DuaneNielsen

Niri Session Setup on Ubuntu 24.04

Guide to getting niri working properly as a session manager with screen recording support.

Prerequisites

sudo apt install pipewire wireplumber xdg-desktop-portal xdg-desktop-portal-gnome xdg-desktop-portal-gtk

DuaneNielsen

# Fixing Waybar Not Starting with Niri Compositor

## Problem

Waybar fails to start when launched by niri, with errors like:

```
Error calling StartServiceByName for org.freedesktop.portal.Desktop: Failed to activate service 'org.freedesktop.portal.Desktop': timed out
```

DuaneNielsen

Spotify Toggle Setup for Niri + Waybar

A clean Spotify integration for niri that gives you a floating, toggle-able Spotify window controlled from waybar.

Features

• Click "Spotify" in waybar to show/hide the window
• Spotify opens as a floating window in the top-right corner
• Window remembers its position if you drag it
• Track info shows in waybar with play/pause, next, previous controls

DuaneNielsen

function convertToDropdowns() {
  // Get the selected range
  var range = SpreadsheetApp.getActiveRange();
  var values = range.getValues();
  
  // Loop through each cell in the selection
  for (var i = 0; i < values.length; i++) {
    for (var j = 0; j < values[i].length; j++) {
      var cellValue = values[i][j];
      

DuaneNielsen

import jax
import numpy as np
import matplotlib.pyplot as plt
import mujoco
from mujoco import mjx

import mediapy as media
from math import sin, cos
from tqdm import trange

DuaneNielsen

import gymnax
import flax.linen as nn
from argparse import ArgumentParser
import functools
from typing import Any, Callable, Sequence, Tuple, Optional, Sequence, Dict, Union, Iterable
import mctx
import warnings
from typing import Tuple, Optional, Union
import jax
import jax.numpy as jnp

DuaneNielsen

from typing import Optional

import torch
from torch import tensor
from tensordict import TensorDict
from torchrl.data import CompositeSpec, BoundedTensorSpec, UnboundedContinuousTensorSpec, UnboundedDiscreteTensorSpec, DiscreteTensorSpec, \
    UnboundedContinuousTensorSpec
from torchrl.envs import (
    EnvBase,
    Transform,

DuaneNielsen

import torch
import torch.nn.functional as F
import pytorch_lightning as pl
from pytorch_lightning.callbacks import ModelCheckpoint, LearningRateMonitor, EarlyStopping
from pytorch_lightning.plugins import DDPPlugin
from pl_bolts.datamodules import MNISTDataModule


class LightningMNISTClassifier(pl.LightningModule):

DuaneNielsen

import torch
import torch.nn.functional as F
import torch.nn as nn
from torch.autograd import Function
from matplotlib import pyplot as plt
from torchvision.io import read_image

inf = float('inf')

DuaneNielsen

mujoco in ~/.mujoco/mujoco200 (may need to rename)
ln -s ~/.mujoco/mujoco200 ~/.mujoco/mujoco200_linux
mujuco key in ~/.mujoco/mjkey.txt
sudo apt install libosmesa6-dev libgl1-mesa-glx libglfw3
sudo apt-get install libglew-dev
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/duane/.mujoco/mujoco200/bin
export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGLEW.so