Public bug reported:

Recently started experiencing issue where prime-select wont activate the
intel card. Hard to pinpoint when this changed occured, as I usually use
the intel card, and switching requires a reboot (the machine hangs if I
do a simple logout/login or "systemctl restart lightdm.service").


dave@dave-mate:~$ sudo prime-select nvidia
Info: the current GL alternatives in use are: ['nvidia-384-prime', 
'nvidia-384-prime']
Info: the current EGL alternatives in use are: ['nvidia-384-prime', 
'nvidia-384-prime']
Info: selecting nvidia-384 for the nvidia profile
update-alternatives: using /usr/lib/nvidia-384/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-384/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-384/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-384/alt_ld.so.conf to provide 
/etc/ld.so.conf.d/i386-linux-gnu_EGL.conf (i386-linux-gnu_egl_conf) in manual 
mode


dave@dave-mate:~$ sudo prime-select intel
Info: the current GL alternatives in use are: ['nvidia-384', 'nvidia-384']
Info: the current EGL alternatives in use are: ['nvidia-384', 'nvidia-384']
Info: selecting nvidia-384-prime for the intel profile
update-alternatives: using /usr/lib/nvidia-384-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-384-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-384-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-384-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


dave@dave-mate:~$ lsb_release -rd
Description:    Ubuntu 16.04.4 LTS
Release:        16.04


dave@dave-mate:~$ apt-cache policy nvidia-384
nvidia-384:
  Installed: 384.130-0ubuntu0.16.04.1
  Candidate: 384.130-0ubuntu0.16.04.1
  Version table:
 *** 384.130-0ubuntu0.16.04.1 500
        500 http://pg.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 
Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 
Packages
        100 /var/lib/dpkg/status

** Affects: nvidia-graphics-drivers-384 (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "Using the NVIDIA GUI, this message appears."
   
https://bugs.launchpad.net/bugs/1774900/+attachment/5148359/+files/Screenshot%20at%202018-06-04%2009-27-38.png

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https://bugs.launchpad.net/bugs/1774900

Title:
  prime-select wont select intel chip

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