This issue affects me too (Ubuntu GNOME 14.04 on a Macbook Pro 11.1). With Ubuntu GNOME 13.10 it didn't.
Hereby attached is a log file with two kind of messages: * [...] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up * [...] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up ** Attachment added: "bug.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1300914/+attachment/4133492/+files/bug.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1300914 Title: External screen undetected after first plug Status in “linux” package in Ubuntu: Confirmed Bug description: On Ubuntu 14.04, the external screen plugged on VGA is detected and get activated correctly. However, if I unplug it and then replug it later, it is not detected anymore and the screen receives no signal. A way to get it back to work is to reboot or simply suspend the computer. Sorry but I have no idea of what package is handling that. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1300914/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
