Jonathan Kamens, to see if this is already resolved, could you please test http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?
** Tags removed: bios-outdated-r01-a2 ** Tags added: latest-bios-r01-a4 ** Description changed: I just bought a new Acer Predator AG6-710, which supposedly comes with a NVIDIA GeForce GTX 980 graphics controller. It has four output plugs -- DVI, two mini DisplayPort, and HDMI. When I have only one monitor plugged in, on the DVI port using DVI-A, i.e., through a DVI-A -> VGA adapter and then a VGA cable, Ubuntu boots up just fine. However, when I have two monitors plugged in, the first as described above and the second through one of the DisplayPorts via a mini DisplayPort to DVI-I adapter and a DVI-A cable, the X server hangs on boot, and I end up with two blank screens and monitors claiming no signal is being sent. I've attached the Xorg log file when this happens. It happens every single time I boot, i.e., it is reliable. - Any additional debugging information I can provide or debugging steps I - can take, please ask, I will gladly help. + WORKAROUND: Use nvidia-352. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: xserver-xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6 Uname: Linux 4.2.0-25-generic x86_64 .tmp.unity.support.test.1: - + ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Wed Jan 20 07:13:46 2016 DistUpgraded: Fresh install DistroCodename: wily DistroVariant: ubuntu DkmsStatus: - virtualbox, 5.0.10, 4.2.0-23-generic, x86_64: installed - virtualbox, 5.0.10, 4.2.0-25-generic, x86_64: installed + virtualbox, 5.0.10, 4.2.0-23-generic, x86_64: installed + virtualbox, 5.0.10, 4.2.0-25-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: - NVIDIA Corporation GM204 [GeForce GTX 970] [10de:13c2] (rev a1) (prog-if 00 [VGA controller]) - Subsystem: Device [196e:1131] + NVIDIA Corporation GM204 [GeForce GTX 970] [10de:13c2] (rev a1) (prog-if 00 [VGA controller]) + Subsystem: Device [196e:1131] InstallationDate: Installed on 2016-01-16 (4 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Acer Predator G6-710 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-25-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 Renderer: Software SourcePackage: xorg UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/21/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: R01-A1 dmi.board.name: Predator G6-710 dmi.board.vendor: Acer dmi.chassis.type: 3 dmi.chassis.vendor: Acer dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR01-A1:bd09/21/2015:svnAcer:pnPredatorG6-710:pvr:rvnAcer:rnPredatorG6-710:rvr:cvnAcer:ct3:cvr: dmi.product.name: Predator G6-710 dmi.sys.vendor: Acer version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4 version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3 xserver.bootTime: Wed Jan 20 06:50:52 2016 xserver.configfile: default xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.17.2-1ubuntu9.1 xserver.video_driver: modeset ** Changed in: xorg (Ubuntu) Importance: Low => Medium ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1536165 Title: X server hangs on start when DisplayPort is connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1536165/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs