OpenBSD Soekris Read Only Root

2010-09-07T18:15:21Z

typos

← Older revision		Revision as of 18:15, 7 September 2010
(3 intermediate revisions not shown)
Line 1:		Line 1:
-	= Running OpenBSD on a [http://www.soekris.com/net4801.htm ~~Soekris~~ net4801] =	+	= Running OpenBSD on a Soekris [http://www.soekris.com/net4801.htm net4801] / [http://www.soekris.com/net5501.htm net5501] =

	== Introduction/Theory ==		== Introduction/Theory ==
Line 6:		Line 6:
	running with the root (only) filesystem mounted read-only. This means the compact-flash card will live a<br/>		running with the root (only) filesystem mounted read-only. This means the compact-flash card will live a<br/>
	little longer, not enduring the write cycles that are fabled to kill them, and if someone trips over the power<br/>		little longer, not enduring the write cycles that are fabled to kill them, and if someone trips over the power<br/>
-	cord, you don't lose anything on the filesystems. You also never need to endure the delay of a ~~length~~ fsck(8).<br/>	+	cord, you don't lose anything on the filesystems. You also never need to endure the delay of a lengthy fsck(8).<br/>
	<br/>		<br/>
	All the bonuses out of the way: it's kind of a bastard to setup.. I'll try my best to detail it, including a<br/>		All the bonuses out of the way: it's kind of a bastard to setup.. I'll try my best to detail it, including a<br/>
-	~~patch(1) file~~ for '/etc/rc'. There are a number of "neat" tricks to play with symbolic links and MFS style<br/>	+	replacement for '/etc/rc'. There are a number of "neat" tricks to play with symbolic links and MFS style<br/>
	RAM-disks.<br/>		RAM-disks.<br/>
	<br/>		<br/>
Line 15:		Line 15:
	== Installation ==		== Installation ==

-	Perform a [[Setting up PXE\|PXE-boot]] standard OpenBSD ~~4.6~~ i386 install, the following differences apply:<br/>	+	Perform a [[Setting up PXE\|PXE-boot]] standard OpenBSD/i386 install, the following differences apply:<br/>
	Power on your soekris with a serial console connected. They use a standard DB9M connector, and supply 19200 baud, 8n1.<br/>		Power on your soekris with a serial console connected. They use a standard DB9M connector, and supply 19200 baud, 8n1.<br/>
	If you don't know what that means, figure it out via google or wikipedia.<br/>		If you don't know what that means, figure it out via google or wikipedia.<br/>
Line 46:		Line 46:
	rdate_flags="-n time.slic.com"		rdate_flags="-n time.slic.com"
	watchdogd_flags="-i 3 -p 10"		watchdogd_flags="-i 3 -p 10"
-	~~pf=YES~~
	ntpd_flags=""		ntpd_flags=""
	named_flags=""		named_flags=""
Line 62:		Line 61:

	# cp /etc/rc /etc/rc-dist		# cp /etc/rc /etc/rc-dist
-	# ftp -o /etc/rc http://wtf.hijacked.us/random/OpenBSD-ro-rc/4.6-rc	+	# ftp -o /etc/rc http://wtf.hijacked.us/random/OpenBSD-ro-rc/4.7-rc
	# cp /dev/MAKEDEV /etc/MAKEDEV		# cp /dev/MAKEDEV /etc/MAKEDEV
	# touch /var/run/ntpd.drift		# touch /var/run/ntpd.drift

Via EPIA

2010-09-01T18:58:18Z

Created page with ' *Motherboard: Via Epia SN18000G *Processor: 1.8GHz VIA C7® Processor *RAM: 2gb *Storage: Compact Flash *Case: VoomPC Automotive Mini-ITX Case *OS: …'

New page

*Motherboard: Via Epia SN18000G
*Processor: 1.8GHz VIA C7® Processor
*RAM: 2gb
*Storage: Compact Flash
*Case: VoomPC Automotive Mini-ITX Case
*OS: Ubuntu 8.04 (with gnome)
*Chipset: VIA CN896 North Bridge
VIA VT8251 South Bridge
*Audio: VIA VT1708A High Defination Audio Codec

==General==
*Jumpers for power switch are second two in from the right on the back row, with the rows of jumpers away from you

*Press F11 during POST to select boot device

*http://www.tkarena.com/forums/archive/index.php/f-20.html VIA EPIA (Mini-ITX, Nano-ITX, Pico-ITX) Arena

*http://www.tkarena.com/forums/via-epia-mini-itx-nano-itx-pico-itx-arena/37123-problems-updating-bios-sn18000.html

*http://www.tkarena.com/forums/via-epia-mini-itx-nano-itx-pico-itx-arena/36269-sn18000g-bios-update.html

*Sound: http://radagast.bglug.ca/epia/epia_howto/x331.html

*BIOS updates at: http://www.via.com.tw/en/products/mainboards/downloads.jsp?motherboard_id=550

==To Do==
===*Set-up:===
* Network user profiles

===*Add:===
*Java
*gedit
===*Fix:===
*Boot on PS/2 mouse and USB keyboard
*Solder power LED on prototype

===*Check on:===
*User/global config files for Ekiga to avoid sound device being set to "Default" on first run

== Ubuntu 8.10 ===
===Custom Stuff===

* FUZZY XORG AFTER INSTALL: set driver to 'vesa' OR compile openchrome 902 (901 is the only provided version). Obtain DRM by compiling from git source.

* BUZZING -> Mute line device for recording.

* Knowplex and Ekiga don't play nice together unless /etc/asound.conf is added so that dmix works

* Sample /etc/asound.conf

pcm.snd_card {
type hw
card 0
}
pcm.dmixer {
type dmix
ipc_key 1024
slave.pcm "snd_card"
slave {
period_size 256
buffer_size 2048
rate 44100
}
}
pcm.dsnooper {
type dsnoop
ipc_key 2048
slave.pcm "snd_card"
slave {
period_size 256
buffer_size 2048
rate 44100
}
}
pcm.duplex {
type asym
playback.pcm "dmixer"
capture.pcm "dsnooper"
}
pcm.!default {
type plug
slave.pcm "duplex"
}
buffer_size 2048
rate 44100
}
}

*install build-essential for most common stuff needed to build

==== Compiling a custom kernel ====

[http://eagle.bsd.st/~andrew/epia-2.6.25.7-kernel-config Here's a kernel config file for 2.6.25-7] - use 'make oldconfig' to make it work with newer kernels.

Compile the new kernel by doing:

make-kpkg -initrd --revision=FSepia001 kernel_image modules_image

The revision can be whatever string you want. Use dpkg -i to install the resulting .deb file. You can also build kernel_headers if you wish (it takes a long time though).

I wanted the ALSA release candidate, so I didn't build alsa support in the kernel. Instead I [http://www.alsa-project.org/main/index.php/Download downloaded] the release candidate tarball, did

./configure --with-cards=hda-intel --with-card-options=hda-codec-via,hda-generic,hda-power-save
make
sudo make install

Note that you should be running the new kernel when you do this. Load the new modules by doing

modprobe snd-hda-intel

The module should load correctly on bootup from now on.

=== Ubuntu Desktop Fails to Start ===

See: [https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/218434 This bug report]

The problem is that gnome-keyring-daemon segfaults on startup (apparently related to flash based storage?).

Solution:

* edit etc/pam.d/gdm as root
* remove all references to gnome_keyring
* save file and restart GDM

=== Power Saving Tips ===

Build a kernel with dynticks enabled and use powertop. Some recommendations from powertop:

Suggestion: increase the VM dirty writeback time from 5.00 to 15 seconds with:
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs

== FreeBSD 7.0 ==
=== Custom Settings ===
==== Ports Settings ====
''/etc/make.conf''
WITHOUT_GNOME="YES"
WITHOUT_KDE="YES"
WITHOUT_PYTHON="YES"

CFLAGS+= -march=i686 -msse3

==== Load kernel modules ====

''/boot/loader.conf''
snd_hda_load="YES"
linux_load="YES"

==== Disable line-In whine on snd_hda module load ====
''/boot/device.hints''
hint.pcm.0.line="0"

http://lists.freebsd.org/pipermail/freebsd-current/2009-January/002031.html
^^ excellent sound tweaking info (2-18-2009)

==== Bootup settings ====
''/etc/rc.conf''
ifconfig_vr0="DHCP"
mixer_enable="YES"

''/var/db/mixer0-state''
vol 85:85 pcm 75:75 line 0:0 mic 0:0 cd 75:75 rec 75:75 =rec mic

==Power Consumption Tuning==
*Consumes 2watts when plugged in and off
*PWM2 fan in BIOS controls cpu fan after boot
*PWM1 fan in BIOS seems to control fan before/during boot
*http://www.heatsink-guide.com/ awesome cooling info
*http://free-electrons.com/community/videos/conferences/ Embedded Linux Conference Videos
*[[Sensors]]

WTFwiki - Recent changes [en]

OpenBSD Soekris Read Only Root

Via EPIA