bashroom

OpenWrt package (atheros) of MJPG-streamer including web demo

HKairpost — Sat, 08 May 2010 12:43:11 +0000

Backfire packaged version of the MJPG-streamer do not include the web demo: https://dev.openwrt.org/ticket/6499
Here is a packaged built for atheros that include the patch submitted to the ticket: http://hk.airpost.net/openwrt/mjpg-streamer_r94-1_6499diff_atheros.ipk

To install it:

cd /tmp
wget http://hk.airpost.net/openwrt/mjpg-streamer_r94-1_6499diff_atheros.ipk opkg update
opkg install mjp-streamer

Opkg will fetch the dependencies from the regular OpenWrt repository. See my previous post get what is needed to stream with your webcam on OpenWrt.

Webcam streaming with openwrt backfire

HKairpost — Tue, 04 May 2010 16:51:15 +0000

Unlike OpenWrt kamikaze 8.09.2, newest release backfire 10.03 needs the following packages to get a UVC webcam to stream on the web:

# opkg install kmod-usb2 kmod-video-uvc kmod-i2c-core kmod-input-core mjpg-streamer

Start the demon with:

# /etc/init.d/mjpg-streamer start

Stream will be available at: http://ipaddress:8080/?action=stream

Note that an hotplug script was created in /etc/hotplug.d/usb and that the mjpg_streamer will start as soon as the webcam is connected.

Config is in: /etc/config/mjpg-streamer

Keep Resolution upon reboot when using NVIDIA binary driver

HKairpost — Mon, 03 May 2010 17:02:07 +0000

Recent versions of gnome – at least the one shipped with Ubuntu 9.10 and 10.04 – use resolution settings specific for each user. The resolution is set in /home/username/.config/monitors.xml which is loaded upon login.

The tool provided along with NVIDIA driver changes your resolution in /etc/X11/xorg.conf but not in monitors.xml as gnome’s “Monitors” tool does. As a consequence you need to edit /home/username/.config/monitors.xml manually:


 
 no
 
 ???
 0x0000
 0x00000000
 1920
 1080
 0
 0
 0
 normal
 no
 no
 no

Mediawiki: Only registered users with email confirmed can edit

HKairpost — Sat, 05 Dec 2009 13:29:47 +0000

This use case implies that visitors can only see content of the wiki when registered users with confirmed email address can participate in creating content. It also creates a moderator group called ninja with extended rights that you can

Based on mediawiki 1.15.1 default $wgGroupPermissions array. You need to add the following to your LocalSettings.php:

// Get user in emailconfirmed group when loading email confirmation link

$wgAutopromote = array(

    ‘emailconfirmed’ => APCOND_EMAILCONFIRMED,

);

$wgGroupPermissions = array();

// Group for all visitors

$wgGroupPermissions[‘*’][‘createaccount’]    = true;

$wgGroupPermissions[‘*’][‘read’]             = true;

$wgGroupPermissions[‘*’][‘edit’]             = false;

$wgGroupPermissions[‘*’][‘createpage’]       = false;

$wgGroupPermissions[‘*’][‘createtalk’]       = false;

$wgGroupPermissions[‘*’][‘writeapi’]         = false;

// Group for all logged-in accounts

$wgGroupPermissions[‘user’][‘move’]             = false;

$wgGroupPermissions[‘user’][‘move-subpages’]    = false;

$wgGroupPermissions[‘user’][‘move-rootuserpages’] = false; // can move root userpages

$wgGroupPermissions[‘user’][‘movefile’]         = false;  // Disabled for now due to possible bugs and security concerns

$wgGroupPermissions[‘user’][‘read’]             = true;

$wgGroupPermissions[‘user’][‘edit’]             = false;

$wgGroupPermissions[‘user’][‘createpage’]       = false;

$wgGroupPermissions[‘user’][‘createtalk’]       = false;

$wgGroupPermissions[‘user’][‘writeapi’]         = false;

$wgGroupPermissions[‘user’][‘upload’]           = false;

$wgGroupPermissions[‘user’][‘reupload’]         = false;

$wgGroupPermissions[‘user’][‘reupload-shared’]  = false;

$wgGroupPermissions[‘user’][‘minoredit’]        = false;

$wgGroupPermissions[‘user’][‘purge’]            = true; // can use ?action=purge without clicking "ok"

// Implicit group for accounts that pass $wgAutoConfirmAge

$wgGroupPermissions[‘autoconfirmed’][‘autoconfirmed’] = true;

// Group for accounts with confirmed email addresses

// Users have to register and confirm email to edit

$wgGroupPermissions[‘emailconfirmed’][‘move’]             = true;

$wgGroupPermissions[‘emailconfirmed’][‘move-subpages’]    = true;

$wgGroupPermissions[‘emailconfirmed’][‘move-rootuserpages’] = true; // can move root emailconfirmedpages

$wgGroupPermissions[‘emailconfirmed’][‘movefile’]  = false; // Disabled for now due to possible bugs and security concerns

$wgGroupPermissions[‘emailconfirmed’][‘read’]             = true;

$wgGroupPermissions[‘emailconfirmed’][‘edit’]             = true;

$wgGroupPermissions[‘emailconfirmed’][‘createpage’]       = true;

$wgGroupPermissions[‘emailconfirmed’][‘createtalk’]       = true;

$wgGroupPermissions[‘emailconfirmed’][‘writeapi’]         = false;

$wgGroupPermissions[‘emailconfirmed’][‘upload’]           = true;

$wgGroupPermissions[‘emailconfirmed’][‘reupload’]         = true;

$wgGroupPermissions[‘emailconfirmed’][‘reupload-shared’]  = true;

$wgGroupPermissions[‘emailconfirmed’][‘minoredit’]        = true;

$wgGroupPermissions[‘emailconfirmed’][‘purge’]            = true; // can use ?action=purge without clicking "ok"

// Group for moderator accounts

$wgGroupPermissions[‘ninja’][‘ninja’]       = true;

$wgGroupPermissions[‘ninja’][‘block’]       = true;

$wgGroupPermissions[‘ninja’][‘delete’]      = true;

$wgGroupPermissions[‘ninja’][‘editprotected’]   = true; // can edit all protected pages without cascade protection enabled

// Users with bot privilege can have their edits hidden

// from various log pages by default

$wgGroupPermissions[‘bot’][‘bot’]              = true;

$wgGroupPermissions[‘bot’][‘autoconfirmed’]    = true;

$wgGroupPermissions[‘bot’][‘nominornewtalk’]   = true;

$wgGroupPermissions[‘bot’][‘autopatrol’]       = true;

$wgGroupPermissions[‘bot’][‘suppressredirect’] = true;

$wgGroupPermissions[‘bot’][‘apihighlimits’]    = true;

$wgGroupPermissions[‘bot’][‘writeapi’]         = true;

$wgGroupPermissions[‘bot’][‘editprotected’]    = true; // can edit all protected pages without cascade protection enabled

// Most extra permission abilities go to this group

$wgGroupPermissions[‘sysop’][‘block’]            = true;

$wgGroupPermissions[‘sysop’][‘createaccount’]    = true;

$wgGroupPermissions[‘sysop’][‘delete’]           = true;

$wgGroupPermissions[‘sysop’][‘bigdelete’]        = true; // can be separately configured for pages with > $wgDeleteRevisionsLimit revs

$wgGroupPermissions[‘sysop’][‘deletedhistory’]   = true; // can view deleted history entries, but not see or restore the text

$wgGroupPermissions[‘sysop’][‘undelete’]         = true;

$wgGroupPermissions[‘sysop’][‘editinterface’]    = true;

$wgGroupPermissions[‘sysop’][‘editusercssjs’]    = true;

$wgGroupPermissions[‘sysop’][‘import’]           = true;

$wgGroupPermissions[‘sysop’][‘importupload’]     = true;

$wgGroupPermissions[‘sysop’][‘move’]             = true;

$wgGroupPermissions[‘sysop’][‘move-subpages’]    = true;

$wgGroupPermissions[‘sysop’][‘move-rootuserpages’] = true;

$wgGroupPermissions[‘sysop’][‘patrol’]           = true;

$wgGroupPermissions[‘sysop’][‘autopatrol’]       = true;

$wgGroupPermissions[‘sysop’][‘protect’]          = true;

$wgGroupPermissions[‘sysop’][‘proxyunbannable’]  = true;

$wgGroupPermissions[‘sysop’][‘rollback’]         = true;

$wgGroupPermissions[‘sysop’][‘trackback’]        = true;

$wgGroupPermissions[‘sysop’][‘upload’]           = true;

$wgGroupPermissions[‘sysop’][‘reupload’]         = true;

$wgGroupPermissions[‘sysop’][‘reupload-shared’]  = true;

$wgGroupPermissions[‘sysop’][‘unwatchedpages’]   = true;

$wgGroupPermissions[‘sysop’][‘autoconfirmed’]    = true;

$wgGroupPermissions[‘sysop’][‘upload_by_url’]    = true;

$wgGroupPermissions[‘sysop’][‘ipblock-exempt’]   = true;

$wgGroupPermissions[‘sysop’][‘blockemail’]       = true;

$wgGroupPermissions[‘sysop’][‘markbotedits’]     = true;

$wgGroupPermissions[‘sysop’][‘apihighlimits’]    = true;

$wgGroupPermissions[‘sysop’][‘browsearchive’]    = true;

$wgGroupPermissions[‘sysop’][‘noratelimit’]      = true;

$wgGroupPermissions[‘sysop’][‘movefile’]         = true;

#$wgGroupPermissions['sysop']['mergehistory']     = true;

// Permission to change users’ group assignments

$wgGroupPermissions[‘bureaucrat’][‘userrights’]  = true;

$wgGroupPermissions[‘bureaucrat’][‘noratelimit’] = true;

debif v01: debian for the bifferboard

HKairpost — Sun, 18 Oct 2009 23:30:34 +0000

Here is debif v01 a debian lenny rootfs and a kernel image compiled for the bifferboard. It is an early stage beta, please report problems and suggestions to bifferboard’s mailing list.

rootfs: rootfs_debif01h.tar.lzma 123MB
kernel package: linux-image-2.6.30-8-debif 1.9MB
kernel headers package: linux-headers-2.6.30-8-debif 5.4MB

Instructions:

Find kernel binary in /boot of the rootfs or in kenel package and upload it to the bifferboard.
Format a USB drive in ext3 and untar the rootfs to the drive.
Boot the bifferboard conected to your home network. It will get DHCP lease from your router.
ssh root@ipofthebifferboard (password is ‘password’)

Then you have fully functional debian box. Included additional packages are mainly ntpdate and ssh (server and client), but you can install what ever you need from debian repositories using apt-get!

Get NowPlaying Screelets to work with Rhythmbox

HKairpost — Sun, 21 Jun 2009 11:00:51 +0000

The version of NowPlaying in the package of Screenlets from Ubuntu jaunty 9.04: 0.1.2-ubuntu2 doesn’t work with Rhythmbox.

Julien Lavergne provided a fix which isn’t yet available in the Ubuntu main repository but you can download a fixed version of the package from his PPA: 0.1.2-6~ppa6. Checkout this doc from launchpad to add a PPA and its key to your Ubuntu repositories.

BTW: NowPlayingScreenlet theme pack ship some really nice skins – Vinyl especially – to be untar in: /usr/share/screenlets/NowPlaying/themes

Get your Screenlets to display on all desktops

HKairpost — Sun, 21 Jun 2009 10:58:25 +0000

In Ubuntu jaunty 9.04 that’s not the default behaviour. So install all the wanted widgets then right click on them and in Window select the following:

Sticky
Widget
Keep below

If as soon as you select the Widget settings the widget disappear it means that the Widget layer plugin is activated in your compiz fusion options. Inactivate this option in CompizConfig Settings Manager.

The goal of the widget layer is to have the widgets displayed on top of all your windows when pressing a special key – F9 is the default key.

Get sound playing and recording to work in Skype

HKairpost — Sun, 21 Jun 2009 10:56:35 +0000

I installed Skype in Ubuntu jaunty 9.04 from medibuntu repository, which have a packaged version available. With default settings no sound could be played nor recorded.

Work around:

in skype’s options -> Sound Devices set the following:

Sound In: hw0
Sound out: pulse
Ringing: pulse

Correct $HOME/.dmrc permissions

HKairpost — Sun, 21 Jun 2009 10:50:50 +0000

Something modified the permissions of my $HOME/.dmrc file. Consequently an annoying error display at login:

User’s $HOME/.dmrc file is being ignored. This prevents the default language and session from being saved. File should be owned by user and have 644 permissions. User $HOME directory must be owned by user and not writeable by other users.

to fix the permissions:

$ sudo chown -R $USERNAME: $HOME $ chmod 755 $HOME $ chmod 644 $HOME/.dmrc

Alternative way to handle hard drives & partitions in Ubuntu

HKairpost — Sun, 21 Jun 2009 10:43:18 +0000

Just got Ubuntu Jaunty 9.04 installed. I like the following behaviour to be applied to my hard drive partitions and mass storage devices – pen drives, USB disks:

Automount all partitions of internal hard disk – without using fstab:

In /etc/hal/fdi/policy/preferences.fdi

false

false -> true

No hard drive icons displayed on desktop:

In gconf-editor – Alt+F2 to launch it, go to:

apps -> nautilus -> desktop

uncheck volumes_visible