Can't switch to Nvidia

[s0m3OnE47]

I checked and modified BUS id of nvidia and modified /etc/switch/nvidia and intel accordingly. But when I switch to Nvidia, blank screen appears. Then I have to delete /etc/X11/xorg.conf.d/99-nivida.conf Then startx to start the UI.

output of sudo /etc/switch/gpu_switch_check.sh Trying _SB.PCI0.GFX0._DSM: /etc/switch/gpu_switch_check.sh: line 63: warning: command substitution: ignored null byte in input works!

cat /etc/switch/intel/no-optimus.sh ... echo '_SB.PCI0.GFX0._DSM' > /proc/acpi/call echo -n 1 > '/sys/bus/pci/devices/0000:3c:00.0/remove' ...

(3c:00.0 is the busID of Nvidia)

cat /etc/switch/nvidia/nvidia-xorg.conf ... BusID "0000:3c:0:0" ...

I ran sudo /usr/share/acpi_call/examples/turn_off_gp none of the output showed "works!"

[dglt1]

BusID "0000:3c:0:0"

are you certain this is an optimus laptop? i've never seen one with that bus id before. if it is, the reason that busid wont work is because "3c" converts to "60" and your busid would be 60:0:0

[s0m3OnE47]

Mine is Thinkpad T490 with MX250 GPU. Would making 60:0:0 work?

[bevsxyz]

I am also having trouble with a similar card. It logged into lightdm first time in Nvidia mode. When set to intel I couldn't even enter tty. So I used a live usb to chroot and remove all the conf files related to video. It boots up I set it to Nvidia and reboot, boom blank screen. I could access tty though this time.