First, you might try booting an older kernel to see if that runs for you. Your bootloader such as grub might help you pick an old one.
The older kernels are actually combinations of kernel + initial ramdisk that contains the version of your graphics drivers that were being used at that time. It could be a way to test the hypothesis.
Hmm, interesting. That tells us that it's not actually a problem with your graphics driver or kernel version, and given that it was working on this version before, I would think some aspect of Xorg configuration, your graphics hardware has an issue, or your installation in general has been corrupted when it tried to upgrade.
You might try to detect corruption by using a tool like debsums to check for any obviously corrupted files.
What's the state of your debian packages I wonder... does something like apt-get update or apt-get check highlight any problems with the state of installed packages that could point to a failed upgrade?
I think its because / is full. Some packages cant update. Is there a way to combine them without gui as i am disabled and cant use a mouse? I know u cant edit partitions booted
If sudo apt -f install doesn't work properly, you can create an apt-cache folder on, e.g. your home partition, assuming this is the one with sufficient amounts of free storage.
This may seem like an obvious question, but are there files you can remove or perhaps move to another drive or USB stick temporarily to make enough space to get through your updates? You should be able to do those while rootfs is full.
We can certainly delete or copy files using the terminal.
Are you sure the root is full and not readonly due to other errors? Why do you believe root is full?