Hi there. I'm also having the exact same issue on a Dell Inspiron 15 7559 running Ubuntu 17.04 beta 2, and had the same issue with 16.04 and 16.10.
As long as you just leave it in NVIDIA mode, the laptop runs beautifully... Once "prime-select intel" is invoked and you log out, the system hard locks when trying to load X. Booting in to rescue mode "mount -o rw,remount /" and running "prime- select nvidia" seems to fix it. I just now took a look at the "prime-select" script and am happy to see that it's written in Python since it's a language I'm familiar with. I'll start fartin' around with it and see if I can make some sense of what's going on, otherwise I hope that we can get some traction on fixing this. XD -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-prime in Ubuntu. https://bugs.launchpad.net/bugs/1632035 Title: Nvidia prime intel profile segfaults on login Status in nvidia-prime package in Ubuntu: Confirmed Bug description: when using nvidia profile, everything works fine. After switching to intel profile, with: peter@dell:~$ sudo prime-select intel Info: the current GL alternatives in use are: ['nvidia-370', 'nvidia-370'] Info: the current EGL alternatives in use are: ['nvidia-370', 'nvidia-370'] Info: selecting nvidia-370-prime for the intel profile update-alternatives: using /usr/lib/nvidia-370-prime/ld.so.conf to provide /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf (x86_64-linux-gnu_gl_conf) in manual mode update-alternatives: using /usr/lib/nvidia-370-prime/ld.so.conf to provide /etc/ld.so.conf.d/x86_64-linux-gnu_EGL.conf (x86_64-linux-gnu_egl_conf) in manual mode update-alternatives: using /usr/lib/nvidia-370-prime/alt_ld.so.conf to provide /etc/ld.so.conf.d/i386-linux-gnu_GL.conf (i386-linux-gnu_gl_conf) in manual mode update-alternatives: using /usr/lib/nvidia-370-prime/alt_ld.so.conf to provide /etc/ld.so.conf.d/i386-linux-gnu_EGL.conf (i386-linux-gnu_egl_conf) in manual mode system crashes on next login, with following message in X logs: 42977.276] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e) [0x55812efd1ade] [ 42977.276] (EE) 1: /usr/lib/xorg/Xorg (0x55812ee1f000+0x1b6e69) [0x55812efd5e69] [ 42977.277] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fa62d7c3000+0x354a0) [0x7fa62d7f84a0] [ 42977.277] (EE) 3: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7fa628778000+0xadcbe) [0x7fa628825cbe] [ 42977.277] (EE) 4: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7fa628778000+0x4e25d) [0x7fa6287c625d] [ 42977.277] (EE) 5: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7fa628778000+0x84735) [0x7fa6287fc735] [ 42977.277] (EE) 6: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7fa628778000+0x5a73ae) [0x7fa628d1f3ae] [ 42977.277] (EE) [ 42977.277] (EE) Segmentation fault at address 0x28 peter@dell:~$ lsb_release -rd Description: Ubuntu 16.04.1 LTS Release: 16.04 thank you ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: nvidia-prime 0.8.2 Uname: Linux 4.7.2-040702-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: KDE Date: Mon Oct 10 19:28:33 2016 InstallationDate: Installed on 2016-04-22 (171 days ago) InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) SourcePackage: nvidia-prime UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1632035/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
