giorsat wrote:mine is gdm3 18.104.22.168
could be some lib package? I update from testing but I am using xorg from sid and the liquorix kernel. all went well until this morning when I launched the mint- update (i noticed also a mintsystem update in the list) and I updated the system. after reboot, no more gdm working
Well if you choose to use a non standard kernel and an xorg from a different distro (yes it is a different distro) I guess you should not be at all surprised if you system doesn't work with normal updates that work for everyone else.
Of course it is your installation to do as you wish with, but at least if you want to experiment with it in this way you should keep a standard kernel around. So if you have kept one then boot into it and see if it works. If it doesn't then the answer is probably the non standard xorg. If that is the case you can only uninstall the xorg from sid and replace it with the standard version and see what that does.
In short, my guess is that the problem may of your own making - sorry
Fujitsu Lifebook AH532. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Lubuntu 13.10,Ubuntu12.10 (Unity), Mint16 (Cinnamon), Manjaro (Xfce).