Steve's Ubuntu Weblog

My New Blog

steveyoung — Tue, 16 Aug 2011 20:47:04 +0000

In future I’m going to be blogging here

Nautilus in Ubuntu 11.04 Natty Narwhal

steveyoung — Sat, 13 Aug 2011 14:44:26 +0000

I have had a couple of issues with Nautilus since upgrading the Ubuntu 11.04.

Where is the menu bar? Until I got used to Unity I didn’t realize that the menu for each application with focus is in the desktop menu bar. Its pretty neat when you get used to it.

Shortcuts. Because of the issue above I couldn’t find hidden files until I remembered Control-h which I haven’t used in years. This got me to thinking of the other shortcuts so I made a short list and posted it here.

Location Bar. I prefer a text based location bar because I like to cut and paste from it. Here is how to make a text based location bar the default.

Nautilus Location Bar

steveyoung — Sat, 13 Aug 2011 14:31:38 +0000

I have always preferred to use the text based location bar in Nautilus as it is useful for cutting and pasting into other applications etc. In earlier versions there was a button to switch from the breadcrumb view to the text based view but this button is missing in Natty Narwhal. You can switch to the text based view with Control-l or select Go -> location but the next time you open a window the breadcrumb view is back.

To permanently have a text based location bar go to a terminal and type:

gconf-editor

In the editor click on apps in the left hand column and then select nautilus and preferences. Check the box at the side of always_use_location_entry in the right hand box.

That’s it.

Nautilus keyboard shortcuts

steveyoung — Sat, 13 Aug 2011 14:11:11 +0000

I have recently installed Ubuntu 11.04 on my laptop and until I got used to Unity I couldn’t find the menu bar for the nautilus window. I found out later that the menu for the application in focus appears in the desktop menu bar. However I urgently needed to find a hidden file and I half remembered that the keyboard shortcut was Control-h. That worked and so I started looking up other keyboard shortcuts and have put them together in a list below. I hope they are useful to someone.

Ctrl+A – Select All
Ctrl+D – Add to Bookmarks
Ctrl+B – Edit Bookmarks
Ctrl+W – Close Window
Ctrl+Q – Close All Windows
Ctrl+R – Reload/Refresh Window
Ctrl+S – Select Items Matching (Enter the pattern)
Ctrl+L – Go To Location Bar
Ctrl+H – Toggle ‘Show Hidden Files’
Ctrl+C – Copy Selected
Ctrl+X – Cut Selected
Ctrl+V – Paste Selected
Ctrl+T – Open New Tab
Ctrl+1 – Icon View
Ctrl+2 – List View
Ctrl+3 – Compact View
Ctrl++ – Zoom In
Ctrl+- – Zoom Out
Ctrl+0 – Reset Zoom Level
Ctrl+Shift+I – Invert Selection
Ctrl+Shift+N – Create New Folder
Ctrl+M – Create Link (Shortcut) [Highlight the file / folder first and then use press Ctrl+M]
Delete – Delete To Trash
Shift+Delete – Delete Permanently
Alt+Enter – Properties
Alt+Up – Open Parent Folder
Alt+Left – Go Back
Alt+Right – Go Forward
Alt+Home – Go To Home Folder
F1 – Open Help
F3 – Toggle Dual Pane Mode
F9 – Toggle Side Panel

Ubuntu 11.04 and nVidia Optimus

steveyoung — Thu, 11 Aug 2011 19:58:17 +0000

After installing Natty Narwhal on my new Packard Bell Easytone HR11 it booted into Gnome instead of the new Unity desktop. After googling around I discovered that the nVidia Optimus technology was to blame. Optimus switches from the low power consuming Intel GPU which is used for basic applications to the more powerful nVidia GPU when gaming or watching movies. Optimus, as delivered from nVidia, is not available for Ubuntu.

Fortunately here is a solution for using Optimus with Ubuntu called Bumblebee. to get Bumblebee up and running first open a terminal and add the Bumblebee repository and then install Bumblebee.
sudo apt-add-repository ppa:mj-casalogic/bumblebee
sudo apt-get update && sudo apt-get install bumblebee

During the installation you will be asked if you want to configure Bumblebee, select “Yes”. You will then be asked to select manual configuration or to view a list of configurations, select “Full List” and from the list select your laptop. If you have a Packard Bell Easynote pick “Packard Bell EasyNote TSX66HR: SteveYoung” and then “Use this Configuration”. In the next screen select “XV(Default)” You should then see a message saying that Bumblebee has been installed.

Now typing “optirun” before an application will cause the nVidia GPU to be used rather than the Intel GPU, with improved performance as can be seen below.

steve@steve:~$ optirun glxgears * Starting Bumblebee X server bumblebee _PS0 Enabling nVidia Card Succeeded. [ OK ] 3178 frames in 5.0 seconds = 635.511 FPS 3326 frames in 5.0 seconds = 665.190 FPS 3122 frames in 5.0 seconds = 624.271 FPS 3250 frames in 5.0 seconds = 649.854 FPS 3174 frames in 5.0 seconds = 634.725 FPS * Stopping Bumblebee X server bumblebee _PS0 Disabling nVidia Card Succeeded.

As opposed to the fps without Bumblebee.

steve@steve:~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 302 frames in 5.0 seconds = 60.277 FPS 301 frames in 5.0 seconds = 60.160 FPS 301 frames in 5.0 seconds = 60.160 FPS 301 frames in 5.0 seconds = 60.160 FPS XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0" after 2757 requests (2757 known processed) with 0 events remaining.

You can also install the bumblebee.ui using
sudo apt-get install bumblebee-ui
This places an indicator in the Unity notification area which changes colour when the nVidia GPU is in use and also allows you to configure which applications to use “optirun” with automatically.

Bumblebee uses the nvidia-current driver and I am not sure that this is the best driver for the GT540M which is in my laptop. I think that the figures of 650fps achieved with optirun glxgears can be improved on and if anyone has any ideas about how to do this please share them with us.

Ubuntu 11.04. Wrong keyboard keeps reappearing as default

steveyoung — Thu, 11 Aug 2011 15:06:29 +0000

When I installed Ubuntu 11.04 on my laptop there was a problem with selecting a keyboard other than USA. If I selected any other keyboard the installation hung for minutes, so eventually I accepted the USA keyboard thinking I would change it later. Everything installed so I went to System Settings and chose Keyboard in the Control Center and under the Layout tab I removed the USA keyboard and added a German one.

However after every reboot the USA keyboard was back and worse still was default, so I had to keep switching back to German. Removing the USA only resulted in it reappearing after a reboot.

Eventually I found the answer. Go to /etc/default/keyboard and change the line XKBLAYOUT="us" to your desired keyboard and re-boot.

XKBMODEL="pc105" #XKBLAYOUT="us" XKBLAYOUT="de" XKBVARIANT="" XKBOPTIONS=""

No wireless networks with Easynote laptop and Ubuntu 11.04

steveyoung — Thu, 11 Aug 2011 13:56:21 +0000

I assume that all of these laptops use the broadcom wireless adapter but to check open a terminal and type:
sudo lshw -C network
The ethernet and wireless interface information will be shown.

If you indeed have a broadcom interface connect to the internet via an ethernet cable and open the Synaptic Packet Manager and install b43-fwcutter then firmware-b43-installer or open a terminal and type:
sudo apt-get install b43-fwcutter sudo apt-get install firmware-b43-installer

Remove the the ethernet cable and restart Ubuntu and the wireless network should be available.

Packard Bell Easynote HR11 and Ubuntu 11.04 Natty Narwhal

steveyoung — Thu, 11 Aug 2011 13:26:52 +0000

I recently bought a laptop and installed Ubuntu 11.04 Natty Narwhal on it. As usual I will blog about any issues as and when they arise.

The laptop I bought is a Packard Bell Easynote HR11 and the first thing I did was to reduce the Windows partion. To do this I used the partition manager in windows 7 rather than risk using GParted with a Windows partition. I don’t know if this is necessary but I thought it was better to be safe than sorry and the tool is available for free in the Windows 7 anyway. A good Howto on shrinking the Windows partition is here

After shrinking the Windows partition I changed the BIOS boot order to make the DVD boot first and then inserted the Ubuntu 11.04 DVD and booted the laptop via the DVD.

From the menu I chose “install Ubuntu” and the installation started. There was a problem with choosing a keyboard during the installation and the installation hung if I chose anything other than a USA keyboard, so in the end I accepted the USA keyboard and the installation completed successfully. This keyboard issue was still giving me problems for a while after installation but I fixed it like this. After removing the DVD and re-booting I got the Grub menu with both Ubuntu 11.04 and Windows 7 as options plus some emergency recovery options. Ubuntu is the default and will run if you press enter or wait for 10 seconds.

My first disappointment was that the new desktop Unity didn’t start but instead I got Gnome. The reason for this lies in the Nvidia Optimus technology which switches from the Intel to the Nvidia GPU when more graphics power is required. I have managed to fix this problem for now but I still see room for improvement. You can read the blog about this here.

The second problem was the fact that the WLAN wasn’t working. I have blogged about how I solved this problem here.

XAMPP in Ubuntu. “/opt/lampp/bin/mysql.server: 84: source: not found.”

steveyoung — Sun, 21 Nov 2010 15:32:22 +0000

I am having a problem installing XAMPP because I have an Apache server already running, I will give details of how I get around this after I have fixed it. Meanwhile every time I started XAMPP with sudo /opt/lampp/lampp restart I got the following warning:

/opt/lampp/bin/mysql.server: 84: source: not found.

It turns out to be the old dash/bash problem that I wrote about over 3 years ago here

The solution is to change #!/bin/sh to #!/bin/bash in /opt/lampp/bin/mysql.server using Gedit sudo gedit /opt/lampp/bin/mysql.server

Javascript fifteen puzzle with pictures

steveyoung — Tue, 09 Nov 2010 08:37:20 +0000

I have written a JavaScript version of the famous fifteen puzzle which you can play online. You can play either the easy version with numbers on the tiles to help you or remove the numbers and play only with the tiles containing a part of the picture. High scores are recorded for both versions for both speed and minimum clicks. Please have a go and let me know what you think, suggestions for improvement are always welcome.
The game is here