在对一些pulseaudio软件包进行更新后，我的麦克风停止工作。 毕竟Karmic仍然在阿尔法。 我已经向启动板报告了这个错误。
在此期间，我想恢复pulseaudio软件包的更新。 不幸的是，没有一个软件包让我selectSynaptic上的“强制版本”选项。 我想删除它们，然后安装旧的软件包，但是删除脉冲意味着删除名为ubuntu-desktop的软件包，恐怕可能会让事情变得更糟。 我很难find旧版本的软件包，但是我最终将每个* .deb下载到了我的机器上。
这些是根据Synaptic历史的更新。
libpulse-browse0 (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 libpulse-mainloop-glib0 (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 libpulse0 (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-esound-compat (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-module-bluetooth (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-module-gconf (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-module-x11 (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-module-zeroconf (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-utils (1:0.9.15-4ubuntu3) to 1:0.9.16~test4-0ubuntu1 pulseaudio-module-udev (1:0.9.16~test4-0ubuntu1) build议？
如果你不害怕弄脏你的手，最好的办法是：
apt-cache显示软件包名称
它会根据你的sources.list定义显示你可以安装的所有不同版本的软件包。 你会得到这样的东西（这是它的样子）：
root@shiny-desktop:/home/shiny# apt-cache show libpulse-browse0 Package: libpulse-browse0 Status: install ok installed Priority: optional Section: sound Installed-Size: 100 Maintainer: Ubuntu Core Developers <[email protected]> Architecture: i386 Source: pulseaudio Version: 1:0.9.15-4ubuntu2~ppa1 Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.4), libcap1, libdbus-1-3 (>= 1.0.2), libgdbm3, libice6 (>= 1:1.0.0), libpulse0 (= 1:0.9.15-4ubuntu2~ppa1), libsm6, libwrap0 (>= 7.6-4~), libx11-6, libxtst6 Description: PulseAudio client libraries (zeroconf support) PulseAudio, previously known as Polypaudio, is a sound server for POSIX and WIN32 systems. It is a drop in replacement for the ESD sound server with much better latency, mixing/re-sampling quality and overall architecture. . Client libraries used by applications that access a PulseAudio sound server via PulseAudio's native interface. . This package adds support for zeroconf (aka. Avahi, mdns) discovery of PulseAudio sinks and sources by client applications. Homepage: http://www.pulseaudio.org Original-Maintainer: Pulseaudio maintenance team <[email protected]> Package: libpulse-browse0 Priority: optional Section: sound Installed-Size: 144 Maintainer: Ubuntu Core Developers <[email protected]> Original-Maintainer: Pulseaudio maintenance team <[email protected]> Architecture: i386 Source: pulseaudio Version: 1:0.9.14-0ubuntu20.2 Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.4), libcap2 (>= 2.11), libgdbm3, libice6 (>= 1:1.0.0), libpulse0 (>= 0.9.14), libsm6, libx11-6 Filename: pool/main/p/pulseaudio/libpulse-browse0_0.9.14-0ubuntu20.2_i386.deb Size: 31522 MD5sum: d7bf325c04432507420551d7c4e04737 SHA1: 537037b6cdcf2e36ab91fff73a543b2bc9a9d2f6 SHA256: 25c9a83f669f3f14b0fdd59141fc048e3053ccdcae5817f338260342ae1164d0 Description: PulseAudio client libraries (zeroconf support) PulseAudio, previously known as Polypaudio, is a sound server for POSIX and WIN32 systems. It is a drop in replacement for the ESD sound server with much better latency, mixing/re-sampling quality and overall architecture. . Client libraries used by applications that access a PulseAudio sound server via PulseAudio's native interface. . This package adds support for zeroconf (aka. Avahi, mdns) discovery of PulseAudio sinks and sources by client applications. Homepage: http://www.pulseaudio.org Bugs: https://bugs.launchpad.net/ubuntu/+filebug Origin: Ubuntu Task: ubuntu-desktop, kubuntu-dvd-live, edubuntu-desktop, xubuntu-live, mobile-mid, mobile-netbook-remix Package: libpulse-browse0 Priority: optional Section: sound Installed-Size: 144 Maintainer: Ubuntu Core Developers <[email protected]> Original-Maintainer: Pulseaudio maintenance team <[email protected]> Architecture: i386 Source: pulseaudio Version: 1:0.9.14-0ubuntu20 Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.4), libcap2 (>= 2.11), libgdbm3, libice6 (>= 1:1.0.0), libpulse0 (>= 0.9.14), libsm6, libx11-6 Filename: pool/main/p/pulseaudio/libpulse-browse0_0.9.14-0ubuntu20_i386.deb Size: 31516 MD5sum: 63d4937b22f83cff5cc5be101caa3f27 SHA1: bb436fa7bc14eaad31a9f3778f1a887d96e2521d SHA256: 1f3a5e7a4376c0ee406f30a1c5ec03dc5f484dc059ceb61462516bb728c6c1c5 Description: PulseAudio client libraries (zeroconf support) PulseAudio, previously known as Polypaudio, is a sound server for POSIX and WIN32 systems. It is a drop in replacement for the ESD sound server with much better latency, mixing/re-sampling quality and overall architecture. . Client libraries used by applications that access a PulseAudio sound server via PulseAudio's native interface. . This package adds support for zeroconf (aka. Avahi, mdns) discovery of PulseAudio sinks and sources by client applications. Homepage: http://www.pulseaudio.org Bugs: https://bugs.launchpad.net/ubuntu/+filebug Origin: Ubuntu Task: ubuntu-desktop, kubuntu-dvd-live, edubuntu-desktop, xubuntu-live, mobile-mid, mobile-netbook-remix
只需检查可用的不同版本，然后执行以下操作：
apt-get install packagname=version
再次以上面的输出为例：
apt-get install ibpulse-browse0=1:0.9.14-0ubuntu20
正如你可以看到我的pulseaudio是从启动板上的ppa，所以如果我想降级/恢复到由jaunty提供的原始的，我会做上述所有我安装的pulseaudio包。
在/etc/apt/preferences ：
Package: * Pin: release a=jaunty Pin-Priority: 1001
然后aptitude install pulseaudio （和任何其他不会自动降级为依赖的软件包）。
这可能会导致问题的下降（降级不是官方支持或经过充分testing），但这至less会让版本变得轻率。
womble是对的
你还必须确保你在/etc/apt/sources.list中有一些行，用于轻松。 如果你有正确的sources.list行，那么你可以从多个版本中select正确的。
通过固定，您可以设置您偏好的版本。
你可以尝试使用“aptitude”，它有一个基于控制台的用户界面。 转到相关的软件包，在底部，你会看到可用的版本。 select你想要的版本，然后按下键盘上的“+”。
可能会有“破损”的包裹，你可以用“b”循环它们，并在你去的时候修复它们。