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#1 2019-11-14 10:53:31

Registered: 2019-11-13
Posts: 11

new pacman will auto-install pentium4 packages

By Erich Eckner
On 5/15/2019, 11:36:51 AM

The next release of pacman (after pacman 5.1.3-1.3) will set the architecture to "pentium4" if you have

Architecture = auto

in your /etc/pacman.conf and your machine supports sse2 instructions.
This requires reinstallation (and if necessary a downgrade) of all installed packages, e.g. by running

pacman -Syy
pacman -Qqn | pacman -S -

Note, that this is only possible and necessary after pacman > 5.1.3-1.3 gets installed.
Also note, that it's not a good idea to stick with i686 if your machine supports sse2, as more and more packages require sse2 and will be dropped from the i686 repositories, thus.

Edit: There seems to be a flaw in the sse2 detection logic of pacman 5.1.3-1.4 - it correctly switches to pentium4 on my test vm, but not on my test real hardware (both with sse2). You can check with

pacman-conf Architecture

if it changes to pentium4 for you - and apply the above steps only if it does so.
I'm working on it ... stay tuned.


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