Hi, i’m trying to Nvidia “Reverse Prime” with a gtx750 + intel hd4000
Displays are attached to the intel connectors.
What i’ve done so far:
Section "Module" Load "modesetting" EndSection Section "Device" Identifier "nvidia" Driver "nvidia" #BusID "" Option "AllowEmptyConfiguration" EndSection
export DISPLAY=:0.0 xrandr --setprovideroutputsource modesetting NVIDIA-0 xrandr --auto openbox --replace & setxkbmap it xset mouse 1.4 4 exec sudo -u koko lxterminal & p1=$! wait $p1
System starts with intel as the primary adapter, nvidia modules are NOT autoloaded.
So i do:
Prime synchronization is working fine:
# cat /sys/module/nvidia_drm/parameters/modeset Y
All is good whitin the X server, and works as expected, but what seems wrong to me is that as i exit the Xorg session, nvidia_drm remains in use.
lsmod | grep nvidia nvidia_drm 45056 1 nvidia_modeset 798720 1 nvidia_drm nvidia 11476992 1 nvidia_modeset drm_kms_helper 126976 2 i915,nvidia_drm drm 299008 7 i915,ttm,nvidia_drm,drm_kms_helper
It took me a while to understand, but there was an open handle to /dev/dri/card1 (nvidia):
# lsof -n | grep "/dev/dri/card/1" systemd 1 root 19u CHR 226,1 0t0 21785 /dev/dri/card1
It prevents me from unloading nvidia_drm and i need to do that to pass the gpu to a libvirt domain.
Manually attach to systemd and closing the handle makes it work, but i cannot do that ugly hacks all of the times.
Note that the open handles i am speaking about increases by on on every xorg restart.
Who is to blame? nvidia driver? Modesetting driver?
nvidia-bug-report.log.gz (181 KB)