },
     'debug': {
         # for debugging
         'impl': 'memory',
         'bug_pattern_url': '/tmp/bugpatterns.xml',
         'distro': 'debug'
     },
 }
 
mtime.conffile..etc.apport.crashdb.conf: 2020-10-19T18:45:48.855219
```

Example:

```
Get:9 http://ppa.launchpad.net/system76/pop/ubuntu groovy/main amd64 Packages 
[44.4 kB]
Get:10 http://ppa.launchpad.net/system76/pop/ubuntu groovy/main Translation-en 
[18.1 kB]
Hit:11 http://mirrors.vcea.wsu.edu/ubuntu groovy InRelease   
Hit:12 http://mirrors.vcea.wsu.edu/ubuntu groovy-updates InRelease             
Hit:13 http://mirrors.vcea.wsu.edu/ubuntu groovy-backports InRelease           
Get:14 http://mirrors.vcea.wsu.edu/ubuntu groovy-security InRelease [88.4 kB]  
Hit:15 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed InRelease            
Hit:17 https://packages.microsoft.com/ubuntu/18.04/prod bionic InRelease       
Hit:18 http://archive.canonical.com/ubuntu groovy InRelease                    
Hit:16 https://packagecloud.io/slacktechnologies/slack/debian jessie InRelease 
Fetched 151 kB in 6s (26.2 kB/s)
Reading package lists... Done
Building dependency tree       
Reading state information... Done
26 packages can be upgraded. Run 'apt list --upgradable' to see them.

avery@ChubbyChipmunk:/etc/apt/preferences.d$ apt-cache policy

Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu focal/main amd64 
Packages
     release v=20.04,o=LP-PPA-webupd8team-y-ppa-manager,a=focal,n=focal,l=Y PPA 
Manager,c=main,b=amd64
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/system76/pop/ubuntu groovy/main amd64 Packages
     release v=20.10,o=LP-PPA-system76-pop,a=groovy,n=groovy,l=Pop!_OS 
PPA,c=main,b=amd64
     origin ppa.launchpad.net
 500 https://packagecloud.io/slacktechnologies/slack/debian jessie/main amd64 
Packages
     release 
v=1,o=packagecloud.io/slacktechnologies/slack,a=jessie,n=jessie,l=slack,c=main,b=amd64
     origin packagecloud.io
 500 http://apt.pop-os.org/proprietary groovy/main amd64 Packages
     release v=20.10,o=system76,a=groovy,n=groovy,l=System76,c=main,b=amd64
     origin apt.pop-os.org
 500 https://download.mono-project.com/repo/ubuntu stable-focal/main amd64 
Packages
     release 
v=20.04,o=XamarinFocal,a=stable-focal,n=focal,l=Xamarin-Stable-Focal,c=main,b=amd64
     origin download.mono-project.com
 500 https://packages.microsoft.com/ubuntu/18.04/prod bionic/main amd64 Packages
     release o=microsoft-ubuntu-bionic-prod 
bionic,a=bionic,n=bionic,l=microsoft-ubuntu-bionic-prod bionic,c=main,b=amd64
     origin packages.microsoft.com
 500 http://ppa.launchpad.net/linuxuprising/shutter/ubuntu groovy/main amd64 
Packages
     release v=20.10,o=LP-PPA-linuxuprising-shutter,a=groovy,n=groovy,l=Shutter 
screenshot tool and dependencies,c=main,b=amd64
     origin ppa.launchpad.net
 500 http://dl.google.com/linux/chrome/deb stable/main amd64 Packages
     release v=1.0,o=Google LLC,a=stable,n=stable,l=Google,c=main,b=amd64
     origin dl.google.com
 500 
https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04
  Packages
     release 
o=obs://build.opensuse.org/devel:kubic:libcontainers:stable/xUbuntu_20.04,n=xUbuntu_20.04,l=devel:kubic:libcontainers:stable,c=
     origin download.opensuse.org
 500 http://packages.microsoft.com/ubuntu/18.04/mssql-server-2019 bionic/main 
amd64 Packages
     release o=mssql-server-2019-bionic 
bionic,a=bionic,n=bionic,l=mssql-server-2019-bionic bionic,c=main,b=amd64
     origin packages.microsoft.com
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/main i386 Packages
     release v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=main,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/main amd64 Packages
     release v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=main,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/multiverse i386 Packages
     release 
v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=multiverse,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/multiverse amd64 
Packages
     release 
v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=multiverse,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/restricted i386 Packages
     release 
v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=restricted,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/restricted amd64 
Packages
     release 
v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=restricted,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/universe i386 Packages
     release 
v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=universe,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-proposed/universe amd64 Packages
     release 
v=20.10,o=Ubuntu,a=groovy-proposed,n=groovy,l=Ubuntu,c=universe,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-security/universe i386 Packages
     release 
v=20.10,o=Ubuntu,a=groovy-security,n=groovy,l=Ubuntu,c=universe,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-security/universe amd64 Packages
     release 
v=20.10,o=Ubuntu,a=groovy-security,n=groovy,l=Ubuntu,c=universe,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-security/main i386 Packages
     release v=20.10,o=Ubuntu,a=groovy-security,n=groovy,l=Ubuntu,c=main,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy-security/main amd64 Packages
     release v=20.10,o=Ubuntu,a=groovy-security,n=groovy,l=Ubuntu,c=main,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://archive.canonical.com/ubuntu groovy/partner amd64 Packages
     release v=20.10,o=Canonical,a=groovy,n=groovy,l=Partner 
archive,c=partner,b=amd64
     origin archive.canonical.com
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/multiverse i386 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=multiverse,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/multiverse amd64 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=multiverse,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/universe i386 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=universe,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/universe amd64 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=universe,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/restricted i386 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=restricted,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/restricted amd64 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=restricted,b=amd64
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/main i386 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=main,b=i386
     origin mirrors.vcea.wsu.edu
 500 http://mirrors.vcea.wsu.edu/ubuntu groovy/main amd64 Packages
     release v=20.10,o=Ubuntu,a=groovy,n=groovy,l=Ubuntu,c=main,b=amd64
     origin mirrors.vcea.wsu.edu
Pinned packages:
```

The nothing.

```
$ apt-cache policy apt

apt:
  Installed: 2.1.10
  Candidate: 2.1.10
  Version table:
 *** 2.1.10 500
        500 http://mirrors.vcea.wsu.edu/ubuntu groovy/main amd64 Packages
        100 /var/lib/dpkg/status

$ lsb_release -rd

Description:    Ubuntu 20.10
Release:        20.10

$ uname -a

Linux ChubbyChipmunk 5.8.0-25-generic #26-Ubuntu SMP Thu Oct 15 10:30:38 UTC 
2020 x86_64 x86_64 x86_64 GNU/Linux
```

What is going on ?!

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

-- 
apt preferences files do nothing re: apt-cache policy
https://bugs.launchpad.net/bugs/1901053
You received this bug notification because you are a member of Ubuntu Touch 
seeded packages, which is subscribed to apt in Ubuntu.

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