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HOWTO: Install and tweak Tiny Core for the Eee 900

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OldAdamUser2:
UPDATE: In Tiny Core 3.5 or above the grub.conf entry should be the following:



--- Quote ---title Tiny Core
        root (0x80,0)
   kernel /tiny/bzImage quiet psmouse.proto=imps xvesa=1024x600x32 tce=sda1 home=sdb1 opt=sdb1 nodhcp
   initrd /tiny/tinycore.gz
title Tiny Core
        root (0x80,0)
   kernel /tiny/bzImage quiet psmouse.proto=imps xvesa=1024x600x32 tce=sda1 home=sdb1 opt=sdb1 nodhcp
   initrd /tiny/tinycore.gz
--- End quote ---

In addition, one needs to modify 915 resolution by doing the following:

- Drop down or boot up in text mode.
- run "sudo 915resolution 50 1024 600 32"
- run xsetup and the 1024x600 mode should now appear

andrewb:
With cpufrequtils the module suggested doesn't appear to work for the eeepc 900AX. For this model the acpi-cpufreq module needs to be loaded.

Process to get cpu frequency control on eeepc900ax is:

Add cpufrequtils.tcz to the OnBoot list of extensions

In bootlocal.sh put the lines:


--- Code: ---modprobe acpi-cpufreq
modprobe cpufreq-conservative
cpufreq-set -g conservative
cpufreq-set -g conservative -c1
--- End code ---

Note the need to set the governor for both cores separately.

The p4-clockmod module reports a possible lower minimum frequency (200MHz), but it doesn't allow any governor other than performance to work. acpi-cpufreq report a minimum frequency of 800MHz through cpufreq-info, but does allow the conservative governor to work.

Edit: 29/6/11 - EEEPC 900AX noticeably cooler in use with above settings. CPU frequency can be seen scaling between 800MHz & 1.66 GHz using cpufreq-info in aterm when running other applications, including flash in Firefox. No jitter or delay.

bmarkus:

--- Quote from: andrewb on June 26, 2011, 10:36:18 AM ---
The p4-clockmod module reports a possible lower minimum frequency (200MHz), but it doesn't allow any governor other than performance to work.


--- End quote ---

It is a well known issue with certain type of CPU's. One suggested workaround to set minimum frequency manually with cpufreq-set first before using ondemand or conservative. It doesn't work with my notebook, but who knows.

Use Google to learn more about.

You can try one of the daemons like cpufreqd from the repo, using userspace governor too.

andrewb:
This looks interesting & relevant to the discussion:

http://codemonkey.org.uk/2009/01/18/forthcoming-p4clockmod/

Looks like the p4-clockmod module isn't perhaps the best to use for reducing your power consumption.

ZvyaginzevaE:
which all r the books and e-books that one should follow to prepare for the SCJP pepration
i also need some sites or tutroials which have good number of examples that explains each concepts of the core java

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