How to install Scipy on Ragnar's image.

I also tried to install iPython then I got this error:

sudo apt-get install ipython

Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main ipython all 0.13.1-2
  404  Not Found
Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/i/ipython/ipython_0.13.1-2_all.deb  404  Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

python-scipy:

Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main libssl-dev armhf 1.0.1e-2+rpi1
  404  Not Found
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main libssl-doc all 1.0.1e-2+rpi1
  404  Not Found
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main python2.7-dev armhf 2.7.3-6
  404  Not Found
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main python-imaging armhf 1.1.7-4
  404  Not Found
Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/o/openssl/libssl-dev_1.0.1e-2+rpi1_armhf.deb  404  Not Found
Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/o/openssl/libssl-doc_1.0.1e-2+rpi1_all.deb  404  Not Found
Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/p/python2.7/python2.7-dev_2.7.3-6_armhf.deb  404  Not Found
Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/p/python-imaging/python-imaging_1.1.7-4_armhf.deb  404  Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

It seems like I should update and upgrade the OS but it will mess up the Wolfson driver, right?

You should update but not upgrade.

sudo apt-get update is safe, it doesn't touch your installation. It will only update the list of the Raspbian repository mirrors.

sudo apt-get upgrade  will download and install newer versions of things.

Is it only the driver configuration files and use_case scripts that matter?(This sounds too good to be true.....)

Yes, pretty much.

There should be a safety copy of the Wolfson kernel - /boot/kernel_wolfson.img. If an upgrade destroys the Wolfson drivers, just

sudo cp /boot/kernel_wolfson.img /boot/kernel.img

to get the Wolfson drivers back.

--

Ragnar

Thanks for reply Ragnar.

If I could simply swap the copy of the Wolfson Kernel after upgrade, why did you recommend not to do it?

Is there a risk that it might not work after upgrade even if you'd restore configuration files?

The update fixes missing URL to the repositories which is what you need for comment at top. Safe and first try. Do more later if does not work IMHO.

Clem

Dear Clem,

Safe and first try. Do more later if does not work IMHO.

What do you mean by this? Do you mean fix the URL then try upgrading if it doesn't work?

Run apt-get update please

I want you to take small, safe steps as clem57 points out.

If I could simply swap the copy of the Wolfson Kernel after upgrade, why did you recommend not to do it?
Is there a risk that it might not work after upgrade even if you'd restore configuration files?

Yes, there is a risk, albeit a small one. An upgrade will pull in more than a years worth of upgrades of who-knows-what. There is a possibility that some upgraded things will cease to work when you restore the kernel. And I don't know which things that might break, or how problems might manifest themselves.

--

Ragnar

Update adds only new repositories <== safe would do in my sleep.

Upgrade will take software down to your machine. <== may not want.

Clem

I didn't have clear understanding of apt-get update. I thought it would simply show you the list of updates but it actually updates the local repository urls. Thank you for your kind answers Ragnar and Clem