更新V20.2后，亮度调节快捷健失效

设备概况如下

[概况]
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设备:                  LENOVO 20DSA02JCD (LENOVO_MT_20DS_BU_Think_FM_ThinkPad L450) Notebook 
操作系统:                Deepin 20.2 Linux version 5.11.1-amd64-desktop (deepin@deepin-PC) (gcc (Uos 8.3.0.3-3+rebuild) 8.3.0, GNU ld (GNU Binutils for Uos) 2.31.1) #1 SMP Mon Mar 1 17:09:41 CST 2021
处理器:                 Intel(R) Core(TM) i3-5005U CPU @ 2.00GHz (双核 / 四逻辑处理器)
主板:                  Intel powered classmate PC
内存:                  4GB(KHX1600C9S3L/4G DDR3 1600MHz (0.6ns))/4GB(RMT3170ME68F9F1600 DDR3 1600MHz (0.6ns))
显示适配器:               HD Graphics 5500
音频适配器:               Wildcat Point-LP High Definition Audio Controller/Broadwell-U Audio Controller
存储设备:                64GB SATA Flash Drive (64.0 GB)/ST500LM021-1KJ152 (500 GB)
电池:                  电池
网络适配器:               Ethernet Connection (3) I218-V/RTL8192EE PCIe Wireless Network Adapter
鼠标:                  Microsoft Microsoft 3-Button Mouse with IntelliEye(TM) (Microsoft Wheel Mouse Optical)/Synaptics TM3053-003 (Synaptics TM3053-003)/TPPS/2 IBM TrackPoint (TPPS/2 IBM TrackPoint)
键盘:                  AT Translated Set 2 keyboard (AT Translated Set 2 keyboard)
显示设备:                BOE DT LCD Monitor(13.9 英寸 (309x173 mm))
图像设备:                Integrated Camera (Acer Integrated Camera)
其他设备:                Bluetooth Radio/VFS5011 Fingerprint Reader