** Description changed: It happens intermittently. Some times after a kernel upgrade it boots fine, but immediately after the screensaver turns on the screen gets - black with the backlight on. + black with the backlight on. After a good boot it returns to booting to + a black screen. The system is working while the black screen is on. I am able to log in and shutdown via console (blindly) I have tried to write dmesg to a file while it is in this mode and I got this: [ 1835.947242] cfg80211: (5815000 KHz - 5850000 KHz @ 35000 KHz), (N/A, 3301 mBm), (0 s) [ 1835.947243] cfg80211: (17100000 KHz - 17300000 KHz @ 200000 KHz), (N/A, 2000 mBm), (N/A) [ 1835.947244] cfg80211: (57000000 KHz - 66000000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A) [ 1835.952825] wlp3s0: Limiting TX power to 18 dBm as advertised by 04:da:d2:fd:7d:0e [ 1998.759411] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.770230] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.781095] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.791896] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.802880] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.813780] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.824569] [drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many full retries, give up [ 1998.824747] [drm:intel_dp_start_link_train [i915_bpo]] *ERROR* failed to train DP, aborting This was after a boot failed. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg (not installed) ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm 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 367.35 Mon Jul 11 23:14:21 PDT 2016 - GCC version: gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.1) + NVRM version: NVIDIA UNIX x86_64 Kernel Module 367.35 Mon Jul 11 23:14:21 PDT 2016 + GCC version: gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.1) .tmp.unity_support_test.1: - + 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: Wed Jul 20 11:41:21 2016 DistUpgraded: Fresh install DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: - bbswitch, 0.8, 4.4.0-28-generic, x86_64: installed - bbswitch, 0.8, 4.4.0-31-generic, x86_64: installed - nvidia-367, 367.35, 4.4.0-31-generic, x86_64: installed + bbswitch, 0.8, 4.4.0-28-generic, x86_64: installed + bbswitch, 0.8, 4.4.0-31-generic, x86_64: installed + nvidia-367, 367.35, 4.4.0-31-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: - Intel Corporation Skylake Integrated Graphics [8086:191b] (rev 06) (prog-if 00 [VGA controller]) - Subsystem: CLEVO/KAPOK Computer Skylake Integrated Graphics [1558:1501] - NVIDIA Corporation Device [10de:1667] (rev a1) (prog-if 00 [VGA controller]) - Subsystem: CLEVO/KAPOK Computer Device [1558:1503] + Intel Corporation Skylake Integrated Graphics [8086:191b] (rev 06) (prog-if 00 [VGA controller]) + Subsystem: CLEVO/KAPOK Computer Skylake Integrated Graphics [1558:1501] + NVIDIA Corporation Device [10de:1667] (rev a1) (prog-if 00 [VGA controller]) + Subsystem: CLEVO/KAPOK Computer Device [1558:1503] InstallationDate: Installed on 2016-07-09 (10 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) Lsusb: - Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub - Bus 001 Device 004: ID 1c7a:0603 LighTuning Technology Inc. - Bus 001 Device 003: ID 5986:066d Acer, Inc - Bus 001 Device 002: ID 0cf3:e300 Atheros Communications, Inc. - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 001 Device 004: ID 1c7a:0603 LighTuning Technology Inc. + Bus 001 Device 003: ID 5986:066d Acer, Inc + Bus 001 Device 002: ID 0cf3:e300 Atheros Communications, Inc. + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Notebook N15_N17RF1 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic.efi.signed root=UUID=32802ab4-59f5-434e-a6a4-8ee988bf7e24 ro nomodeset quiet splash vt.handoff=7 Renderer: Software SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.05.02 dmi.board.asset.tag: Tag 12345 dmi.board.name: N15_N17RF1 dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.05.02:bd04/01/2016:svnNotebook:pnN15_N17RF1:pvrNotApplicable:rvnNotebook:rnN15_N17RF1:rvrNotApplicable:cvnNotebook:ct10:cvrN/A: dmi.product.name: N15_N17RF1 dmi.product.version: Not Applicable dmi.sys.vendor: Notebook 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 20 11:23:21 2016 xserver.configfile: default xserver.logfile: /var/log/Xorg.0.log xserver.outputs: - + xserver.version: 2:1.18.3-1ubuntu2.2
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1604742 Title: Black screen when booting without nomodeset To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1604742/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
