Experiencing Lockups on Ubuntu with Ultra i7 – Need Help!

I’m similar; my machine's currently off, but I'm planning to run some diagnostics as soon as it's back up. I was facing these issues when transferring files over the network, so I’ll check on the NIC and driver settings.

You might be facing a NIC driver or power management problem rather than an issue with Ubuntu itself. First, identify your NIC with the command `lspci | grep -i ethernet`.

If it’s an Intel i225 or i226, try disabling power saving features by modifying the GRUB settings. You can also check your logs after a freeze for any clues. Also, ensure you perform a RAM stability test; issues with XMP can sometimes cause lockups when the system is under load.

It sounds like you're dealing with some common issues with the interim release of Ubuntu. First off, if you're using it as a Plex server, I would strongly suggest switching to Ubuntu 24.04 LTS for better stability and support. Here are a few things you can try:

1. **Kernel Issues**: If you're using an early 6.x kernel, updating to the latest version might help.

2. **Network Driver**: Check for errors in your network logs to see if the driver is the problem. Sometimes, switching to a newer Realtek driver can solve connection issues.

3. **Power Management**: Lockups during heavy loads can be linked to aggressive power settings. Try adjusting the BIOS settings related to power management.

4. **Plex Transcoding**: Ensure your hardware transcoding is configured correctly. Overheating could also be a factor.

5. **Logs**: Check your boot logs after a freeze; they can provide insights into what went wrong.

For a headless setup, stick with the LTS version for fewer headaches!