On Sun, Jul 29, 2012 at 10:44:24AM +0100, abdelkader belahcene wrote: <snip> > While on the machine where they didn't , > nothing is displayed , I mean > # dmesg |grep ttyS > # > > So How to activate the ports !!! thanks a lot I would start by checking the BIOS setup to be sure they are not disabled. Mike -- Satisfied user of Linux since 1997. O< ascii ribbon campaign - stop html mail - www.asciiribbon.org