Okay, I tested the problem more. With upstream kernel, I can get the picture to external display with HDMI if I boot the computer display connected. But this way I can't get picture to internal display, even though Ubuntu display manager recognizes internal display and extends the screen to both of displays (disabling and enabling display doesn't help). If I plug the display after login, it works quite well (still some glitches though, usually I have to disconnect and connect it again to get the output working).
I can't get the external display with HDMI working at all using Precise's kernel linux-image-3.2.0-24-generic. I tried with display connected when booting up the computer or connecting the display when in LightDM login screen, and it will display output on external until I log in to X. I've also tried to connect the display after login, but then both screen go blank. Console and LightDM login screen are displayed nicely on the external and internal display. If needed, I can try to explain the problem more presice and/or test with some other settings... ** Tags removed: kernel-bug-exists-upstream ** Tags added: kernel-fixed-upstream ** Changed in: linux (Ubuntu) Status: Triaged => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/989226 Title: HDMI out doesn't work with ASUS Zenbook UX31E To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/989226/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs