I also have a T410 running the latest snaptshot. The screen of my laptop is 1280x800. I can't reproduce your issue.
Probably this has nothing to do with your issue but I'd like to call the attention to this error: (EE) AIGLX error: dlopen of /usr/X11R6/lib/modules/dri/i965_dri.so failed (File not found) (EE) AIGLX error: unable to load driver i965 It's present in both two Xorg.0.log you pasted. And now I realize it is in my /var/log/Xorg.log.0 too. Curiously that error doesn't appear when I use startx(1) (in ~/.local/share/xorg/Xorg.0.log). My desktop machine has also a integrated intel graphic card and I don't see that error, neither using startx nor using xenodm. Walter
