所更新 我的内核目前是
Linux scv 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
但我知道它应该是
3.13.0-45-generic #74为什么我的电脑在执行
sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade
的时候， 没有 默认更新，有什么想法？我怎样才能解决这个问题？
编辑：
执行
ema@scv:~$ cat /etc/issue Ubuntu 14.04.2 LTS \n \l报告14.04.2显然...
EDIT2:
在我的另一台电脑上，用更新鲜的Ubuntu 14.04安装，我得到了 3.13.0-45-generic #74 ...
EDIT3:
所有repos/ppa
ema@scv:~$ grep -h ^deb /etc/apt/sources.list /etc/apt/sources.list.d/* deb http://gb.archive.ubuntu.com/ubuntu/ Trusty主要受限 deb-src http://gb.archive.ubuntu.com/ubuntu/ trusty main restricted deb http://gb.archive.ubuntu.com/ubuntu/ trusty-updates main restricted deb-src http://gb.archive.ubuntu.com/ubuntu/ trusty-updates main restricted deb http://gb.archive.ubuntu.com/ubuntu/ trusty universe deb-src http://gb.archive.ubuntu.com/ubuntu/ trusty universe deb http://gb.archive.ubuntu.com/ubuntu/ trusty-updates universe deb-src http://gb.archive.ubuntu.com/ubuntu/ trusty-updates universe deb http://gb.archive.ubuntu.com/ubuntu/ Trusty multiverse deb-src http://gb.archive.ubuntu.com/ubuntu/ trusty multiverse deb http://gb.archive.ubuntu.com/ubuntu/ Trusty-updates multiverse deb-src http://gb.archive.ubuntu.com/ubuntu/ trusty-updates multiverse deb http://gb.archive.ubuntu.com/ubuntu/ Trusty-backports main restricted universe multiverse deb-src http://gb.archive.ubuntu.com/ubuntu/ Trusty-backports 主限制性宇宙多元宇宙 deb http://security.ubuntu.com/ubuntu trusty-security main restricted deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted deb http://security.ubuntu.com/ubuntu Trusty-security universe deb-src http://security.ubuntu.com/ubuntu trusty-security universe deb http://security.ubuntu.com/ubuntu Trusty-security multiverse deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse deb http://archive.canonical.com/ubuntu 信任的伙伴 deb-src http://archive.canonical.com/ubuntu Trusty partner deb http://extras.ubuntu.com/ubuntu 信任的主体 deb-src http://extras.ubuntu.com/ubuntu trusty main deb http://ppa.launchpad.net/maarten-baert/simplescreenrecorder/ubuntu Trusty main deb http://ppa.launchpad.net/maarten-baert/simplescreenrecorder/ubuntu Trusty main deb http://ppa.launchpad.net/osmoma/audio-recorder/ubuntu trusty main deb http://ppa.launchpad.net/osmoma/audio-recorder/ubuntu trusty main deb http://ppa.launchpad.net/pipelight/stable/ubuntu Trusty main deb http://ppa.launchpad.net/stebbins/handbrake-snapshots/ubuntu trusty main deb http://ppa.launchpad.net/stebbins/handbrake-snapshots/ubuntu trusty main deb http://ppa.launchpad.net/stefansundin/truecrypt/ubuntu trusty main deb http://ppa.launchpad.net/stefansundin/truecrypt/ubuntu trusty main deb http://ppa.launchpad.net/sunab/kdenlive-release/ubuntu trusty main deb http://ppa.launchpad.net/sunab/kdenlive-release/ubuntu trusty main deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu trusty main deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu trusty main deb http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu trusty main deb http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu trusty main
显然，我没有安装元数据包 linux-generic ...... 一个简单的
sudo apt-get install linux-generic && sudo apt-get install --reinstall nvidia-346
就搞定了!
太神奇了，没想到我竟然设法删除了那个元包......
现在我得到了
ema@scv:~$ uname -a Linux scv 3.13.0-46-generic #75-Ubuntu SMP Tue Feb 10 15:24:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux结果!
首先运行 cat /etc/issue 命令来验证你的Ubuntu是什么版本。我的内核和你的一样，但是我的内核Ubuntu版本是14.04。内核版本和发行版本之间总是有区别的。
http://kernel.ubuntu.com/~kernel-ppa/mainline/ 下载3或4个debs。然后用 dpkg -i packageName 安装它们。重新启动你的系统