Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: nvidia-prime (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1749769
Title:
Nvidia-prime after enable PRIME Synchronization non-existent VGA
device will show up in the output of xrandr and in Display manager
Status in nvidia-prime package in Ubuntu:
Confirmed
Bug description:
Systems with Optimus (Intel+NVIDIA GPUs) can have ghost VGA devices
hardcoded in the BIOS. This leads the system into thinking that there
is actually one more active output than there really is.
1) Ubuntu 16.04.3 LTS
2) nvidia-prime 0.8.2
3) When i enable PRIME Synchronization by set option options nvidia_390_drm
modeset from '0' to '1' in /etc/modprobe.d/nvidia-graphics-drivers.conf and
add option to grub nvidia-drm.modeset=1 and after reboot there only one active
output in xrandr --verbose is LVDS.
4) When i enable PRIME Synchronization by set option options
nvidia_390_drm modeset from '0' to '1' in /etc/modprobe.d/nvidia-
graphics-drivers.conf and add option to grub nvidia-drm.modeset=1 and
after reboot and here you go in xrandr --verbose there non-existent
display detected VGA-0 (Ghost screen with wrong resolution 1360x768).
it's same bug as here https://bugs.launchpad.net/ubuntu/+source
/nvidia-prime/+bug/1296020 but on LTS version of ubuntu
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