You should always post a link to any prior help request you’ve made, if your current help request is directly related to an old one.
Your old thread:
As before, I have moved this thread to the Networking sub-fora where it belongs. Please post any networking help requests in the “Networking” sub-forum in the future.
I have no idea why your system would freeze when doing a backup using Gnome/Pika. I have been a KDE user for 20+ years, I have next to no experience using Gnome. I would suggest you investigate this error:
As far as your wireless issue goes, I would have to fall back to what I stated on your last thread. When Realtek WiFi drivers break, the usual fix is to switch to using the lts kernel. At some point in the future the mainline or Linux kernels should resume working with your Realtek WiFi driver.
I gave you a lot of suggestions on my post that you marked as your fix on your last wifi thread. You did not really report on which suggestions of mine you implemented on that thread that contributed to your fix.
You would need to provide the terminal output of any/all changes you made to any grub or network configuration file(s) via the cat command so that we can view your current configuration.
You need to test your WiFi driver on the lts kernel (again), making sure you implemented the fixes correctly that I listed on your last WiFi help request. You also need to test the mainline kernel. For the best chance of getting your WiFi driver working correctly you should test numerous alternate kernels. If you insist on using the zen kernel or another kernel that is currently incompatible with your Realtek WiFi driver, then I would suggest that you probably should buy another WiFi adapter. Look to buy a WiFi adapter that has better in-kernel driver support. Unfortunately, the Realtek WiFi model you are currently using has been problematic in Linux for quite some time.