The issue was fixed upstream. The commit that fixed it: http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?h=linux-3.17&id=6fbb702e27d78ad2458df048b58cca3454bc0965
I tried the ubuntu-utopic kernel with the commit on top, and it works fine again. HDMI gives signal again, no more errors in dmesg, and suspend/shutdown also works. Guess this is a must-have! ** Changed in: linux (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1374607 Title: nouveau - HDMI gives no more signal since 3.15 (optimus) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1374607/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs