前段时间我愚蠢地添加了 kxstudio ppa。几个月来一切似乎都很好，然后问题开始出现，从那以后一直很痛苦。我提交了几个错误报告，浪费了很多时间才发现它们主要是由于 kxstudio 的“升级”包。我现在希望删除 ppa 以及它安装过的每个包，要么删除以前不存在的包，要么恢复到另一个可用版本（如果它在 ubuntu 存储库中）。
我使用了 ppa-purge，有和没有 -i 开关，我得到这样的东西：
sudo ppa-purge -i kxstudio-team
Updating packages lists
PPA to be removed: kxstudio-team ppa
comm: file 2 is not in sorted order
Package revert list generated:
alsa-tools-gui/oneiric ardour/oneiric audacious/oneiric ffmpeg/oneiric
gstreamer0.10-plugins-bad-multiverse/oneiric
gstreamer0.10-plugins-bad-multiverse-dbg/oneiric ia32-libs/oneiric
jackd/oneiric jackd1/oneiric jackd2/oneiric jackd2-firewire/oneiric
libaudclient2/oneiric libaudcore1/oneiric libavcodec52/oneiric
libavcodec53/oneiric libavcodec-dev/oneiric libavcodec-extra-53/oneiric
libavdevice53/oneiric libavfilter2/oneiric libavformat52/oneiric
libavformat53/oneiric libavformat-dev/oneiric libavformat-extra-53/oneiric
libavutil50/oneiric libavutil51/oneiric libavutil-dev/oneiric
libavutil-extra-51/oneiric libclucene0ldbl/oneiric libffado2/oneiric
libflowcanvas5/oneiric libjack0/oneiric libjack-jackd2-0/oneiric
libmlt++3/oneiric libmlt4/oneiric libmowgli2/oneiric libpostproc51/oneiric
libpostproc52/oneiric libquicktime2/oneiric libswscale0/oneiric
libswscale2/oneiric libswscale-dev/oneiric lmms/oneiric lmms-common/oneiric
lmms-vst/oneiric mplayer/oneiric muse/oneiric wine1.2/oneiric wine1.3/oneiric
zynaddsubfx/oneiric
Disabling kxstudio-team PPA from
/etc/apt/sources.list.d/kxstudio-team-ppa-oneiric.list
Updating packages lists
Unable to find an archive "oneiric" for the package "libavcodec52"
Unable to find an archive "oneiric" for the package "libavformat52"
Unable to find an archive "oneiric" for the package "libavutil50"
Unable to find an archive "oneiric" for the package "libpostproc51"
Unable to find an archive "oneiric" for the package "libswscale0"
Unable to find an archive "oneiric" for the package "lmms-vst"
Unable to find an archive "oneiric" for the package "libavcodec52"
Unable to find an archive "oneiric" for the package "libavformat52"
Unable to find an archive "oneiric" for the package "libavutil50"
Unable to find an archive "oneiric" for the package "libpostproc51"
Unable to find an archive "oneiric" for the package "libswscale0"
Unable to find an archive "oneiric" for the package "lmms-vst"
The following packages will be DOWNGRADED:
ffmpeg gstreamer0.10-plugins-bad-multiverse gstreamer0.10-plugins-bad-multiverse-dbg jackd2{b} jackd2-firewire{b} libavcodec-dev libavcodec-extra-53{b} libavdevice53 libavfilter2 libavformat-dev libavformat-extra-53{b} libavutil-dev
libavutil-extra-51{b} libjack-jackd2-0{b} libpostproc52 libswscale-dev libswscale2 lmms lmms-common wine1.3{b}
The following NEW packages will be installed:
ardour audacious audacious-plugins{a} cmt{a} gtk2-engines-pixbuf{a} jackd1{b} jackd1-firewire{ab} libaubio2{a} libaudclient2 libaudcore1 libavcodec53 libavformat53 libavutil51 libbinio1ldbl{a} libbs2b0{a} libcue1{a} libguess1{a}
libjack0{b} liblrdf0{a} libmlt++3 libmlt-data{a} libmlt4 libmowgli2 libqt3-mt{a} libresid-builder0c2a{a} libsidplay2{a} libsox-fmt-alsa{a} libsox-fmt-base{a} libsox1b{a} libvamp-sdk2{a} muse python-pyasn1{a} python-twisted{a}
python-twisted-conch{a} python-twisted-lore{a} python-twisted-mail{a} python-twisted-news{a} python-twisted-runner{a} python-twisted-words{a} wine1.2
The following packages will be REMOVED:
lmms-vst{u}
0 packages upgraded, 40 newly installed, 20 downgraded, 1 to remove and 5 not upgraded.
Need to get 100 MB/101 MB of archives. After unpacking 292 MB will be used.
The following packages have unmet dependencies:
jackd2-firewire: Conflicts: jackd-firewire which is a virtual package.
libavformat-extra-53: Conflicts: libavformat53 but 4:0.7.2-1ubuntu1 is to be installed.
jackd1-firewire: Conflicts: jackd-firewire which is a virtual package.
wine1.3: Conflicts: wine1.2 but 1.2.3-0ubuntu1 is to be installed.
libjack0: Conflicts: libjack-0.116 which is a virtual package.
libavutil-extra-51: Conflicts: libavutil51 but 4:0.7.2-1ubuntu1 is to be installed.
libjack-jackd2-0: Conflicts: libjack-0.116 which is a virtual package.
Conflicts: libjack0 but 1:0.121.0+svn4469-2ubuntu2 is to be installed.
jackd1: Conflicts: jack-daemon which is a virtual package.
jackd2: Conflicts: jack-daemon which is a virtual package.
libavcodec-extra-53: Conflicts: libavcodec53 but 4:0.7.2-1ubuntu1 is to be installed.
open: 195; closed: 1177; defer: 78; conflict: 276 oThe following actions will resolve these dependencies:
Remove the following packages:
1) acroread
2) ia32-libs-multiarch
3) libacl1
4) libatk1.0-0
5) libattr1
6) libaudio2
7) libavahi-client3
8) libavahi-common3
9) libc6
10) libcairo2
11) libcomerr2
12) libcups2
13) libcupsimage2
14) libcurl3
15) libdatrie1
16) libdb5.1
17) libdbus-1-3
18) libdrm-intel1
19) libdrm-nouveau1a
20) libdrm-radeon1
21) libdrm2
22) libexpat1
23) libffi6
24) libfontconfig1
25) libfreetype6
26) libgcc1
27) libgcrypt11
28) libgdbm3
29) libgdk-pixbuf2.0-0
30) libgl1-mesa-dri
31) libgl1-mesa-glx
32) libglapi-mesa
33) libglib2.0-0
34) libgnutls26
35) libgpg-error0
36) libgssapi-krb5-2
37) libgtk2.0-0
38) libice6
39) libidn11
40) libjasper1
41) libjpeg62
42) libk5crypto3
43) libkeyutils1
44) libkrb5-3
45) libkrb5support0
46) liblcms1
47) libldap-2.4-2
48) libllvm2.9
49) libmng1
50) libnspr4
51) libnss3
52) libpango1.0-0
53) libpciaccess0
54) libpcre3
55) libpixman-1-0
56) libpng12-0
57) libqt4-dbus
58) libqt4-declarative
59) libqt4-designer
60) libqt4-network
61) libqt4-opengl
62) libqt4-qt3support
63) libqt4-script
64) libqt4-scripttools
65) libqt4-sql
66) libqt4-svg
67) libqt4-test
68) libqt4-xml
69) libqt4-xmlpatterns
70) libqtcore4
71) libqtgui4
72) librtmp0
73) libsasl2-2
74) libsasl2-modules
75) libselinux1
76) libsm6
77) libsqlite3-0
78) libssl1.0.0
79) libstdc++6
80) libtasn1-3
81) libthai0
82) libtiff4
83) libuuid1
84) libx11-6
85) libxau6
86) libxcb-render0
87) libxcb-shm0
88) libxcb1
89) libxcomposite1
90) libxcursor1
91) libxdamage1
92) libxdmcp6
93) libxext6
94) libxfixes3
95) libxft2
96) libxi6
97) libxinerama1
98) libxrandr2
99) libxrender1
100) libxss1
101) libxt6
102) libxxf86vm1
103) nspluginviewer
104) nspluginwrapper
105) wine1.3
106) zlib1g
Keep the following packages at their current version:
107) jackd1 [Not Installed]
108) jackd1-firewire [Not Installed]
109) libavcodec53 [Not Installed]
110) libavformat53 [Not Installed]
111) libavutil51 [Not Installed]
112) libjack0 [Not Installed]
Leave the following dependencies unresolved:
113) ia32-libs recommends ia32-libs-multiarch
114) wine1.3-gecko recommends wine1.3
115) libgl1-mesa-glx recommends libgl1-mesa-dri (>= 7.2)
116) libqt4-dbus recommends qdbus (= 4:4.8.1-0ubuntu2~oneiric1~ppa2)
117) libqtgui4 recommends libcups2
Accept this solution? [Y/n/q/?] q
Abandoning all efforts to resolve these dependencies.
Abort.
我很确定其中一些包非常重要，我只是不明白为什么需要删除它们。其他依赖项解决建议删除更多的包！
任何人都可以对此有所了解吗？
首先，使用以下命令手动删除 ppa：
sudo rm /etc/apt/sources.list.d/kxstudio*
现在，使用“apt-pinning”优先考虑当前的发行版，无论软件包版本号如何。首先，创建一个文件：
sudo nano /etc/apt/preferences
并将以下内容复制/粘贴到文件中，将“trusty”替换为您当前的 ubuntu 版本：
Package: *
Pin: release a=trusty*
Pin-Priority: 1001
按CTRL+ O，然后按ENTER保存文件并按CTRL+X退出。
现在，清除特定的 kxstudio 软件包：
sudo apt-get purge kxstudio-artwork kxstudio-default-settings kxstudio-desktop kxstudio-desktop-kde4 kxstudio-welcome
然后，应用降级：
sudo apt-get update
sudo apt-get dist-upgrade
从源修改：http://ispire.me/downgrade-from-debian-sid-to-stable-from-jessie-to-wheezy/