I just found some interresting variant when pluggin a VGA screen to the DB15 at the same time.
If you plug a screen of the DB15 external port and set option to "modeset=0", you will get the full 1024x768 screen as mirror on both LVDS and VGA screens (default screen with 1024x768 76.0 ). A quick tests summary of all the additional tests I've done : No kernel options --> Black screen on LVDS but 1920x1080 on DB15 modeset=1 --> 1024x768 on LVDS black on DB15 modeset=1 video=inteldrmfb:mode=1024x768 --> Black screen on LVDS but 1920x1080 on DB15 "" (empty param) --> same result as previous test modeset=0 (case described earlier)-> 1024x768 on both screens in mirror mode -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1493997 Title: Resolution max at 640x440 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1493997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
