Games Running at an Unstable Framrate on Linux Mint 19.3

[Reo41]

Hello,
Please pardon me if I'm asking particularly noobish questions, I'm very new to Linux.
I'm running Linux Mint 19.3, and am using the Dolphin flatpack install via the Software Manager. I have tried running various games on my machine that I was informed would be able to run Dolphin at a consistent 60fps, and get very wild frame dips from 5-60+. Is there something that I'm doing wrong?

Specs and Dolphin version:

Operating System: Linux Mint 19.3, x86
Processor/CPU: Intel i5-4570T, 2.90 GHz
Video Card/GPU: Intel HD 4600
Memory/RAM: Crucial, 8 (2x4)GB SODIMM DDR3 1600
Dolphin Revision Currently Using: 5.0-11991

Edit: When I run games, it gives me the GFX FIFO: Unknown Opcode error.

Thank you!

[DolphinEmu64]

This will happen all the time and you're not the only one. This is common and happens if something with not to much to see on the screen changes to a scene with many things in its data. One way to see this is The Sims 2 (Gamecube edition cause there is a PS2 version too) is from a Sim making a salad or something to someone on the toilet. the lag goes CRAZY and drops to a whopping 1FPS. Though the main reason to your problem could be how much is stored in its data (I aint a expert, im still learning so im not to sure about everything)

[DJBarry004]

It would be nice to know what games are you trying to run.

[Reo41]

It would be nice to know what games are you trying to run.

I'm trying to run Pokemon XD: Gale of Darkness and SSX Tricky.