In order to boot, I need to set acpi=off when I use 4.4.8, which solves the
external monitor issue. However, I am not able to shut down my computer
without pressing the physical button. Any ideas?

On Thu, May 5, 2016 at 1:22 AM, Ethan <email address hidden> wrote:

> Kernel 4.4.8  solved my issues completely! I can plug any monitor before
> or after boot using DP or HDMI. I also have multiple window managers
> working flawlessly.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1559308
>
> Title:
>   Plugging HDMI screen in causes system hang
>
> Status in linux package in Ubuntu:
>   Fix Committed
>
> Bug description:
>   I have a 4K UHD laptop screen and am running Ubuntu Gnome 16.04 Beta1
>   using 4.4.0-13-generic and the Nouveau drivers.
>
>   If I plug in an external HDMI monitor (FHD) either into either HDMI
>   port (there's one on the machine and there's one available via a usb
>   3.1 extra adaptor) then the whole system hangs, completely
>   unresponsive and needing a hard reboot. Before hanging the 2nd display
>   gets an image as expected, but the laptop's screen flashes randomly,
>   sometimes you see weird artifacts. Then the hang comes.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 16.04
>   Package: xserver-xorg 1:7.7+13ubuntu3
>   ProcVersionSignature: Ubuntu 4.4.0-13.29-generic 4.4.5
>   Uname: Linux 4.4.0-13-generic x86_64
>   ApportVersion: 2.20-0ubuntu3
>   Architecture: amd64
>   CompizPlugins: No value set for
> `/apps/compiz-1/general/screen0/options/active_plugins'
>   CompositorRunning: None
>   CurrentDesktop: GNOME
>   Date: Fri Mar 18 20:43:42 2016
>   DistUpgraded: Fresh install
>   DistroCodename: xenial
>   DistroVariant: ubuntu
>   ExtraDebuggingInterest: Yes, if not too technical
>   GraphicsCard:
>    Intel Corporation Skylake Integrated Graphics [8086:191b] (rev 06)
> (prog-if 00 [VGA controller])
>      Subsystem: Dell Skylake Integrated Graphics [1028:06e4]
>      Subsystem: Dell GM107M [GeForce GTX 960M] [1028:06e4]
>   InstallationDate: Installed on 2016-03-15 (3 days ago)
>   InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64
> (20160225.1)
>   Lsusb:
>    Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>    Bus 001 Device 003: ID 04f3:21d5 Elan Microelectronics Corp.
>    Bus 001 Device 002: ID 0a5c:6410 Broadcom Corp.
>    Bus 001 Device 004: ID 0c45:6713 Microdia
>    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>   MachineType: Dell Inc. XPS 15 9550
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-13-generic.efi.signed
> root=UUID=b026feed-8801-44f4-9f3f-c245f4a1f25e ro quiet splash vt.handoff=7
>   SourcePackage: xorg
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 01/25/2016
>   dmi.bios.vendor: Dell Inc.
>   dmi.bios.version: 01.01.19
>   dmi.board.name: 0N7TVV
>   dmi.board.vendor: Dell Inc.
>   dmi.board.version: A00
>   dmi.chassis.type: 9
>   dmi.chassis.vendor: Dell Inc.
>   dmi.modalias:
> dmi:bvnDellInc.:bvr01.01.19:bd01/25/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA00:cvnDellInc.:ct9:cvr:
>   dmi.product.name: XPS 15 9550
>   dmi.sys.vendor: Dell Inc.
>   version.compiz: compiz N/A
>   version.ia32-libs: ia32-libs N/A
>   version.libdrm2: libdrm2 2.4.67-1
>   version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu1
>   version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
>   version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu1
>   version.xserver-xorg-core: xserver-xorg-core 2:1.18.1-1ubuntu4
>   version.xserver-xorg-input-evdev: xserver-xorg-input-evdev
> 1:2.10.1-1ubuntu2
>   version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1ubuntu2
>   version.xserver-xorg-video-intel: xserver-xorg-video-intel
> 2:2.99.917+git20160218-1ubuntu3
>   version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
> 1:1.0.12-1build2
>   xserver.bootTime: Fri Mar 18 17:28:07 2016
>   xserver.configfile: default
>   xserver.errors:
>    Failed to load module "nvidia" (module does not exist, 0)
>    Failed to load module "nvidia" (module does not exist, 0)
>    Unknown chipset: NV117
>    SynPS/2 Synaptics TouchPad: Read error 19
>   xserver.logfile: /var/log/Xorg.0.log
>   xserver.outputs:
>    product id                                5182
>    vendor                                     SHP
>   xserver.version: 2:1.18.1-1ubuntu4
>
> To manage notifications about this bug go to:
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>



-- 
Jonas Ng