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commite10981075aupstream. On some models supported by ideapad-laptop, the HW/FW can remember the state of keyboard backlight among boots. However, it is always turned off while shutting down, as a side effect of the LED class device unregistering sequence. This is inconvenient for users who always prefer turning on the keyboard backlight. Thus, set LED_RETAIN_AT_SHUTDOWN on the LED class device so that the state of keyboard backlight gets remembered, which also aligns with the behavior of manufacturer utilities on Windows. Fixes:503325f84b("platform/x86: ideapad-laptop: add keyboard backlight control support") Cc: stable@vger.kernel.org Signed-off-by: Rong Zhang <i@rong.moe> Reviewed-by: Hans de Goede <hansg@kernel.org> Link: https://lore.kernel.org/r/20250707163808.155876-3-i@rong.moe Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>