I was having the same issue on Ubuntu 24.04 on a 2024 XPS 13 (9340) with Ultra 
7. Downgrading to an older kernel seems to fix the screen tearing / system 
freezing. In case it's helpful for someone, you can downgrade the kernel with 
the following steps:
1. Open a terminal and type: sudo apt install linux-image-6.8.0-36-generic
2. Then restart your computer, can just type: reboot
3. During startup press ESC to enter the GRUB menu
4. Select: Advanced Options for Ubuntu
5. Select the kernel you installed in step one (not recovery mode)

Unfortunately now my wifi isn't working. Looking forward to a fix, thank
you for working on this!

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https://bugs.launchpad.net/bugs/2072973

Title:
  Primary screen goes crazy since Ubuntu 24.04 update (6.8 fails but 6.5
  works)

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