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View Full Version : [ubuntu] Upgrade from 8.10 32 bit to 9.04 64 bit ?



dr_alejandro
April 23rd, 2009, 07:41 AM
Hello,

I'm running the 32 bit version of Ubuntu 8.10. I am considering to change to the 64 bit version when in upgrade to 9.04. I know I can upgrade to 9.04 with Alt+F2 and type in “update-manager -d” .....
but that will install the 32 bit version of 9.04. Am I right?

If I want to install the 64 bit version of Ubuntu 9.04, do I have to make a fresh installation (burning the ISO to a CD)? Or can I install the 64 bit version of Ubuntu 9.04 from the version of Ubuntu I'm running (32 bit version)?

Brian_the_King
April 23rd, 2009, 07:42 AM
Someone correct me, but you will have to format and start over fresh.

ArsHermetica
April 23rd, 2009, 07:57 AM
You'll have to start from scratch unless i'm missing something huge.

MaindotC
April 23rd, 2009, 08:00 AM
No you cannot upgrade from 32 to 64 without reinstalling as the others have stated. That would be an interesting feature in the future, though. Maybe some way to take your machine from 32 and put it into 64 bit mode...

pbpersson
April 23rd, 2009, 08:05 AM
That would be very much like if you had a 10-story office building and you wanted to replace the foundation under the building and the building itself without moving a single piece of office furniture.

It is better just to start from scratch.

andy75180
April 23rd, 2009, 09:19 AM
Yes, you will definitely have to start over fresh to do this. I changed my motherboard/processor to a 64 bit one and had to do a complete reinstall.

Do you really need to change to 64 bit? If you don't have over 4gb of memory I don't see any point.

dr_alejandro
April 23rd, 2009, 04:42 PM
Yeah that's what I suspected. I do have 4GB of RAM, I do not have to run the 64-bit version but i might as well use that extra GB I'm not using. It might take me a few 1 or two days to configure the computer like I had it in the 32-bit version (plugins, themes,...) but I'm curious of to use the 64 bit.

MaindotC
April 24th, 2009, 03:49 AM
If you want to use all 4 GB with a 32-bit Ubuntu you need to recompile the kernel with an option that I can't remember. If you ever find it lemme know.

drs305
April 24th, 2009, 03:54 AM
If you want to use all 4 GB with a 32-bit Ubuntu you need to recompile the kernel with an option that I can't remember. If you ever find it lemme know.

I believe it's called PAE.

dr_alejandro
April 25th, 2009, 04:34 AM
Thanks! I'll look into that.

andy75180
April 25th, 2009, 11:29 PM
Yes, PAE (Physical Address Extension) allows up to 64GB of memory on a 32-bit machine. But the memory will be slower.

schettj
June 18th, 2009, 01:48 AM
Yes, PAE (Physical Address Extension) allows up to 64GB of memory on a 32-bit machine. But the memory will be slower.

Or just install the server kernel via synaptic, which includes PAE. I'm running a 4gb and a 6gb dual core machine with the server kernels, and they see all that ram just fine (except for possibly a small hole for the graphics card memory, YMMV depending on your bios)

LepeKaname
June 18th, 2009, 02:06 AM
As far as I know you can use up to 8GB in the 32bit version... but it does not run natively... My general recommendation is to stay in 32bit, 64bits usually is not as stable.