I have tried the the points 1-16 in the document https://wiki.ubuntu.com/Kernel/Debugging/Backlight but I think in the latest kernel (5.5++) some parameters are removed. https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
Point 10: use_bios_initial_backlight is not found in: https://www.kernel.org/doc/html/latest/search.html?q=use_bios_initial_backlight&check_keywords=yes&area=default Point 11: https://www.kernel.org/doc/html/latest/search.html?q=use_native_backlight&check_keywords=yes&area=default# On 5.6.rc1 the parameters for vide are under: /sys/module/video/parameters/ report_key_events only_lcd hw_changes_brightness disable_backlight_sysfs_if device_id_scheme brightness_switch_enabled allow_duplications The problem is I have not found any documentation to these parameters too... :( -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861925 Title: BrightnessOutofRange: Actual brightness for amdgpu_bl0 not in range 0..255 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861925/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
