## NOTE: You can use **console** code block to render on websites such as Github.
# 1. Set example pre-prompt text with a leading newline ($'\n') for spacing
export PS4=$'\n(base) sglbl@pc:~$ '
# 2. Turn on trace mode
set -x
# Get system info
fastfetch --logo none
# Displays a concise system overview including OS, kernel, uptime, CPU, GPU, RAM, and other hardware/software info.
# Get NVIDIA info
nvidia-smi
# Shows NVIDIA GPU status, driver version, memory usage, running processes, and other GPU-related metrics.
# Query current PRIME GPU
prime-select query
# Displays which GPU is currently active (e.g., Intel or NVIDIA) on hybrid graphics systems.
# Check kernel messages related to NVIDIA
sudo dmesg | grep -i nvidia
# Filters kernel ring buffer for messages related to NVIDIA drivers, useful for debugging driver or GPU initialization issues.
# Check kernel messages related to DRM (Direct Rendering Manager)
sudo dmesg | grep -i drm
# Filters kernel logs for DRM-related messages, often used for graphics/display debugging.
# Recent thermal daemon logs
sudo journalctl -u thermald | tail -n 50
# Shows the last 50 log lines from the thermald service, which monitors CPU/GPU temperature and thermal throttling.
# Out of memory (OOM) events in previous boot
journalctl -b -1 | grep -i "oom"
# Searches the previous boot logs for OOM (Out of Memory) events to identify processes killed due to memory exhaustion.
# System logs in a specific time range
sudo journalctl --since "1 hour ago"
# Retrieves all system journal logs between the specified times, useful for debugging incidents during a time window.
## JOURNAL DETAILS
# GDM (GNOME Display Manager) logs from previous boot
journalctl -b -1 -u gdm
# Shows logs related to the GDM service in the previous boot, useful for login/display issues.
sudo journalctl --boot=-1 --priority=3
# Xorg logs filtered for errors
sudo journalctl -b _COMM=Xorg | grep EE
# Shows only error messages (EE) from Xorg logs for the current boot, helps diagnose display server issues.
# Full Xorg logs for current boot
sudo journalctl -b _COMM=Xorg
# Displays all Xorg logs from the current boot, including info, warnings, and errors for detailed graphics troubleshooting.
# Sensors output
sudo sensors
# Shows real-time temperature, voltage, and fan speed readings from hardware sensors.
Downgrading from Linux Kerel Kernel: Linux 6.14.0-36-generic& Nvidia Driver 580
Warning: Do not run these commands blindly via a remote script (like SSH) if you are not physically there, because if the boot fails, they will be stuck.
First, ensure the stable kernel exists on their machine.
sudo apt update
sudo apt install linux-image-6.14.0-33-generic linux-headers-6.14.0-33-generic
(Note: If their Ubuntu version is different, e.g., standard 24.04, the stable kernel might be 6.8.0-xx. Check apt search linux-image-generic to find their stable version.)
Remove the bleeding-edge driver that crashes.
sudo apt purge ~nnvidia
sudo apt autoremove
Install the driver that we know works.
sudo apt install nvidia-driver-535
You cannot delete the kernel you are currently using. You must reboot into the new one first.