https://bugzilla.kernel.org/show_bug.cgi?id=216150 Bug ID: 216150 Summary: ideapad-laptop exposes only two keyboard backlight levels, instead of three Product: Drivers Version: 2.5 Kernel Version: 5.18.1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Platform_x86 Assignee: drivers_platform_x86@xxxxxxxxxxxxxxxxxxxx Reporter: tinozzo123@xxxxxxxxxxxx Regression: No I own a Lenovo IdeaPad 5 14ARE05, which has three keyboard brightness levels: off, low and high, which are cycled through with the Fn+space key combo. However, ideapad-laptop.c sets max_brightness to 1, which means that the brightness is either off (0) or on (1). This means that I'm unable to select the high intensity brightness from ACPI like I could on a ThinkPad (I don't own one, but thinkpad_acpi.c sets max_brightness to 2, so I guess that it doesn't have that problem). Still, I don't know if this feature is present on all IdeaPad laptops. I couldn't find any documentation on this (there is an article on Lenovo's support, but it only refers to ThinkPads*). Even the user manual of my laptop doesn't mention this (it only says that it has keyboard backlight, not that it has three levels). Finally, I never tested Windows, so I don't know if Lenovo Vantage provides any more settings. Also, small note: right now, if the keyboard brightness is at high intensity (with Fn+space, since there is no other way to do it), then is set to 0 using ACPI (and *not* with Fn+space), then set to 1 again with ACPI (still *not* with Fn+space), the result is that the keyboard backlight will turn on with high intensity (and the next Fn+space will turn it off) instead of low. *https://support.lenovo.com/us/en/solutions/ht104451-how-to-turn-onoff-the-keyboard-light-backlit-on-your-laptop-thinkpad -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
