Lenovo yoga screen brightness not working

Mobo: LENOVO model: LNVNB161216 v: SDK0J40688 WIN serial: UEFI: LENOVO v: 4KCN45WW date: Д«attery: ID-1: BAT0 charge: 38.7 Wh condition: 38.7/45.0 Wh (86%) volts: 12.8/11.5 model: SMP L16M3P24 serial: Д¬PU: Info: Quad Core model: Intel Core i7-7700HQ bits: 64 type: MT MCP arch: Kaby Lake rev: 9 L2 cache: 6144 KiBДЇlags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 44817 Machine: Type: Laptop System: LENOVO product: 80WK v: Lenovo Y520-15IKBN serial: Chassis: type: 10 Wm: gnome-shell dm: GDM Distro: Manjaro Linux And if there is a solution other then waiting for a kernel update, I would be appreciated if you let me know. IвЂ™m not sure if itвЂ™s the right place to open this thread but I wanted to report this issue somehow. But only in 5.9 max_brightness is 1023 and it doesnвЂ™t work. While I was looking around I found that on LTS and 5.8 max_brightness value is set to 7500 and brightness works as expected. 5.8 is fine and I use it at the moment but itвЂ™s EOL now and I donвЂ™t want to spend a lot of time on it. But I game on this machine and having fsync makes a difference for me. Tried echo 500 > /sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-eDP-1/intel_backlight/brightness but it only makes the brightness slider change.Not the actual brightness. Slider moves but brightness doesnвЂ™t change. My laptopвЂ™s (Lenovo Legion Y520) screen backlight brightness adjustment doesnвЂ™t work with kernel 5.9.10-1.

Lenovo yoga screen brightness not working