Hi, please try Linux kernel version 4.4.71, 4.8, 4.9 at [1] so I can know the what exact patch series fixed the issue.
My guess is that backported lspcon feature broke some machine. But since 4.10 works, we need to backport more patches to ours 4.4 Linux. [1] http://kernel.ubuntu.com/~kernel-ppa/mainline -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1686189 Title: External monitor connecting problem on Intel graphics card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686189/+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
