Laptop system migration. How to do it as smooth as possible?

[urcindalo]

Hi everyone.

My old laptop died (Packard Bell EasyNote TJ62, the worst piece of hardware I've ever had) and I have just ordered a new Asus X45HR-SX196V for a very good price. I will get it next Tuesday, October the 30th.

I intend to copy over my old Gentoo installlation from the old HD to the new one. Apart from the obvious kernel reconfiguration through chroot, I'd like to experience the smoother migration possible. So, I have a few questions for the geek in you:

a) Which processor type and features must I select in both the kernel and /etc/make.conf?
* New CPU: Intel Core i3-2350M
b) After a reboot into the new kernel with suitable drivers and modules for the new hardware, will the copied over portage @world work? I guess so since both CPUs are amd64 and I'm upgrading, but I ask just in case (old CPU:AMD Athlon Dual-Core QL-65).
c) Both laptops, old and new, include a dedicated ATI graphics card. Since I used the ati xorg driver in the old one, I guess I won't have any issues booting into a graphical display with the new laptop for the first time, will I?
d) Anything else I didn't mention I should think of or take care of?

My intention is to recover my working box as soon as possible. Later on, and patiently, I will re-emerge @world with the new settings in make.conf.

Thanks in advance.

[The Doctor]

If you set -mach=native or similar for the AMD Athlon Dual-Core, you can't use the binaries on the Intel i3.

I would stick with CFLAGS="-march=native -O2 -pipe" as they are fairly safe settings, and march=native is the optimum cpu setting.

Unless you intend to rebuild your entire system on your old laptop first, I don't think you can do that. The best you can hope for is coping your config files and data.
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First things first, but not necessarily in that order.

Apologies if I take a while to respond. I'm currently working on the dematerialization circuit for my blue box.

[Jaglover]

There is a good chance the base system will work, but you need to do emerge -e world to rebuild your apps.
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My Gentoo installation notes.
Please learn how to denote units correctly!

[urcindalo]

Thanks for your help.

[Veldrin]

there is no such thing a -march=amd64. Check your -march= again (once you have it on the new machine)

The main problem is, that code optimized for an amd cpu use 3dnow instruction, which are not supported by intel cpus. luckily those instructions are only (mostly) used by multimedia/graphical application.

So what Jaglover meant to explain, is that you could your system up and running to some part (read CLI), but do not expect everything to work.
And instead of having to figure out which package actually needs rebuilding, and which does not, just run emerge -e world to rebuild everything. Yes, it is slightly an overkill, but is still faster than rebuilding the box from scratch.

HTH
V.
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read the portage output!
If my answer is too concise, ask for an explanation.

[urcindalo]