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The Legion Y540 was an up-spec’d Ideapad I found this after booting GRUB with the acpi_video=vendor option, which resulted in /sys/class/backlight/ideapad.
#Lenovo brightness control series#
The Legion series was spec’d for primarily Windows gaming and so most likely will not receive any Linux support from Lenovo.Couple things I’ve found while troubleshooting. It’s model 15IRH, has only RTX 2060 Ti graphics (no hybrid in BIOS possible). I have a Lenovo Legion Y540 which is a precursor to the Legion 5. Thank to everyone who will spend their time on this! If you have the same problem of mine hit like so developers may see this is a shared problem. If needed, I can attach a nvidia-bug-report.log. I don’t really know what to do know and I cannot find any other solution on the web, I hope if someone of you can help me fixing this problem. Tried dynamical mode but screen froze after login.I added “RegistryDwords” “EnableBrightnessControl=1” to /usr/share/X11//nf.I added acpi_backlight=video/none/… acpi_osi=linux to /etc/default/grub.I’ve tried many soultions found on this forum, on, and so on… to name a few: I have a dual boot with Windows and there everything works fine. With F5/F6 buttons I can change the brightness bar, but brightness is not actually changing (also battery is running low very fast). Hi everyone! I have a problem that is driving me crazy these days.