intel + nvidia X11 PRIME Sync

TheRobotFox · 2024-01-19 15:19:26

Hi,
After installing a second NVME SSD yesterday i noticed that my second monitor (connected to intel APU) lags, whenever it updates and pulls my GPU (NVIDIA GTX 1080TI) to 100% usage.
My primary Monitor (connected to the GPU) doesn't have that issue.
There has been a driver update since, but i didn't fix the Problem.
I've actually found, that manually activating PRIME Synchronization completely fixes the issue:

$ xrandr --output DP-1-4 --set "PRIME Synchronization" 1

But putting it into my ".xinitrc" does not do anything, so there seems to be a issue on a deeper level here.
I don't know where to look i have(always had) a minimal X11 config so that shouldn't be a problem right

Section "InputClass"
	Identifier "system-keyboard"
	MatchIsKeyboard "on"
	#Option "XkbLayout" "de"
	Option "XkbVariant" "altgr-intl"
EndSection

 Section "Device"
         Identifier "nvidia"
	 #MatchDriver "nvidia-drm"
         Driver "nvidia"
 EndSection

Section "Device"
        Identifier "intel"
        Driver "modesetting"
        BusID "PCI:0:2:0"
EndSection

[new@ArchLinux X11]$ lspci
00:00.0 Host bridge: Intel Corporation 8th/9th Gen Core 8-core Desktop Processor Host Bridge/DRAM Registers [Coffee Lake S] (rev 0a)
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 0a)
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630]
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI Controller (rev 10)
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #17 (rev f0)
00:1b.4 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #21 (rev f0)
00:1c.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #1 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #9 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Z390 Chipset LPC/eSPI Controller (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-V (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GP102 HDMI Audio Controller (rev a1)
03:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
05:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983

Here is my ".xinitrc"

#!/bin/sh

userresources=$HOME/.Xresources
usermodmap=$HOME/.Xmodmap
sysresources=/etc/X11/xinit/.Xresources
sysmodmap=/etc/X11/xinit/.Xmodmap

# merge in defaults and keymaps

if [ -f $sysresources ]; then

    xrdb -merge $sysresources

fi

if [ -f $sysmodmap ]; then
    xmodmap $sysmodmap
fi

if [ -f "$userresources" ]; then



    xrdb -merge "$userresources"

fi

if [ -f "$usermodmap" ]; then
    xmodmap "$usermodmap"
fi

# start some nice programs

if [ -d /etc/X11/xinit/xinitrc.d ] ; then
 for f in /etc/X11/xinit/xinitrc.d/?*.sh ; do
  [ -x "$f" ] && . "$f"
 done
 unset f
fi


# configure Moniors
xrandr --output DP-1-4 --auto --right-of DP-2  --set "PRIME Synchronization" 1

nitrogen --restore
udiskie &
#picom &
i3

Also my "Xorg.0.log"
https://pastebin.com/WLkgmQEc

I'd be really grateful for any advise!
Thank you in advance,
Tomke

cgb_spender · 2024-01-20 20:58:52

Hi, are you sure that the issue is caused by the new SSD? Did you try removing it? Perhaps the issue was caused by an update? You could try a different video driver for NVidia, e.g., nouveau, and you can try different Arch kernels and fallback versions.

TheRobotFox · 2024-01-22 12:58:46

I still don't understand, why i have to now, but executing

xrandr --output DP-1-4 --set "PRIME Synchronization" 1

in my "i3/config" seems to work (also when waking from suspense).
Not happy with this incident, but this workaround does it's job.

seth · 2024-01-22 14:56:41

[  4282.189] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[  4282.190] (II) Module glx: vendor="X.Org Foundation"
[  4282.267] (II) Loading sub module "glxserver_nvidia"
[  4282.267] (II) LoadModule: "glxserver_nvidia"
[  4282.267] (WW) Warning, couldn't open module glxserver_nvidia
[  4282.268] (EE) NVIDIA: Failed to load module "glxserver_nvidia" (module does not exist, 0)
[  4282.268] (EE) NVIDIA(0): Failed to initialize the GLX module; please check in your X
[  4282.268] (EE) NVIDIA(0):     log file that the GLX module has been loaded in your X
[  4282.268] (EE) NVIDIA(0):     server, and that the module is the NVIDIA GLX module.  If
[  4282.615] (II) Initializing extension GLX
[  4282.615] (II) AIGLX: Screen 0 is not DRI2 capable
[  4282.629] (II) IGLX: Loaded and initialized swrast
[  4282.629] (II) GLX: Initialized DRISWRAST GL provider for screen 0

This is bad.
The ModulePath would be extended to the nvidia location on a driver match, but that match doesn't happen - the nvidia driver loads because

[  4282.183] (==) Using config file: "/etc/X11/xorg.conf"

(looks like optimus-manager)
Get rid of that, post the update of "pacman -Qkk nvidia-utils" and your complete system journal for the boot:

sudo journalctl -b | curl -F 'file=@-' 0x0.st

Might just be a race condition where the X11 server starts before the nvidia GPU is ready because you don't have the modules in the initramfs?

Arch Linux

#1 2024-01-19 15:19:26

intel + nvidia X11 PRIME Sync

#2 2024-01-20 20:58:52

Re: intel + nvidia X11 PRIME Sync

#3 2024-01-22 12:58:46

Re: intel + nvidia X11 PRIME Sync

#4 2024-01-22 14:56:41

Re: intel + nvidia X11 PRIME Sync

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