I have solved the crash, installing nvidia driver. So it was perhaps due to nouveau ?
But now, I haven't the computer available (it was the one of a friend) I'm not able now to test it, sorry ... But I will try it as faster as I will can ... Thanks A+ -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1513799 Title: X crash with Dell XPS 890 Status in xorg package in Ubuntu: Incomplete Bug description: I have tried with Ubuntu 12.04, Ubuntu 14. 04 With these versions, X crash, and I can open another console (Ctrl-Alt-F1, ....) I have kept the log files, adding lspci -v and lshw outputs : alternatives.log bootstrap.log gpu-manager.log apport.log casper.log kern.log Xorg.0.log auth.log dpkg.log Xorg.failsafe.log boot.log fontconfig.log lspci.log Xorg.vesa.log lspci-v.log lshw.log I have also tried with Ubuntu 15.10 and Ubuntu-Mate 15.04, and it crashes also, but I can't keep something. Passing on Console 1 or 2 ... I see error messages scrolling quickly on the screen. I'm just able to read 'Error' and (pci...) Keyboard don't respond anymore, and I must stop the computer with the button. The X server crashes with a live-cd, in fact an usb device with multisystem, but I don't think it could be the reason, as I use it without problem with other computers. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1513799/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp