[TriLUG] Laptop Linux
linux-support at earthlink.net
Fri Dec 12 15:41:31 EST 2003
Found some notes about Linux on Laptops that rang true to my experience.
Under XP I am getting nearly a full day of usage (off and on) on a single
battery charge. On my Presario running Linux with no ACPI control I got 45
mn. With Linux I've read that ACPI control is incomplete and that HD control
is done with a separate program.
Anybody have measurements on how long a battery charge lasts using Linux on a
What I conclude from reading this is that Linux control of ACPI ... well ...
er ... sucks right now. I'll continue to research this, but if anyone has
information to the contrary I'd like to see it.
Excerpts from http://www.freelabs.com/~whitis/linux/xf335/ below:
Notes on Resizing XP partition
There are no free tools to resize an NTFS partion. There are several
commercial programs which can do that. I chose instead to delete the
partition, recreate it as a smaller FAT32 partition, make it primary, format
it, and run the HP reinstall in "Restore C: only" mode. Note that the HP
reinstall will trash any linux partion at hda2 - you need to make windows
partition 2. Of course, the best thing is to delete eXtra Pain entirely.
MM: I was following up a suggestion to use Knoppix and one of the OSS
partition resizers. The information above seems to be correct given what is
written at www.ranish.net/part. Support for NTFS in OSS and shareware is
experimental or embryonic.
Battery life is very poor at the moment, about 1-1/4 hours. This is because
we don't have control over many of the power management features. The screen
backlight is at high intensity all the time; close the lid to conserve power.
ACPI stands for Advanced Configuratin and Power Interface Specification. New
computers do not have a traditional BIOS which allows you to configure the
machine. Instead, the ACPI bios gives the operating system control over the
machine configuration. About all the user has control over is the boot order
and even then we still don't have a decent boot loader in the bios. Another
acronym used is OSPM, or Operating System Power Management; this is code in
the operating system which communicates with the ACPI bios through the ACPI
Driver/AML Interpretter. ASL, which stands for ACPI Source Language, is
compiled into AML, which stands for ACPI Machine Language. DSDT stand for
Differentiaded System Description Table which is basically a table describing
the system configuration.
Linux support of ACPI is pretty sketchy at the moment.
ACPI support under windoze is pretty sketchy too. Basic stuff like battery
monitoring works but if you want to configure your EPP/ECP parallel port into
EPP mode instead of ECP, you are out of luck.
Make clockwise circles with your right foot.
Now use your right hand to draw the number "6" in the air.
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