Phew! Just done all 48 of these tests... Tests:
1. GDM starts 2. Lightdm starts 3. Can launch Gnome 4. Can launch Gnome Classic 5. External monitor with Lightdm 6. External monitor with Gdm 7. External monitor with Gnome 8. External monitor with Gnome Classic Results: . is fine, E is error (caused hang), F is fail but not hang. S is skipped, e.g. couldn't get to that test. Variables: - graphics driver - prime select, one of: - intel (530 Skylake GT2) - NVIDIA Corporation GM107M [GeForce GTX 960M] Results --------------------------------------------------- Config Driver Prime 12345678 --------------------------------------------------- c1 361.42-0ubuntu2 intel ....EF*F c2 361.42-0ubuntu2 nvidia F....FFF c3 361.42-0ubuntu0~gpu16.04.1 intel ....FFEE c4 361.42-0ubuntu0~gpu16.04.1 nvidia F....FFF c5 364.19-0ubuntu0~gpu16.04.1 intel .....FEE c6 364.19-0ubuntu0~gpu16.04.1 nvidia F.FF?SSS --------------------------------------------------- ## Config 1 ## - 7:* Probably an E. I had it as a pass because when one monitor is ON it works, but having done the other tests I realised that the hang comes when two are turned on at once, which was not something I tested here. - 5:E With monitor plugged in, working under Gnome, logging out to LightDm caused hang. Also booting to lightdm with hdmi monitor caused hang. - 6:F. gdm goes blinky on laptop, unusable with external screen plugged in. See note below, seems to be the same problem: can't do two screens at once. Unplugging restores a working laptop screen. - 8:F on test 8 first plugin of monitor caused blank screens. Unplug, replug gave an image on the external, laptop turned off. Nb. I had the 'Displays' config ui up the 2nd time I plugged in, not sure if this makes any difference. This is working. But trying to turn them both on at once resulted in a flashing unusable display on the laptop ## Config 2 ## - 1:F gdm gives completely black screen. Can swap to tty, system not dead. - 7:F both screens blank, laptop one twitches a bit. Removing cable brought back system. - 8:F as 7:F, but when unplugged needed to swap to tty and back to get functioning mouse/interface. - 6:F as for 1:F ## Config 3 ## - 5:F lightdm goes all black/flickery when external monitor plugged in. Recoverable, though. - 6:F gdm like lightdm when external monitor plugged in. - 7:E, 8:E **gnome works on one screen**, but selecting both on causes a complete hang. ## Config 4 ## - 1:F black screen. Pressing power button does cause normal shutdown - 7:F both go black. Recovered after unplug. - 8:F as 7:F ## Config 5 ## - 6:F flashy screen, mostly blank. Removing cable (quickly) brought stability. - 7:E, 8:E ext. monitor works but hang if 2 displays at once. ## Config 6 ## Was all the same. ## Conclusions ## - GDM: intel only across the three drivers. - Gnome/Gnome classic behave the same. - Two monitors: - both on: you just can't have it with gnome. (lightdm works, and previously I had Unity working, too) - one on: works with intel, not nvidia. ** Attachment added: "syslog and Xorg.* logs" https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1559576/+attachment/4650172/+files/syslog.tgz -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1559576 Title: Ubuntu GNOME boots to black screen when using proprietary Nvidia drivers on a laptop with Optimus Status in gdm: New Status in Ubuntu GNOME: New Status in gdm3 package in Ubuntu: Triaged Status in linux package in Ubuntu: Invalid Status in gdm3 source package in Xenial: Triaged Status in linux source package in Xenial: Invalid Bug description: Using latest Ubuntu Gnome x64 daily build with all updates installed. Lenovo Z70-80 laptop with Nvidia 840M, BIOS updated to latest version, secure boot and other potentially problematic BIOS settings disabled. Can only see a black screen instead of a log-in screen after boot completes when proprietary Nvidia drivers are installed. Regular Ubuntu works absolutely fine on the same machine with the same driver version. Attempting to use older drivers on Ubuntu Gnome made no difference. Bug is affecting more than just me. We were talking about workarounds in ubuntuforums. User fthx claims that switching to lightdm fixes the issue http://ubuntuforums.org/showthread.php?t=2317628&p=13457703#post13457703 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-14-generic 4.4.0-14.30 ProcVersionSignature: Ubuntu 4.4.0-14.30-generic 4.4.5 Uname: Linux 4.4.0-14-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20-0ubuntu3 Architecture: amd64 Date: Sat Mar 19 23:19:21 2016 HibernationDevice: RESUME=UUID=4f8fb76c-f99d-4c54-8a67-eed0653d8eb6 InstallationDate: Installed on 2016-03-19 (0 days ago) InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160318) MachineType: LENOVO 80FG ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-14-generic.efi.signed root=UUID=572a19f6-7324-4269-ad36-7ffc9919f7a2 ro noprompt persistent quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-14-generic N/A linux-backports-modules-4.4.0-14-generic N/A linux-firmware 1.156 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/22/2015 dmi.bios.vendor: LENOVO dmi.bios.version: ABCN96WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: Lenovo Z70-80 dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Z70-80 dmi.modalias: dmi:bvnLENOVO:bvrABCN96WW:bd09/22/2015:svnLENOVO:pn80FG:pvrLenovoZ70-80:rvnLENOVO:rnLenovoZ70-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoZ70-80: dmi.product.name: 80FG dmi.product.version: Lenovo Z70-80 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/gdm/+bug/1559576/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp