I have a Nvidia GT710 but linux driver support has been dropped for this card so have ordered an AMD Radeon HD 6450. When it arrives I plan to swap it over do I need to remove the Nvidia Linux drivers, shut down then change the card. Are there any Generic drivers for AMD and how do I remove the Nvidia drivers? I know how to do it in Solus but not Zorin.
All you would want to do is remove anything relating to Nvidia drivers when you get to that point, which I believe should be covered by this commmand:
sudo apt remove --purge '^nvidia-.*'
However hopefully someone can confirm that that won't leave behind any residue as I mainly just deal with AMD cards. As for anything AMD, you shouldn't have to do a single thing to get that AMD card working, once Nvidias stuff is gone, it should just default to what is included by default and work beautifully.
I know, it's hard to believe, but literally you just do nothing and it works. Take that, Apple 
EDIT: I missed a quote.
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That's how I've been removing it in driver experiments and it's worked well, but I think you're missing a closing single quote at the very end of that command line.
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Well I changed the card and the max resolution I could get was 700x480 and I wasnt able to change it in the settings. My monitor is 1600x900 so things are a little big. Any ideas?
See if downloading the Linux driver works:
Nope no change and the login screen is all corrupt.
Have you tried the terminal install?
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I will try that next.
Just also as something that may be worth trying, if you have your live usb of Zorin around (or can create another one) it might be worth the check of what options you have available via that (see if it works on a plain jane dane). I wonder if there's something residual left around that is stopping it from functioning properly.
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Looking at the AMD forum, higher resolutions for this card are a problem as I have found out on Windows 10.
That is not true for legacy cards / older cards . It is an assumption made by way too many linux users.
The HD6450 was released in 2011 and would have been orginally supported by the catalyst drivers.
Amdgpu was released in 2015 and may have had support back then for the 6450. The latest driver ( catalyst ) I could find was from 2015 and will not work today.
Amd no longer supports this card.
I would see if you can return the 6450 and go back to the nvidia 710 for now. As far as I know the 710 is still supported by the nouveau driver and at least you will have a workable resolution but the performance will not be great.
That's actually my bad. I mistakenly skimmed the exact model and presumed it was the more recent 6000 series from AMD, not the older 6000 series.
I genuinely hate when companies do that. I'm taking the blame here, easily, but for the love of god there's other ways instead of using the same number schemes over again.
Sorry, mini rant. I'm not going further into it.
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My apologies, I often come across as blunt when trying to make a point. There is a misconception that linux is truly plug and play and automagically supports everything you throw at it. To make matters worse people trying to navigate linux as a new user often see that on youtube, tech articles, and forums.
No need to blame yourself for an easy mistake. Complicating things even more the recent 6000 series cards had refresh releases ending in the numbers 50. I could easily expand upon your mini rant and I know your frustration. If you want to fry a few brain cells venture into xeon cpu schemes and enterprise products.
I have persistent post concussive syndrome and I have to read posts several times before things click. I can see myself taking the same approach as you and others did in this thread.
Troubleshooting can be like hitting a nail with a hammer. You have posts where you hit the nail right on the head, others where you hit your fingers, and those moments when the hammer leaves your hand and crashes through the window and hits your neighbour. I have had plenty of the last two over the years.
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Two things against the 710 no more driver updates and nouveau has to have nomodeset in the command line or it crashes the OS on boot and nomodeset disables hardware acceleration on that card so sluggish. I have just ordered a Nvidia GT1030 which is still supported by latest drivers so should be good for a few years.
I have started a return on the HD6450. 
Guess what! I took delivery of an Asus HD6450 from another seller after returning the old one and it works fine.
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Caicos [Radeon HD 6450/7450/8450
/ R5 230 OEM] driver: radeon v: kernel
Display: x11 server: X.Org v: 21.1.13 with: Xwayland v: 24.1.3 driver:
gpu: radeon resolution: 1600x900~60Hz
API: EGL v: 1.5 drivers: kms_swrast,r600,swrast
platforms: gbm,x11,surfaceless,device
API: OpenGL v: 4.5 vendor: mesa v: 24.2.3 renderer: AMD CAICOS (DRM
2.50.0 / 6.10.13-304.current LLVM 18.1.8)
API: Vulkan v: 1.3.290 drivers: N/A surfaces: xcb,xlib
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Well the second HD 6450 started playing up in all 3 OS, Zorin, Solus and Win 10 so has been returned. It started locking up startup screens and displaying artifacts. A GT 1030 has arrived today so that has gone in and seems to work well, so will try for a few days.
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