@Kai-Heng Feng (kaihengfeng) Based on your suggestion I have tested with the below mainline kernels as well as the current 17.04 kernel. http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc1/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc2/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc5/
Short answer: v4.12-rc1 with NOMODESET -> Successfully logged in. v4.12-rc2 with NOMODESET -> Successfully logged in. v4.12-rc5 without NOMODESET-> Successfully logged in. 4.10.0-35-generic with NOMODESET -> Successfully logged in. Though, there have been slight different behaviours observed, which I believe are noteworthy. Long answer: I am using the Dell XPS 15 9560 with a Dell Thunderbolt dock – tb16. The laptop itself is closed and thus only using the external monitor. To turn the laptop on, I use the power button on the docking station. Scenario 1: v4.12-rc1 without NOMODESET -> The external screen eventually shows the login screen background and I can move the mouse. Due to the way the mouse was moving out the display area I then got the impression that it might render the login dialog on the laptop screen instead. This was confirmed by opening my laptop. Scenario 2: v4.12-rc1 with NOMODESET -> The external screen correctly shows the login screen and I can successfully login. Note, kernel v4.12-rc1 and v4.12-rc2 behave identical. Scenario 3: v4.12-rc5 without NOMODESET -> The external screen correctly shows the login screen and I can successfully login. Scenario 4: v4.12-rc5 with NOMODESET -> Eventually shows a black screen. No response to key strokes. Scenario 5: 4.10.0-35-generic without NOMODESET -> The Ubuntu splash screen is displayed (i.e. with the circling progress icon). It never shows the login screen and appears to be stuck in an endless loop. I have observed this for about 10 minute and then turned the computer off. Scenario 6: 4.10.0-35-generic with NOMODESET -> The external screen correctly shows the login screen and I can successfully login. Note, this is the currently latest kernel that ships with Ubuntu 17.04. This is how I currently use Ubuntu 17.04 on Dell XPS 9560. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1697556 Title: Computer freezes after login - 4.10.0-22-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1697556/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
