Well I'm sorry, I found it was due to the enabling of the "clean startup" service from the kubuntu control panel. this one seems to act as if it was cleaning sorts of sockets created before by ksmserver and consequently, this latter can't find its own track and fell in some kind of login loop.
everything's ok after disabling it ! ----- Mail Original ----- De: "Bryce Harrington" <br...@bryceharrington.org> À: romainmad...@free.fr Envoyé: Vendredi 26 Juin 2009 02h35:07 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne Objet: [Bug 388018] Re: [jaunty] back to log screen after entering password ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Confirmed -- [jaunty] back to log screen after entering password https://bugs.launchpad.net/bugs/388018 You received this bug notification because you are a direct subscriber of the bug. Status in “xserver-xorg-video-ati” package in Ubuntu: Confirmed Bug description: Binary package hint: xorg Current Operating System: Linux xxx 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 Well I come back from holidays, and I would like to turn on my laptop, then comes the log screen from kubuntu jaunty and here I stay because when I enter my passwd, something occurs and then comes back to the log screen !! here is my dmesg, it looks like it's linked to a mtrr problem (see between 40 and 50) : I'll leave attached dmesg, /var/log/Xorg log as well as the lspci -vvnn results! Please help so I can log in ! -- [jaunty] back to log screen after entering password https://bugs.launchpad.net/bugs/388018 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp