Arch Linux

Description:
Brightness hotkeys(Fn+F5 for decrease and Fn+F6 for Increase) are not working. Hardware Lenovo Ideapad-5-15ITL05

I used the command "watch -n1 cat /proc/interrupts". But when i pressed the brightness hot keys id didn't increased the interruptions. I also used the "acpi_listen" at that time it didn't feedback any output when i pressed the brightness hotkeys. Again I used "sudo showkey -s" it also didn't feedback any output.

The hotkeys are working on windows OS.
I have already upgraded the bios firmware but the bug still persists.
Additional info:
* Uname : 5.17.1-arch1-1
* dmi.bios.vendor: LENOVO
* dmi.bios.version: FHCN24WW
* dmi.product.family: IdeaPad 5 15ITL05
* dmi.product.name: 82FG
* dmi.product.sku: LENOVO_MT_82FG_BU_idea_FM_IdeaPad 5 15ITL05
* dmi.product.version: IdeaPad 5 15ITL05
* dmi.sys.vendor: LENOVO

I had also posted this bug on ubuntu bugs page but they didn't gave any feedback.
Here is the post https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1933373
Also reported on lenovo community unfortunately they also didn't reply.
here is the post https://forums.lenovo.com/t5/Ubuntu/Brightness-hotkeys-Fn-F5-for-decrease-and-Fn-F6-for-Increase-are-not-working-on-Ubuntu-20-04/m-p/5085245

I also saw some other people like me who are facing the same issue. I have been facing these issue since long time waiting for in newer kernel there will be fix.
Would you guys please help me?

Steps to reproduce: