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realtime 内核（下面简称 rt）其实就是 Ubuntu Studio 默认使用的内核，这个内核经过优化，可以加快打开程序的速度，开启 compiz 后看视频会花屏的现象得到改善。我使用后的第一感觉是，响应速度明显加快了，尤其是打开 nautilus 的速度。缺点就是不适合用于笔记本电脑，会增加用电量的，而且也不适用于服务器版本。

suxixb@su:~$ uname -srvm
Linux 2.6.22-14-rt #1 SMP PREEMPT RT Tue Feb 12 09:57:10 UTC 2008 i686

安装 rt 内核

sudo apt-get install linux-backports-modules-rt linux-headers-2.6.22-14-rt linux-headers-rt linux-image-2.6.22-14-rt linux-image-rt linux-restricted-modules-rt linux-rt

安装完成后，重启，在 GRUB 处会叫您选择启动 rt 内核还是 generic 内核，选择 rt 项。

另外，Ubuntu 源内已经有不少编译好的内核了，其实完全可以挑一个自己喜欢的使用，平时用的 generic 内核属于通用内核。

suxixb@su:~$ apt-cache search linux-image
alsa-base - ALSA driver configuration files
linux-image - Generic Linux kernel image.
linux-image-386 - Linux kernel image on 386.
linux-image-debug-386 - Linux kernel debug image for 386 kernel image
linux-image-debug-generic - Linux kernel debug image for generic kernel image
linux-image-debug-server - Linux kernel debug image for server kernel image
linux-image-generic - Generic Linux kernel image
linux-image-server - Linux kernel image on Server Equipment.
linux-image-virtual - Linux kernel image geared towards virtualised hardware
linux-image-debug-ume - Linux kernel debug image for ume kernel image
linux-image-rt - Linux kernel image on realtime kernel
linux-image-ume - Linux kernel image on 386 Embedded/Mobile
linux-image-xen - Linux kernel image on Xen
rt2400-source - source for rt2400 wireless network driver
rt2500-source - source for rt2500 wireless network driver
virtualbox-ose-modules-2.6.22-14-generic - virtualbox-ose modules for linux-image-2.6.22-14-generic
virtualbox-ose-modules-2.6.22-14-server - virtualbox-ose modules for linux-image-2.6.22-14-server
xen-image-2.6.19-4-generic - Linux 2.6.19 image on PPro/Celeron/PII/PIII/P4
xen-image-2.6.19-4-server - Linux xen 2.6.19 image on x86.
linux-image-2.6.22-14-386 - Linux kernel image for version 2.6.22 on i386
linux-image-2.6.22-14-generic - Linux kernel image for version 2.6.22 on x86/x86_64
linux-image-2.6.22-14-server - Linux kernel image for version 2.6.22 on x86/x86_64
linux-image-2.6.22-14-virtual - Linux kernel image for version 2.6.22 on x86
linux-image-debug-2.6.22-14-386 - Linux kernel debug image for version 2.6.22 on i386
linux-image-debug-2.6.22-14-generic - Linux kernel debug image for version 2.6.22 on x86/x86_64
linux-image-debug-2.6.22-14-server - Linux kernel debug image for version 2.6.22 on x86/x86_64
linux-image-debug-2.6.22-14-virtual - Linux kernel debug image for version 2.6.22 on x86
linux-image-2.6.22-14-rt - Linux kernel image for version 2.6.22 on RT kernel
linux-image-2.6.22-14-ume - Linux kernel image for version 2.6.22 on Ubuntu Moblie and Embedded
linux-image-2.6.22-14-xen - Linux kernel image for version 2.6.22 on This kernel can be used for Xen dom0 and domU

Configure kernel