Hello, I did the method but it didn't work ~> cat /sys/class/backlight/
*/brightness 852 ~> cat /sys/class/backlight/*/max_brightness 852 ~> ls /sys/class/backlight/*/brightness /sys/class/backlight/intel_backlight/brightness ~> echo 120000 | sudo tee /sys/class/backlight/intel_backlight//brightness 120000 /sys/class/backlight/intel_backlight//brightness: Invalid argument (os error 22) Sandratra RABENANAHARY [email protected] +261 34 63 648 85 Le ven. 16 oct. 2026 à 10:06, Changwei Zou <[email protected]> a écrit : > ** Changed in: linux (Ubuntu) > Importance: Low => Medium > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/2169585 > > Title: > Brightness locked at 100% in Ubuntu 26.04.1 > > Status in linux package in Ubuntu: > New > > Bug description: > My brightness is locked in the max. I can't change it > I already change the grub config, downgrade my kernel and use other > software but it didn't work at all > I have Thinkpad X1 Yoga, a dual boot system with Windows 11 / Ubuntu > 26.04.1 > The brightness actually work on my windows but it didn't here. > > FYI : I just upgraded my Ubuntu 24.04 to 26.06 recently, and the > brightness was already locked in the max when use the 24.04, so when I > installed the 24.04, it wasn't already working > > I didn't find any solutions so please consider my bugs. > > My kernel is actually Linux 7.0.0-38-generic > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169585/+subscriptions > > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169585 Title: Brightness locked at 100% in Ubuntu 26.04.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169585/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
