Linux on Film: Ubuntu on a Macbook with Xbox Kinect in a hospital operating room

Linux on Film: Ubuntu on a Macbook with Xbox Kinect in a hospital operating room via my other blog :)

Upgrading to Ubuntu 12.04

I recently upgraded several PCs to Ubuntu 12.04, either from 11.10 or from 10.04. Most upgrades went just fine apart from one, on the Dell Latitude D505 which for some reason didn't download half the updates and had to do a sudo apt-get upgrade afterwards to get them all installed. It is apparently not recommended to upgrade from 10.04 to 12.04 until 12.04.1, though I had no problems doing so on one PC I tried. On my main desktop I did have to change my Gtk theme to Adwaita since the theme I was using (Ambiance Blue) has not been updated to work with 12.04 yet, and is simple to switch using Ubuntu Tweak.

12.04 just feels like a slightly more polished version of 11.10, but this might be because I don't use Unity, which apparently has had a lot of improvements. I did try it again briefly and it's good that there's now an option to have the dock on each monitor or not in a multi-monitor setup. However I still prefer to have a dock (I use Cairo Dock) on the right hand side of my right-hand monitor, which isn't possible with Unity, so I use Gnome Classic which is, thankfully, still available in 12.04. Also Unity would be far better without the annoying Global Menus, which are not conducive to multi-tasking for me, and I don't want everything to full screen all the time.

I also tried the standard Gnome desktop, it is slightly better than Unity in some ways, apart from it needs decent hardware acceleration and the virtual desktops don't work properly on dual monitors (switching only works on main monitor). It also seems it needs more tweaking than Classic to get it how I would want it and in Gnome I miss my wobbly windows! The only thing I like about Gnome Shell and Unity is both have a good search function, it's easy to search for apps and files, other than that they both miss the mark for me. The search function in nautilus is fine for searching for files for me at the moment.

Overall, 12.04 brings quite a few other improvements over 11.10 such as better battery life, the new Privacy Manager feature in System Settings, and many others. In fresh installs, Tomboy has been removed (I've recently switched to using Evernote instead so I probably won't install it on fresh installs), and Rhythmbox has replaced Banshee as default music player. This does not bother me since I mainly use Gmusicbrowser which is far quicker and lighter than either of those, it scans my large mp3 collection in no time at all, unlike Banshee and Rhythmbox which seem to take hours! Ubuntu 12.04 is a solid LTS release, and well worth upgrading to, though I (and Canonical) would recommend waiting until 12.01.1 to upgrade PCs running the previous LTS, 10.04, or consider fresh install if you cannot wait!

Ubuntu 11.10 On Dell Latitude XT (video)

I recorded a little demo video of Ubuntu 11.10 64bit running on my XT tablet/laptop, showing Google Earth, Fennec (Firefox Mobile) browser, drawing in GIMP using the stylus, and Nautilus showing Compiz' wobbly windows effect. I used a Trust webcam hooked up to my Ubuntu desktop and recorded using Cheese which can be found in Ubuntu's repositories. Blogger won't let me embed the video so here's the Google+ link.

Gnome Classic - My Perfect Desktop (For now!)

I am at peace again in the Linux world, at least for now, I'm quite happy with the Gnome Classic desktop on Ubuntu, and finding it smoother and better looking than XFCE, but without the clusterfuck of Unity or Gnome3. I really have tried to like them, I've given them every chance but they both seem to be about reducing what I can do at the same time, this might be fine on a tiny netbook or tablet but not on the desktop. When I use them I feel like I have one hand tied behind my back. I've even tried Unity on a tablet and for a brief time it was OK, it still didn't feel right. it doesn't help that they both require decent graphics acceleration to get the most out of them, and the Global Menus of Unity are infuriating!

Gnome Classic does take a little tinkering to get it just right in 11.10 but not as much as other desktops, and it's worth the little effort required. There's a good page on AskUbuntu on how to get things working nicely, the main thing is switching the default tray applet out and adding the full Indicator Applet and reducing the size of the top panel. Also you might like to get Alt + F2 run dialogue back too. I hope Canonical keep Gnome Classic available for as long as possible, or at least until XFCE switches to GTK3. Here's how my main dual monitor desktop looks:

Enabling a Fingerprint Reader in Ubuntu 12.04

I got this to work with my Dell Latitude XT, but it should work with some Lenovo Thinkpads and some HP laptops that have the same SGS Thomson Microelectronics fingerprint reader or other supported readers. As Thinkfinger isn't available in the Precise repositories, I had to download the Natty packages from here and install them manually with

sudo dpkg -i libthinkfinger0_0.3+r118-0ubuntu4_amd64.deb thinkfinger-tools_0.3+r118-0ubuntu4_amd64.deb libpam-thinkfinger_0.3+r118-0ubuntu4_amd64.deb

You could also try compiling them (which i tried, unsuccessfully!) from the tar available here. Then i followed the instructions on the Ubuntu Wiki for Thinkfinger.

Once that's done reboot and you should be able to tap your username on the login screen, swipe your finger, then tap 'login' and you should be able to login. You can even swipe while doing sudo commands on the commandline! The only slight problem when swiping your finger to login, is it doesn't unlock the login keyring, so you'll have to enter your password once (you can use the Onboard onscreen keyboard if you're using a tablet). There apparently used to be a workaround but that is now long out of date.

Enable Screen Rotation in Ubuntu on convertible laptop/tablets

For those with Linux on convertible tablet/laptops like the Dell Latitude XT and XT2, HP xc4400 etc, you might find Magick Rotation useful, it enables automatic screen rotation when you switch between laptop and tablet mode. Download and extract Magick Rotation, then make sure the magik-rotation file is executable, the right click and run it, or cd into the directory and do ./magick-rotation. Follow the instructions in the readme as it may vary depending on make/model. I've just set it up on Ubuntu 12.0.4 on my XT and it works very nicely. I've disabled the Cell Writer function as I don't need it but may be useful for those who use portrait mode and use the stylus to write notes.

Windows 8 and Ubuntu 12.04 Beta On a Dell Latitude XT

I have acquired a slightly faulty Dell XT convertible tablet/laptop, the screen no longer stays up in laptop mode and it's also lacking it's pen stylus. Specs-wise it's similar to my Latitude D430, a Core2Duo CPU at 1.33Ghz, 2GB RAM, except this has ATI X1250 graphics instead of Intel 950 and an 80GB 1.8" hard drive instead of a 60GB 2.5" drive. I am unsure as to how to get multi-touch capabilities in either Windows 8 or Ubuntu, in neither does it work out the box, perhaps the Windows Vista drivers may work in Windows 8.


Windows 8

When it was new it would have come preinstalled with Windows XP or Vista. Since the Windows 8 'Consumer Preview' had just been released I decided to have a little play with it on the XT. I used the docking station's DVD drive to install it and it took about 30 minutes. Single finger touch works out the box.


















Windows 8 feels clunky to me, like Windows 7 with the ugly Metro interface bolted on the front. Switching from the touch-friendly Metro to the not very touch friendly desktop and back again feels awkward, and doing that every time I want to search for an app gets old fast! I'd much rather use an OS that is built for touch screen mobile devices from day 1, such as Android, iOS etc. I did like the on-screen keyboard, but for web browsing it wouldn't pop up for Firefox, only IE, although apparently there will be an 8-friendly version coming soon.

Ubuntu

After a brief test of Mint with Gnome3/Cinnamon (which I can't get on with, not keen on the menus and the Mint hijacking of the Search Add-ons), I formatted it and installed Ubuntu 11.10 64bit liveCD. Then I upgraded to the latest 12.04 beta. Although I'm not that keen on Unity for the desktop, in this case it does suit a tablet and has improved a bit recently. Having said that I still don't like Global Menus and would prefer to be able to easily disable that feature. Again, the single-finger touchscreen works out-the-box. Unity is still not touch-friendly enough (grabbing those overlay scrollbars is tricky for instance) but feels and looks a lot nicer than Metro and the MyUnity tool is very useful too if you want to tweak Unity settings. Sadly, ATI dropped support for the X1250 graphics card, which means I can only use Unity 2D and some 3D games/apps don't work very well.

















 

For touch use, I've found it best to disable auto hiding of the launcher (Settings, Appearance, Behavior). Ubuntu's default onscreen keyboard is called Onboard. It's OK once you resize it so you can actually use it with your fingers, though I wish it would automatically pop up and hide for dialogue boxes, like Caribou does. Enable the onscreen keyboard from Settings, Universal Access Preferences. Onboard should also appear on the LightDM login screen too. If you have upgraded from an earlier version of Ubuntu that used the GDM2 login screen (or if LightDM is trashed and you have switched to GDM), you can make Onboard appear by adding "onboard -s 684x200 -x 170 -y 568 &" to /etc/gdm/Init/Default between the last 'fi' and 'exit 0' as shown in this how-to. No need to change any other settings as shown on there though. Update: The only really frustrating thing about Unity is the dock which on this device is far too easy to accidentally open apps when trying to scroll the dock!




















Overall Ubuntu 12.04 works fairly well on the XT, despite the lack of proprietary graphics drivers. With a bit more improvement, Unity could be a good touch friendly desktop, though I still don't plan on using it on my main dual-monitor desktop or other laptops and desktops where I prefer Gnome Classic or XFCE (Xubuntu). And despite the odd bug here and there which should be fixed by it's release, 12.0.4 should be a decent LTS.