Dell Ubuntu 21.10 Touchpad gestures not working after Suspend and brightness level not getting saved

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I bought Dell Inspiron 15 5515 and I am so frustrated about this issue. I use touchpad gestures heavily. Losing it feels like I lost a limp. I used a Lenovo t480 before. It never had any issue. Is this hardware specific? I tried many suggestions given online, but nothing worked. How to debug this issue.

Tried This solution . Nothing worked.

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