The monitor doesn't have an EDID nor generate hotplug events. Without the hw detection, we fallback to probing the EDID to determine if a display maybe present. Since that is not, we then guess based on whether we can read any values back from the VGA plane in the display (-> unknown connection status). That is a heavy-weight operation and only performed upon explicit request from userspace, i.e. we do not run that check periodically and synthesize hotplug events. This is an issue where improving your experience is to the detriment of everyone else. Instead, you basically need to manually trigger a probe whenever you plug in your monitor (either through xrandr or the display manager).
** Summary changed: - Laptop with Intel Graphics: external VGA monitor only gets signal on boot (no “hot plugging”) + [expected] VGA monitor only gets signal on boot (no “hot plugging”, no EDID) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/979748 Title: [expected] VGA monitor only gets signal on boot (no “hot plugging”, no EDID) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/979748/+subscriptions _______________________________________________ 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
