Hello Christopher, here the answers to your questions. I hope it helps.
1) What release did you upgrade from where this problem wasn't reproducible? I was using the 14.04 (stable) beforehand and I can't recall having this problem. Another thing is that I recently switched from a HDMI-DVI to a HDMI-HDMI cable. To my knowledge the problem didn't occur with the HDMI-DVI cable (even the sleep and suspend feature was working without any problems). 2) In the prior working release, were you using the nvidia proprietary drivers? Yes, I was using the nvidia proprietary drivers. 3) If you uninstall the nvidia proprietary drivers does this provide a WORKAROUND? If I'm not to use the proprietary one the issue is even more persistent. Xrandr is showing the second monitor as connected, but even a restart of the lightdm service doesn't help. The monitor always shows "no signal". -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1607212 Title: HDMI connection issue (Ubuntu 16.04 and GeForce GTX 960M) Status in xorg package in Ubuntu: Incomplete Bug description: I'm working with an acer VN7-592G, with an Intel Core i7 Quad-Core- Prozessor and the NVIDIA GeForce GTX 960M. Since the upgrade to Ubuntu 16.04 I have problems with the HDMI connection. If plugged in, the HDMI is recognised (xrandr), but the second monitor shows "no signal". After restarting the lightdm service (sudo service lightdm restart), the second monitor is working in most cases. Sometimes ubuntu freezes after lightdm restart and a hard reset has to be performed. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 361.42 Tue Mar 22 18:10:58 PDT 2016 GCC version: gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.1) .tmp.unity_support_test.0: ApportVersion: 2.20.1-0ubuntu2.1 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: Thu Jul 28 08:13:41 2016 DistUpgraded: 2016-06-05 13:36:30,607 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' 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: Acer Incorporated [ALI] Skylake Integrated Graphics [1025:1039] Subsystem: Acer Incorporated [ALI] GM107M [GeForce GTX 960M] [1025:1039] InstallationDate: Installed on 2015-11-24 (246 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) MachineType: Acer Aspire VN7-592G ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic.efi.signed root=UUID=347e424a-f916-4ca8-a254-caa35281e9c3 ro noprompt persistent quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to xenial on 2016-06-05 (52 days ago) dmi.bios.date: 09/25/2015 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.03 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire VN7-592G dmi.board.vendor: Acer dmi.board.version: V1.03 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.03 dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.03:bd09/25/2015:svnAcer:pnAspireVN7-592G:pvrV1.03:rvnAcer:rnAspireVN7-592G:rvrV1.03:cvnAcer:ct10:cvrV1.03: dmi.product.name: Aspire VN7-592G dmi.product.version: V1.03 dmi.sys.vendor: Acer version.compiz: compiz 1:0.9.12.2+16.04.20160714-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Wed Jul 27 09:13:51 2016 xserver.configfile: /etc/X11/xorg.conf xserver.errors: evdev: Dell Dell USB Wired Entry Keyboard: Unable to open evdev device "/dev/input/event7". xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.18.3-1ubuntu2.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1607212/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
