After updating to 390.25 , Prime Sync stopped working ( GTX 1050 )

Graphics / Linux Linux
1

I was using it with 384.111 and it worked great however on 390.25 , Prime Sync is not working and tearing is awful.

I was using it with these steps.

sudo xed /etc/modprobe.d/zz-nvidia-modeset.conf

Adding

options nvidia-XXX_drm modeset=1

At that case XXX is 390.

I check if modeset is on with that command

sudo cat /sys/module/nvidia_drm/parameters/modeset

It says ’ Y ’ as yes.

Finding my output with

xrandr

After found it , i added this to system startup

"xrandr --output eDP-1-1 --set 'PRIME Synchronization' '1'"

It was working with these config on 384.11.

When i decided to open a topic about it , i saw this.

Generix said there:

After reboot, you can check if it's working with

    xrandr --prop |grep Sync


Should return
PRIME Synchronization: 1

It returns as both 0 and 1 to me.

xrandr --prop |grep Sync
	PRIME Synchronization: 0 
	PRIME Synchronization: 1
2

In case you’re using kernel 4.15, you’ll need the patches mentioned here
[url]No /sys/class/drm/card0-* entries on kernel 4.15 - Linux - NVIDIA Developer Forums
or downgrade to kernel 4.14

Note: disconnected connectors always show PRIME Synchronization: 1

3

Yes , i also upgraded my kernel to 4.15 because i can turn on and off my keyboard leds with 4.15.

So , how can i apply this patch?

I’m on Mint and i get 4.15 kernel via Ukuu , so that shows my level of experience i guess :D

4

I don’t know if that works, might break the driver. No warranty.

Download the patch, then

cd /usr/src/nvidia-390-390.25/

check if the patch applies doing a dry-run

sudo patch --dry-run -p3 < /<pathto>/<patch>

if no errors occur, apply the patch

sudo patch -p3 < /<pathto>/<patch>

make the kernel modules

sudo make

reboot.

If it fails, reinstall the driver
sudo apt --reinstall install nvidia-390
Edit: you might have to run sudo update-initramfs in case the modules are embedded in initrd.
It’s safer to downgrade to kernel 4.14 and wait for an updated driver, shouldn’t take too long.

5

Then i’ll take the safe path and downgrade to 4.14.

I hope Nvidia can fix it quickly.