# unity

Screenshots of the new Unity desktop. There’s certainly a harsh non – exclusive competing between Unity and GNOME Shell. A proxy war between Ubuntu and Fedora Core, which is in turn a proxy war between Canonical and Red Hat.

Eventually, it’s user experiences that would decide which desktop is best (and best for what), and that’s still a long way to come. But technically, Unity is the first huge bold break from tradition, whose real goal deep inside is replacing completely the age – old heritage of X window system by an OpenGL – based one, a problem partially addressed in my previous post.

am trying Ubuntu’s new desktop introduced lately with Natty Narwhal (11.04). After heavy development phases, Unity has reached its alpha stage, a massive move replacing the GNOME desktop environment by a completely new one written from scratch. I’ve read too many negative reviews about Unity already, but personally I think this is a good move. Developed from Ubuntu’s Netbook Remix (which I didn’t like much, you don’t have to maximize windows like that all the time), switched from Clutter to Compiz 3D windows compositing system (my last experiment with Clutter also hinted potential performance problems), the new Unity shows a huge shift toward Mac’s style desktop. Though there’s still lots of bugs and missing features, a few things can be said about this new Unity.

First, people complains about the break from the norms, some hates Unity because it stops their accustomed habits. The GNOME community (with its long development history) can feel like being betrayed. But for all I knew after some years in graphics, UI design is the job of personality, it’s the task of a small group who decides what is “nice and beautiful”, and which is the way (for other users) to follow, it’s not the task of a committee (that is “People’s Committee” I mean 😬). As a developer, I’m often in the self – conflicting state of wondering what is “nice and beautiful”, modify over and over again some simple UI widgets. It’s no strange that UI always becomes a huge diversity (and problems) for community – driven projects. Key requirements for a UI system in my opinion are: simplicity, consistency and elegance.

For consistency and simplicity, Unity is a big step forward, reasons given that GNOME has become too complex and inconsistent (then how about the much more complex KDE?). Maximized windows have the caption and menu bars all incorporated into the system bar on top, a feature clearly borrowed from Mac, yet further varied and developed. A simple dock bar is positioned on the left, and system menu button doesn’t bring up menu but a searching panel with which you can launch programs, open files… with a few key strokes. I like this much cause it offers a form of GNOME – Do: it’s harder to launch rarely – used items (especially if you don’t remember the names) but it’s more convenient for frequently – used ones. After all, lexical memory is much faster than spatial memory, if one has been trained to that.

One more apparent physical factor is that the vertical screen space is more scarce compared to horizontal space, and 16:9 screens has become quite popular. To conserve useful screen space, UI must make constraints to the caption, menu bars, especially tool bars, there’s even recommendations on eliminating the status bar and minimizing scroll bar at Mark Shuttleworth’s (Canonical’s founder) blog. For scroll bar, that’s quite sure a mimic and modified version taken from iOS. Actually with my recent experiences with Mac and iOS, there’s still a lot of lessons to be learned from these two OSes on how to use space efficiently: remove heavy windows decorations and borders, use lighter UI fonts, smaller and more symbolic icons, design simpler widgets… and in cases even sacrifice some less – used UI features.

The trend of UI becoming simpler and more consistent is quite obvious. Efficient uses of space is the key, but spatial is not all for user experiences: keyboard and mnemonic are also important parts of the learning path (UI effects can be fancy, but over time, people get to love the simplest keystrokes that do the job). The third factor: elegance is even more a topic of debate, people can largely agree to what is simplicity and consistency, but what is aesthetics remains mysterious! Unity claims that it would directly compete Mac on UI designs and user experiences, but my opinion is that its aesthetic aspect is still far behind that of Mac, e.g: Compiz’s effects are numerous, but actually not very fine – tuned compared to the smaller set of animations Mac offers… And even Mac still doesn’t satisfy my eyes in quite many cases…

# jingle hell

First, it’s Jabber, then the open standard XMPP, then libjingle (the thing behind GTalk and several other VoIP applications). An essential part of VoIP, VPN, P2P technologies is ICE (Interactive Connectivity Establishment), techniques that help computers behind routers connect to each other…

ow it’s Christmas time, but this has nothing to do with Xmas except the name: LIBJINGLE. For a long time, I’ve been trying to expose one of my home servers to the Internet. Normally, you’d just need to setup dynamic DNS to update the router IP address and NAT (Network Address Translation) to forward one port onto the server. Unfortunately, my ADSL router is a special (hardware / firmware) version OEM-ed by Comtrend to FPT (the local ISP), and no matter how I configure, NAT is simply forbidden. I’ve tried various techniques to punch holes (TCP, UDP) through NAT, such as this pwnat, a trick to fool the router using ICMP echo packet. However, due to different router implementation & configuration, no technique is known to work in 100% of the cases, as pointed out in this paper.

The NAT traversal problem repeats itself in various applications: VoIP, P2P network, VPN (Virtual Private Network), networking for games… Current technologies take a dual approach in solving this: a certain kind of ICE (Interactive Connectivity Establishment) when two peers can directly connect to each other, or a central server in between in case the routers forbid it all. Such as with libjingle, Google Talk servers are used in case a direct connection can not be made. Remember the Skype’s global disconnect problem lately? It’s the same sort of problem with ‘central servers’. With these knowledge in hands, it’s turned out that setting up a VPN to access my home servers from anywhere is quite easy as follow.

Build libjingle and fwd (a simple wrapper around libjingle). Building libjingle on Debian is a nightmare (yes, it’s a real nightmare, libjingle 0.4 has a nasty code base). It took me a whole day, and after changing several dozens of places in libjingle’s code, I got it compiled and run correctly (please refer to this post for some initial building instructions). Once the transportation channel has been established with libjingle, a SSH tunnel is setup to forward a port on your roaming laptop to the SSHD port (22) on the home server:

# on a server inside your home network, this will forward
# port 2222 to port 22 of another machine (‘buffalo’)
./fwd -u account@gmail.com -p password 2222:buffalo:22

# on your laptop from anywhere on the Internet, almost
# the same command, but the -L option for client mode
./fwd -u account@gmail.com -p password -L 2222:buffalo:22

# then connecting to the ‘buffalo’ box is just setting up
# a SSH session, thus a SSH tunnel inside another SSH tunnel
ssh root@localhost -p 2222

The technique works flawlessly, I can now access my home VPN from anywhere. Basically you’re inside a VPN now, so various setups at home would transparently work (strictly speaking, this is still not real VPN as TCP, UDP broadcasting may not work, but most regular connections would). Next, I proceed to exposing some of my home services onto the outside world. Again SSH proves to be such a very very powerful tool as you can build SSH tunnel inside another tunnel, which can be nested for several layers (ssh is actually means ssshhh! – sign used to signal lowering one’s voice I think):

### File sharing

SFTP (Secured File Transfer Protocol) is built on top of SSH, and SFTP is native to any Linux (for Windows, we could use WinSCP, and for Mac is Cyberduck). Just connect to one end of the tunnel like with SSH (localhost:2222) and on the other end of the (nested) tunnels, we get access to the whole file system.

### Subversion

SSH is built-in into SVN (I often use SVN by command line rather than WebDAV). Something like: svn co svn+ssh2222://user@localhost/svn/project would do the job, where ssh2222 is defined in your subversion’s configuration file (under the [tunnels] section) as: ssh -p 2222, this instructs the secured shell to connect to the host, then call the ad-hoc svnserve instead of a real web server.

### Web Proxy

This is very useful since if helps surfing the Internet securely while you’re in public. After setting up Squid web proxy on the same server, the command: ssh -N -L 8080:localhost:8888 root@localhost -p 2222 tells SSH to forward the local port 8080 to the proxy port 8888, then pointing Firefox at localhost:8080 would secure our traffic more than enough (2 levels of nested tunnels and 2 levels of port-forwarding).

### Music streaming

I use this to casually enjoy my music collections while not at home. Install FireFly (formerly mt-daapd) music streaming server and forward the default port 3689, then I can listen my favorites songs anywhere using Rhythmbox (Linux). And since the protocol (daap) is originated from Apple, listening is also natively available on any Mac machines using iTunes.

# home servers

The C-Media usb board adds a cheap (~ $5) sound solution to the Debian box, sound quality is fair enough for “ad-hoc” listening (comparable to that of AC97 on-board chip, and for serious music, there’s already the home media player). uite a long time it takes me to finish and “stabilize” all these “home servers”… and finally here it is… On the left, you can see: #1: the 650 Watt UPS that provides about 3 hours of un – interrupted electricity for the whole system, #2: the WAP54G Access Point (hacked with OpenWRT), #3: the Comtrend ADSL router, #4: the LinkStation CHL (Debian Lenny: print server, 1T disk space for samba share, bittorrent server), #5: the LinkStation Duo (Debian Lenny: 1T of RAID-1 disk space for important data, SVN, Web, VPN servers (for remote access) and MPD music servers), #6: speakers. All these miniature machines help streaming lossless music and HD video to the media player (LT-H90LAN – another Linux box resides in the living room). Except for the router (which is specialized hardware & firmware OEM-ed by Comtrend to FPT – the local ISP), all others devices runs Debian or another Linux variant. The total power consumption of the whole system is less than 50 Watt. Future computers would consume less than 1/10th of power compared to today’s ones… Power is the key, less power means less heat, less noise, more stable and more durable… the factors that make successful home services! # buffalo duo My Buffalo, a 400 MHz, power-efficient ARM system (it consumes about 17W on average). The duo: two SATA disks (1TB each) running in RAID-1 configuration. The system can also act as a print server: most cheap home laser printer are not stand-alone device (lacking PostScript capability) and need to be attached to a PC in order to print, instead we can connect printer to this Buffalo box via usb and serve printing over network. y newest toy: a Buffalo LinkStation Duo Network Attached Storage (NAS – or a poor man’s home server). Had thought about this long ago but don’t have time till now to dig a little bit low-level to get the thing to work! Basically what I want to have is a miniature general-purpose home server, which would run continuously 24/7. But you know with the temperature and electricity conditions here in HCMC, most PC would surely break down if let running continuously for a few months. The idea is to hack this NAS device to run Debian and turn it into a hybrid system: NAS (file server, torrent, UPnP…) and a home server which would handle a little more extra tasks. I took me a whole night to figure out how to do it. 1. Boot the device via tftp, using u-boot, the universal bootloader. We need to to erase the HDD’s partition table (with something like: dd if=/dev/zero of=/dev/sd[a/b] count=1) to force the device into tftp boot. 2. Telnet to the device and prepare the disks: using fdisk to apply a same partition structure to both two disks (/dev/sda and /dev/sdb) with the usual Linux FS: /boot, /swap, /(root), and /data). The disk structure would appear like this: Device Boot Start End Blocks Id System /dev/sda1 1 6 48163 fd Linux raid /dev/sda2 7 1200 9590805 fd Linux raid /dev/sda4 1201 60801 478745032 85 Linux extended /dev/sda5 1201 1329 1036161 82 Linux swap /dev/sda6 1330 60801 477708808 fd Linux raid 3. Setup the RAID-1 (one-to-one mirror) structure, you can see that we mirror /boot (sda1, sdb1), /(root) (sda2, sdb2), and /data (sda6, sdb6), there’s no need to mirror /swap: mdadm –create /dev/md0 –level=1 –raid-devices=2 /dev/sda1 /dev/sdb1 mdadm –create /dev/md1 –level=1 –raid-devices=2 /dev/sda2 /dev/sdb2 mdadm –create /dev/md2 –level=1 –raid-devices=2 /dev/sda6 /dev/sdb6 4. Install Debian (Lenny) using debootstrap, a very handy tool to install Debian directly from a repository. DeBootStrap pulls the packages over network, build a new rootfs, after chroot-ing to the newly build system, pull and build the kernel from source. After that, we can use regular Debian commands to update, configure network, add softwares, etc… After rebooting, we’d got a brand new Debian with 1TB of RAID-1 disk space, which runs flawlessly and which is ready to serve my various automation tasks! Notes: installing Debian would void the warranty and could easily brick your device, use the information at your own risk. The steps here are just summary, there’s been various try and fail to get the thing done, e.g: we need priorly to have binutils, wget, zlib and libssl binaries for debootstrap to work (download the deb files from Lenny’s repository, extract and copy over the Buffalo), after debootstrap-ing, I forgot to set the root password, and unable to login when the machine reboot, thus having to start the whole process over again 😢. For further details, please consult the Buffalo NAS community. ### UPDATE, Nov 18th, 2010 For a NAS which runs 24/7, it’s critical to monitor system status (temperature and the moving parts). I wrote this little fand script, a daemon to monitor hard disk temperature and adjust the fan’s speed accordingly. HDD’s temperature can be retrieved using smartmontools (most hard disk nowadays has S.M.A.R.T capabilities). And fan control on Buffalo LS Duo is done via the gpio module (thanks to talent hackers on the Buffalo NAS forum), something like this: # values can be ‘off’, ‘slow’, ‘fast’ and ‘full’$ echo ‘slow’> /proc/linkstation/gpio/fan

I’ve defined some thresholds, in a tropical country like VN, room temperature around 30° ~ 35° (Celsius) is a common thing, so if the HDD’s temperature is below 35°, we would turn off the fan. If it is between 35° ~ 40°, the fan speed would be ‘slow’, from 40° to 45°, the fan will be turned to ‘fast’, and if temperature excesses 45°, fan speed is set to ‘full’. Well, and even if 50° is reached, we would send a notification email (via sendmail) and shutdown the system. If you find it interesting, here is the fand scripts.

### UPDATE, Nov 20th, 2010 (THE REAL DUO)

To pair with the Link-Station NAS is its cousin also from Buffalo, the Link-Theater LT-H90LAN. The LT-H90LAN reads media from Samba shares or DLNA server via LAN and is a 720p and 1080i HD-ready device. Although not Full-HD (1080p), that’s enough for my need (I don’t have a Full-HD TV in my house anyhow, maybe I’m waiting for 3D home video). It’s quite pleasing to enjoy good video quality and excellent audio in your living room, all streaming from a central NAS. The box also runs a variant of Linux (though hacking can be a pain, I would only left the device untouched for safe). This is one further step toward an all-Linux-devices home (thought I should buy an OpenMoko phone then).

# chinese rendering server

n my previous post, we can see the image – replacement technique being applied to mathematical formulas rendering. Replacing text by image can be seen in various Web’s techniques, mainly to display things that browser can’t! It’s a possibility that many Web technologies would never converge into common “form factors”: how many years have passed but SVG is still not supported on all browsers, how font technologies are still fighting stiffly with each other? Various issues would always remain unresolved and image replacement, though ugly and inconvenient, could be used as a temporary solution.

As you can see in the image above: the first line is a popular Chinese straight – stroke font that can be seen on most browsers, the next lines are nice calligraphy (brush – stroke) fonts that can hardly be seen on the web! I’m going to try using FreeType2 for a very specific problem: rendering Chinese fonts, the only reason is just simple: aesthetics! Searching around, I can’t find any simple, standalone solution: nice Chinese fonts are very big, a typical ttf file has size from 5MB to 50MB depending on the character set and quality (with that size, it’s obvious that we should use a server side solution). Packages like Pango or Cairo are too complex, and would require additional dependencies (which is unavailable on a free Linux host).

FreeType2 is an very handy open source library, it’s available on many flatform: Unix, Dos, Windows, Mac, Amiga, BeOS, Symbian… and it does a very good job of handling typefaces! Since FreeType2’s patent issues have expired since May, 2010, we would see an increasing application of FreeType2 in many areas.

It takes me a whole day struggling with FreeType2’s reference and manual to get it work with Chinese fonts (quite different from conventional Latin fonts indeed), and finally here it is! You can access the executable at: http://tkxuyen.com/freetype2.php with the following syntax: freetype2.php ? text=… &font=… &size=… &color=… here is an example. Below are renderings with different sizes (anti – alias works really well):

text=洛阳城东桃李花飞来飞去落谁家&font=2&size=11&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=12&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=13&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=14&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=15&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=16&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=18&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=18&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=19&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=20&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=21&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=22&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=23&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=24&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=25&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=26&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=27&color=333333
text=洛阳城东桃李花飞来飞去落谁家&font=2&size=28&color=333333

and renderings with 3 different Chinese fonts (very big files, installed on server) and in different colors. Just note these fonts are a bit non-standard: they produce traditional Chinese characters as output, but only accept simplified Chinese as input:

text=洛阳城东桃李花飞来飞去落谁家&font=2&size=28&color=AA2222
text=洛阳城东桃李花飞来飞去落谁家&font=1&size=28&color=22AA22
text=洛阳城东桃李花飞来飞去落谁家&font=0&size=28&color=2222AA

This is my very simple C code (~250 LOC) to experiment with FreeType2: loading font, loading glyph, rendering bitmap, dealing with Unicode… To compile, just something like: gcc gifsave.c freetype2.c -o freetype2.cgi pkg-config --cflags --libs freetype2. I hope I can have time to extend the code into a more usable form: multi – line layout, alignment, RTF support, etc… Some restrictions are imposed to protect the server, if some text can’t be rendered (e.g: rendering dimensions are too large), an error image like this is displayed instead:

# latex rendering server

\red\large e^x=\sum_{n=0}^\infty\frac{x^n}{n!}

\blue\normal\left {\begin{x+\frac{3x-y}{x^2+y^2}=3}\\{y-\frac{x+3y}{x^2+y^2}=0}

\normal f^\prime(x)\ = \lim_{\Delta x\to0}\frac{f(x+\Delta x)-f(x)}{\Delta x}

R=\normal \frac{\displaystyle{\sum_{i=1}^n (x_i-\bar{x})(y_i- \bar{y})}}{\displaystyle{\left[ \sum_{i=1}^n(x_i-\bar{x})^2 \right]^{1/2}}}

\large \sum_{i=1}^{n}\frac{aibi}{ai+bi} \leq \frac{(\sum_{i=1}^{n}ai)(\sum_{i=1}^{n}bi)}{\sum_{i=1}^{n}ai+\sum_{i=1}^{n}bi}

Some example expressions rendered by MimeTeX (it’s good to appear to be smarter than you are 😬!) If an expression fails to be rendered, you would see an error image like this:

ecently, the wonderful yourequations.com site (which I’ve been using to occasionally render mathematical expressions on web pages) has ceased it’s service due to heavy traffic. I was thinking about running my own LaTeX rendering server, things turned out to be pretty easy as follow, thanks to the excellent MimeTeX package, a LaTeX reduced subset. It’s also interesting to experiment the “stone age technique” of CGI, first download and compile the package:

wget http://www.forkosh.com/mimetex.zip
unzip mimetex.zip
cd mimetex
cc -DAA mimetex.c gifsave.c -lm -o latex.cgi
# test the binary, view the ‘fermat.gif’ image
./latex.cgi -i “a^2+b^2=c^2” -e fermat.gif

Uploaded to host, latex.cgi runs without any dependencies. The ugly thing with my (free) Linux host is that although it does allow CGI, it doesn’t allow CGI to return documents of type ‘image/gif’ no matter what. To work around, I wrote a small PHP script, which parses the GET input, calls CGI to generate and save image in a cache directory, then redirects request to the LaTeX image. This also helps not to expose your CGI directly on the web too!

// use ‘system’ command to execute CGI
$cmd = “$mimetex_path -e “.$full_filename;$cmd = $cmd.” “.escapeshellarg($formula);
system($cmd,$status_code);
$text =$pictures_path.”/”.$filename; return$text;

I’ve been always loving CGI for its simplicity, CGI, Perl, Python… old things never die! Although I have almost no experiences with them, they let you do whatever you want to given a little tweaking know – hows. You can go and test my LaTeX rendering server at http://tkxuyen.com/latex.php, the url syntax: latex.php?formula=$$latex code$$, here is an example. Please note that MimeTeX is not as full – featured as LaTeX, it can’t render some too – complex expressions and it uses an ugly bitmap font. If your server has some LaTeX support, consider using MathTeX, a more advanced version from the same author.

# Win vs. Mac font rendering (and the way for Linux)

We could easily see the very poor font rendering quality of Windows right on Windows itself using Safari. Safari has different smoothing modes (image above) and another mode named “Windows’ standard” (image below)

Differences between font rendering on Ubuntu (above) and Windows (below).

everal years ago, on earlier versions of Fedora, Ubuntu… font rendering is just a crap! Many people would find Windows better at text rasterization, and both are far inferior compared to Mac. In latest versions of Linux desktop, things are much improved, while Windows (Vista, Win7) is still much lagging behind, Linux made bold advances from lessons learned from both Win and Mac!

Novice users on Windows would find its text sharper, clearer and easier to read, while Mac’s one is a bit blurry! That is because Mac and Win have different origins and targets! Apple has deep legacy in graphics designs and desktop publishing, its algorithms try to preserve the nature of typefaces as much as possible, which implement true sub-pixel rendering aiming at high-resolution output devices. Meanwhile, Win sticks to pixel unit and aims at low-resolution device (like computer screen which usually less than 100 dpi in resolution).

The consequence is that while Win’s text look sharper and clearer on screen, it would turn into a whole crap when come to printing, where Mac’s publishing products are closer to its screen look! Even worse, Windows text rendering solutions are just suitable for simple typefaces, when complex, high-quality font is needed, the output is usually very poor due to various wrong implementations in hinting, anti-aliasing, kerning algorithms. This paper (2007) addresses in details many Microsoft’s implementation problems, and suggest the correct ways for text rasterization, resulting in a now-much-better Linux desktop!

(If you’re using a Mac or a Linux desktop, you would see this blog text in VN URW Gothic L, a aesthetically fine font. Windows readers would only see the text in Arial, as I have to turn off font embedding for Windows due to its very poor presentation.)

### Update, Feb, 20th, 2011

The font used now is Tex Gyre Adventor, an enhanced font based on URW Gothic L, you can see the hinting is quite better, especially for Vietnamese text. The trade – off is that file size is much larger, almost triple the URW Gothic L’s size.

# linux sound server

1. Configure the PulseAudio server to broadcast itself and receive connections from clients. Configure the PulseAudio client to redirect audio output to server.

2. GMPC remotely play music on a MPD server.

ome funs with Linux sound system. Today, a small, lightweight laptop is well – suited for all my everyday need: email, web, office, music, video… A home PC is mostly used as file server or backup system. However, one thing you could never be pleased with the laptop is its sound, at least you still need a PC with good soundcard & speakers to enjoy music! Being lazy to plug-in the speaker jack most of the time, and in order to get rid of all those cables, we can choose two following approaches:

### Setup a Sound server

1. Setup PulseAudio server on the PC machine and configure it to accept client connections. 2. setup PulseAudio client on the laptop. 3. We can choose to direct audio to local laptop headphone or to the remote PC (with our beloved good – quality speakers). PulseAudio can be a pain on some systems since Linux sound has always been a mess: ALSA, OSS, ESD, PulseAudio… As of Ubuntu 10.04 (Lucid Lynx), PulseAudio is quite stable, you would only need to:

# this will install PulseAudio device chooser
# which then trigger other dependency packages

Some old Linux apps (like XMMS, the music player I loved) would not know about PulseAudio. We need to configure it to use ALSA, which has been re-configured to work in bridge mode (ALSA would simply redirect signal to PulseAudio then).

### Setup a Music server

Using MPD (Music Player Daemon – a music player working in client / server mode using a simple TCP text protocol) and a client like GMPC (Gnome Music Player Client). Though it may take some times tweaking around to get MPD working with PulseAudio, this would play very well mp3 files you stored on the server. I’ve been using all these 2 methods to have my music played while lying on sofa or in bed!

(And if you’re a vim – addicting user, you could use vimmpc to serve music for yourself while working inside vim).

# dell mini 9 hacks

collective compile of various hacks on the Dell Inspiron Mini 9. People has found lots of things to play around with this tiny toy. The fact that though a compact machine, the Dell Mini 9 still has some space and slots (power, data) inside to embed a few more devices internally. These hacks range from little enhancements to very useful features for someone. I would really want to try adding a touch screen to my Dell mini sometimes.

One member of the My Dell Mini forums decided to add a “hard drive activity” indicator. He managed to do this without replacing either the low battery indicator or the power LED by placing a new blue LED near the battery light. So when the SSD is in use (the Dell Mini doesn’t actually have a hard drive, but rather a solid state disk), the blue light glows. When your battery light gets below 10%, it will blink orange.

Wireless mouse is very handy, I would always want to get rid of mouse cable. In this hack, the “hacker” mount the Nano Receiver for Logitech VX Nano laser mouse into the Mini 9 without breaking down the receiver or soldering it in. That way it can be removed or replaced easily in the future.

Today, a GPS receiver chip is quite cheap (and small). We can solder an (USB) GPS chip onto the toy’s board, and turn the machine into a GPS – enabled device, on which various interesting applications can be deployed. This is really a brilliant idea! (besides: GPS receiver chip with size of a small dime). Well, if you don’t have a car with GPS navigation, you can carry the Dell Mini with you! But don’t blame it if the navigation software tells you about the safe road ahead while you’re at bottom of a lake!

You can also turn your Dell mini 9 into a 3G mobile phone by adding a PCIe WWAN card. In this simple hack, you replace the machine’s wireless card by the WWAN card, plug a SIM in, and using software like MobiLink to make telephone calls. Of course with 3G, you can have Internet and other things come with WWAN.

With the 8.9″ LCD (quite small), a point and click device like touch screen is very neccessary. I found this hack the greatest one on Dell Mini 9, you can leave your mouse at home, browsing (web, file…) and other various tasks can be done by touching directly onto your screen. Imagine we can install an (online) handwriting recognition package and input Chinese directly on the screen (though we’d had SCIM which does the job quite well). Packages for Chinese handwriting recognition are available in some Chinese Linux distros.

### 6.   Install Mac OS X

Mac OS X (10.5 – Leopard) run smoothly on Dell Mini 9. This is perfect for ones who adore Mac look and feel. Just download the Leopard ISO file, burn a DVD, boot up the machine with an external DVD drive and proceed with the installation. However, to take, you have to give somethings, ethernet simply won’t work, however, you can manage to get through with wifi and sound.

# dell inspiron mini 9

y new Dell Inspiron mini 9 notebook: the company laptop is far too heavy to carry back and forth daily, and this is really a cute tiny toy to have. Having dimensions briefly larger than a pencil, the notebook is really light, its display is bright and clear, sound is pretty good, and the external speaker is amazing for such a mini notebook.

This is a laptop with no moving part: hard disk is solid – state (16GB), no ventilating fan (the temperature is just right after long use). The disadvantage with the toy is that keyboard is quite small and strange, which may take times to get familiar with. Ubuntu (Hardy Heron) came pre-installed, and every softwares work out-of-the-box: graphics, sound, wifi, webcam…

The distro is a customized version for Dell called Netbook Remix, however, after a while, I get bored with that and switch to the default Gnome view. The good point is that mp3, Acrobat Reader, Adobe Flash, Sun Java… licenses come with the distro, there’s no need to hack for these stuffs. Please see below for some GUI screenshots.