Radeon HD 5750 - 1 Frame per Second

So, recently I managed to install Zorin OS 16 Pro on an older machine (i7-4790K), and for the most part it's running like a dream.

However, am having an issue with my Radeon HD 5750. Whenever I tried to play any videos on the monitors (2) that are connected to it, the video barely plays. Even Chromium isn't usable on those monitors if Hardware Accelerator is enabled. I've installed glxgears and ran it on these monitors and get 1 frame per second (yes, 1FPS).

Now, I have a 3rd monitor connected to the onboard video, and it works flawlessly and shows 60FPS with glxgears.

I've checked and the Radeon (NOT amdgpu) drivers are installed and the video card is being shown.

I did try to install the drivers from AMD for this card, which was published in 2015 I believe, but get an error about something not being compatible with my X.Org. It needs 1.10 and I have 1.20 installed.

I did check synaptic and everything seems to be up to date

inix -Faz:

Graphics: Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics vendor: Micro-Star MSI driver: i915
v: kernel bus ID: 00:02.0 chip ID: 8086:0412
Device-2: Advanced Micro Devices [AMD/ATI] Juniper PRO [Radeon HD 5750] vendor: Diamond Systems driver: radeon
v: kernel bus ID: 01:00.0 chip ID: 1002:68be
Display: x11 server: X.Org 1.20.11 driver: radeon compositor: gnome-shell
resolution: 1920x1080~60Hz, 2560x1080~60Hz, 2560x1080~60Hz
OpenGL: renderer: AMD JUNIPER (DRM 2.50.0 / 5.11.0-38-generic LLVM 13.0.0)
v: 3.3 Mesa 22.0.0-devel (git-c047fc9 2021-11-02 focal-oibaf-ppa) compat-v: 3.1 direct render: Yes

lshw -c video:

description: VGA compatible controller
product: Juniper PRO [Radeon HD 5750]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:43 memory:e0000000-efffffff memory:f7e20000-f7e3ffff ioport:e000(size=256) memory:c0000-dffff

Thanks for any help

I think your amd card is not supported anymore in kernel 5.11.xx (i might be wrong). I would suggest to try kernel 5.8 or 5.4.

I also found this but i dont really think it will help.

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sudo apt install linux-headers-5.8.0-63-generic linux-modules-5.8.0-63-generic linux-modules-extra-5.8.0-63-generic linux-image-5.8.0-63-generic


sudo apt install linux-headers-5.4.0-81-generic linux-modules-5.4.0-81-generic linux-modules-extra-5.4.0-81-generic linux-image-5.4.0-81-generic


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