Hello. I use Gentoo Linux. On my PC, I use default/linux/amd64/17.1/systemd profile and:
I always use NVIDIA GeForce GTX 960 and 2 monitors connected to this card using 2 DisplayPorts. In UEFI, I always have Intel CPU graphics disabled. So NVIDIA is my the only graphics card. In my initramfs, I have the following /etc/modprobe.d/xxx.conf:
options nvidia_drm modeset=1
In my lightdm.conf, I have:
In my /etc/do_setup_for_lightdm.sh executable, I have:
xrandr --output DP-4 --off
xdotool mousemove 1280 600
I tried x11-drivers/nvidia-drivers-390.25 with sys-kernel/gentoo-sources-4.14.22 and all worked properly (as usual).
But when I switched to sys-kernel/gentoo-sources-4.15.7-r1, I faced an issue. System started, showed the Plymouth logo, then displayed systemd agetty greeting (as usual), then tried to launch lightdm. But lightdm did not start. I faced system hang. Keyboard didn’t work. Then I connected to my PC from my notebook via ssh and obtained dmesg.txt (see attachment). I tried to run “sync && systemctl reboot” but my PC did not reboot for some reason. I had to reboot it manually using reset button. After that, I rebooted to my 4.14.22 kernel, performed fsck.ext4, fixed some errors, launched Gentoo Linux on PC and executed “journalctl -a -b -1” (see attachment).
All the attachments can be found here: https://bugs.gentoo.org/649298