Debian Development team announced on May 07, 2016. Stating that they are going to drop the older i386 architecture processor support on Debian 9 (stretch) release cycle. It was decided on last year to increase the minimum CPU features for the i386 architecture to 686-class. This means dropping support for 586-class and hybrid 586/686 processors.(Support for 486-class processors was dropped, somewhat accidentally, in squeeze.)
This was implemented in the Linux kernel packages starting with Linux 4.3, which was uploaded to unstable in December last year. gcc library of i386 has been changed recently to target 686-class processors which will crash other processors. Whoever running testing or unstable, they are advise to use jessie which will support until at least 2018, and until 2020 if i386 is included in jessie LTS.
The following processors, supported in jessie, are now unsupported.
- AMD K5, K6, K6-2 (aka K6 3D), K6-3
- DM&P/SiS Vortex86, Vortex86SX
- Cyrix III, MediaGX, MediaGXm
- IDT Winchip C6, Winchip 2
- Intel Pentium, Pentium with MMX
- Rise mP6
- VIA C3 ‘Samuel 2’, C3 ‘Ezra’