# /etc/rc.local: Local multi-user startup script. To determine if your product is still actively supported by development, enter your serial number or product type below. Applicable Brands ideapad ideacentre ThinkPad ThinkCentre Operating Systems Windows 10 Solution A. Set the brightness to a standard-value (value here 400) The brightness cannot be adjusted after upgrading to Windows 10. Output of uname -r (including because I've heard that kernels have to do with hardware support): 5.15.0-47-generic Re: Ideapad P400 Brightness Problem You can reinstall the old Windows 8 video driver: 9. Output of lsb_release -a: No LSB modules are available. Processor: AMD® Ryzen™ 5 4600H Processor (3.00 GHz, up to 4.00 GHz Max Boost, 6 Cores, 12 Threads, 8 MB Cache) My goal is for the brightness to increase and decrease when I adjust it via the Fn and brightness keys on my keyboard, when I'm booted into Ubuntu 22.04. Soundtrack Download Lenovo Ideapad P400 Brightness Control Not Working.
It seems to be running at either full brightness or close to that all the time. Manually adjust the brightness One way to fix the problem is to manually adjust. When I hold the Fn key and then press the F keys that show the brightness up and brightness down icons, I see the GUI element with a bar going left (toward empty) and right (toward full), but the screen brightness stays the same. Now the touchpad works, unlike with Ubuntu 20.04 two years ago! :) But the brightness controls don't. I tried Fedora out of curiosity, and all hardware worked this time! :) But I missed the Ubuntu ecosystem. A few months went by and a few others posted that they had the same laptop and had the same problem, but no solution ever came up.įast forward to summer 2022, and I'm trying Linux again on it. Back then, I remember installing Ubuntu 20.04 onto it and the brightness control and the touchpad both not working. I have a Lenovo laptop I bought in summer 2020.
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