ubuntu 22.04

Hello, I am currently running Ubuntu 22.04 and every time I run sudo apt update I get a 404 and 502 error for certain repositories. I tried changing the mirror but that did not solve the problem. Any possible solutions would be appreciated. Thanks in Advance

Hi, I've installed Ubuntu 22.04 on an Intel 12700T (AlderLake) but the screen goes black when switching to the i915 (Intel eGPU) driver. This happens in the 22.04 Desktop setup (which only run in "Safe Graphics" model), It happens when 22.04 Desktop boots normally. It happens in 22.04...

I have recently upgraded to Ubuntu Jammy Jelly Fish, Gnome version 42, excited to see the new accent colour feature. Unfortunately, it wasn't able to show the option to change accent colour. I would highly appreciate it if anybody can help me fix this problem asap.