In the case of the reported ASUS laptop it could be a problem related to the BIOS version, but not in my case. And truely not in the case of a lot of other users. Simply make a google search with "nvidia prime ubuntu black screen" and filter by date "last month". You will find tenth of results with people discussing about this problem. E.g.: - https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1362848 It seems that one solution is to enforce "sleep and wake-up" of display after switching to nvidia. Other people are still mentioning the switch to modesetting and deactivation of gpu-manager. Another solution seems to point out switching to gdm, which ends up in avoiding the "sleep/wake-up" problem related to light-dm. I'm very disappointed that this bug report is handled like an individual problem. A lot of people have this problem and the workarounds are really nasty. It's an important feature for every user owning a laptop with an discrete nvidia card, because on one hand it's reducing the power consumption drastically and on the other hand enabling the full potential of a discrete card.
-- 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/1449560 Title: Cannot login with Nvidia Optimus hardware installed(Ubuntu 15.04) Status in xorg package in Ubuntu: Incomplete Bug description: I have Nvidia Optimus GT415M hardware on my laptop. I've upgraded my Ubuntu 14.10 where everything was working fine with Nvidia Optimus to Ubuntu 15.04 and now I cannot login. After I type the password login screen comes back again. I did complete reinstall of NVidia packages and installed new nvidia-346 package from Ubuntu repo. Looking at Xorg.0.log I see this message: [ 120.353] (EE) intel(G1): [drm] failed to set drm interface version: Permission denied [13]. [ 120.353] (II) intel(G1): [drm] Contents of '/sys/kernel/debug/dri/0/clients': [ 120.353] (II) intel(G1): [drm] a dev pid uid magic [ 120.354] (II) intel(G1): [drm] [ 120.354] (II) intel(G1): [drm] y 0 2996 0 0 [ 120.354] (II) intel(G1): [drm] y 0 2996 0 0 [ 120.354] (EE) intel(G1): Failed to claim DRM device. And I have found thread regarding this problem on https://devtalk.nvidia.com/default/topic/816599/prime-switching-to- nvidia-creates-black-screen/. So looks like hardware similar to mine need a new version of xserver-xorg-video-intel. Could you please help with this. --- .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 346.59 Tue Mar 31 14:10:31 PDT 2015 GCC version: gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu13) ApportVersion: 2.17.2-0ubuntu1.5 Architecture: amd64 CurrentDesktop: KDE DistUpgraded: Fresh install DistroCodename: vivid DistroRelease: Ubuntu 15.04 DistroVariant: kubuntu GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 18) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:15a2] NVIDIA Corporation GF108M [GeForce GT 415M] [10de:0dee] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:15a2] InstallationDate: Installed on 2011-07-25 (1525 days ago) InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) MachineType: ASUSTeK Computer Inc. N53Jg NonfreeKernelModules: nvidia Package: xorg 1:7.7+7ubuntu4 PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-28-generic root=UUID=ba2dd780-4798-4649-9a3c-77ff94804d1d ro splash quiet i915.semaphores=1 ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5 Tags: vivid possible-manual-nvidia-install kubuntu Uname: Linux 3.19.0-28-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm admin cdrom dialout lpadmin netdev plugdev sambashare _MarkForUpload: True dmi.bios.date: 10/14/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N53Jg.206 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N53Jg dmi.board.vendor: ASUSTeK Computer Inc. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK Computer Inc. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN53Jg.206:bd10/14/2010:svnASUSTeKComputerInc.:pnN53Jg:pvr1.0:rvnASUSTeKComputerInc.:rnN53Jg:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0: dmi.product.name: N53Jg dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK Computer Inc. version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2 version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Mon Sep 28 10:27:30 2015 xserver.configfile: /etc/X11/xorg.conf xserver.errors: intel(G1): [drm] failed to set drm interface version: Permission denied [13]. intel(G1): Failed to claim DRM device. xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 8940 vendor AUO xserver.version: 2:1.17.1-0ubuntu3.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1449560/+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