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Installed Ubuntu 9.04 Desktop on my laptop. &nbsp;Worked great. &nbsp;Installed with AC adapter powering the laptop. &nbsp;Would boot in less than 20 seconds, no hang ups, no errors. <br />
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Later tried booting with AC power unplugged (fully charged battery). &nbsp;This time boot time was over one minute, with several apparent hangs while booting -- had to push space bar to move boot along.<br />
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Yet if I put the laptop on AC power, immediately boot up and power down is super fast. &nbsp;<br />
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What settings do I need to change so that i get a fast boot on battery as on ac power.
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Installed Ubuntu 9.04 Desktop on my laptop.  Worked great.  Installed with AC adapter powering the laptop.  Would boot in less than 20 seconds, no hang ups, no errors. 

Later tried booting with AC power unplugged (fully charged battery).  This time boot time was over one minute, with several apparent hangs while booting -- had to push space bar to move boot along.

Yet if I put the laptop on AC power, immediately boot up and power down is super fast.  

What settings do I need to change so that i get a fast boot on battery as on ac power.

Ubuntu Jaunty 9.04 Desktop - fast boot on laptop with AC power- very slow boot if on battery power

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).