Laggy external monitor on a laptop

[geass94]

What do you need?

I do have 4k external monitor hooked up to my laptop. All animations even cursor movement is very laggy, feels 30Hz. I almost never use laptop monitor. So gaving controls in Setup -> Config would be nice to have controls for iGPU and dGPU priorities.

I ended up with solution like this.
Created symlinks for igpu and dgpu like so

SYMLINK_NAME="intel-igpu"
RULE_PATH="/etc/udev/rules.d/intel-igpu-dev-path.rules"
INTEL_IGPU_ID=$(lspci -d ::03xx | grep 'Intel' | cut -f1 -d' ')

sudo tee "$RULE_PATH" > /dev/null <<EOF
KERNEL=="card*", \
KERNELS=="$INTEL_IGPU_ID", \
SUBSYSTEM=="drm", \
SUBSYSTEMS=="pci", \
SYMLINK+="dri/$SYMLINK_NAME"
EOF

and for nvidia

SYMLINK_NAME="nvidia-gpu"
RULE_PATH="/etc/udev/rules.d/nvidia-gpu-dev-path.rules"
NVIDIA_GPU_ID=$(lspci -d ::03xx | grep -i 'NVIDIA' | cut -f1 -d' ')

sudo tee "$RULE_PATH" > /dev/null <<EOF
KERNEL=="card*", \
KERNELS=="$NVIDIA_GPU_ID", \
SUBSYSTEM=="drm", \
SUBSYSTEMS=="pci", \
SYMLINK+="dri/$SYMLINK_NAME"
EOF

in terminal

sudo udevadm control --reload-rules
sudo udevadm trigger

then in hyprland.coonf added line like so

env = AQ_DRM_DEVICES,/dev/dri/nvidia-gpu:/dev/dri/intel-igpu

Now system uses dGPU instead of iGPU and everything works perfectly fine, full 4k resolution with 100Hz (my monitors max) refresh rate on external monitor.

[star-ges]

This works great for me! Thanks for putting the effort in to figure it out.

[pbakiewicz]

Thanks @geass94 for your solution, one problem though I faced is that I got black screen after rebooting. So be careful.

I needed to reboot in safe, terminal only mode, and found out you should use -D parameter to add 0000: prefix which solved the issue for me. Like that:

INTEL_IGPU_ID=$(lspci -Dd ::03xx | grep 'Intel' | cut -f1 -d' ')

I think I should also start an issue to add booting Omarchy in safe mode from Limine just to help people who mess their GPU or hyperland settings.