硬件：笔记本电脑
sudo apt-fast upgrade系统并重启之后（鼠标键盘一直插着呢，没动，前面还用着好好的，升级后就歇菜了），发现外接的鼠标和键盘用起来响应速度明显变得迟钝了很多，用起来好难受（键已经敲下去了，相应的字母会延迟出现；鼠标也一样死样子）。
但笔记本自身的的触摸板和键盘用起来非常流畅，没有一点问题。
xset m default或xset m N虽然能改变相应的移动速度，但迟缓问题却无法改变。
代码： 全选
kashu:~$ xinput --list-props "pointer:USB Optical Mouse"
Device 'USB Optical Mouse':
Device Enabled (136): 1
Coordinate Transformation Matrix (138): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (262): 0
Device Accel Constant Deceleration (263): 1.000000
Device Accel Adaptive Deceleration (264): 1.000000
Device Accel Velocity Scaling (265): 10.000000
Device Product ID (253): 1121, 19746
Device Node (254): "/dev/input/event6"
Evdev Axis Inversion (266): 0, 0
Evdev Axes Swap (268): 0
Axis Labels (269): "Rel X" (146), "Rel Y" (147), "Rel Vert Wheel" (261)
Button Labels (270): "Button Left" (139), "Button Middle" (140), "Button Right" (141), "Button Wheel Up" (142), "Button Wheel Down" (143), "Button Horiz Wheel Left" (144), "Button Horiz Wheel Right" (145)
Evdev Scrolling Distance (271): 1, 1, 1
Evdev Middle Button Emulation (272): 0
Evdev Middle Button Timeout (273): 50
Evdev Third Button Emulation (274): 0
Evdev Third Button Emulation Timeout (275): 1000
Evdev Third Button Emulation Button (276): 3
Evdev Third Button Emulation Threshold (277): 20
Evdev Wheel Emulation (278): 0
Evdev Wheel Emulation Axes (279): 0, 0, 4, 5
Evdev Wheel Emulation Inertia (280): 10
Evdev Wheel Emulation Timeout (281): 200
Evdev Wheel Emulation Button (282): 4
Evdev Drag Lock Buttons (283): 0
kashu:~$ xinput --list-props "pointer:SynPS/2 Synaptics TouchPad"
Device 'SynPS/2 Synaptics TouchPad':
Device Enabled (136): 1
Coordinate Transformation Matrix (138): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (262): 1
Device Accel Constant Deceleration (263): 2.500000
Device Accel Adaptive Deceleration (264): 1.000000
Device Accel Velocity Scaling (265): 12.500000
Synaptics Edges (286): 1759, 5297, 1619, 4223
Synaptics Finger (287): 25, 30, 0
Synaptics Tap Time (288): 180
Synaptics Tap Move (289): 224
Synaptics Tap Durations (290): 180, 180, 100
Synaptics ClickPad (291): 0
Synaptics Middle Button Timeout (292): 75
Synaptics Two-Finger Pressure (293): 282
Synaptics Two-Finger Width (294): 7
Synaptics Scrolling Distance (295): 102, 102
Synaptics Edge Scrolling (296): 1, 0, 0
Synaptics Two-Finger Scrolling (297): 1, 0
Synaptics Move Speed (298): 1.000000, 1.750000, 0.039177, 0.000000
Synaptics Button Scrolling (299): 1, 1
Synaptics Button Scrolling Repeat (300): 1, 1
Synaptics Button Scrolling Time (301): 100
Synaptics Off (302): 0
Synaptics Locked Drags (303): 0
Synaptics Locked Drags Timeout (304): 5000
Synaptics Tap Action (305): 2, 3, 0, 0, 1, 3, 2
Synaptics Click Action (306): 1, 1, 0
Synaptics Circular Scrolling (307): 0
Synaptics Circular Scrolling Distance (308): 0.100000
Synaptics Circular Scrolling Trigger (309): 0
Synaptics Circular Pad (310): 0
Synaptics Palm Detection (311): 0
Synaptics Palm Dimensions (312): 10, 200
Synaptics Coasting Speed (313): 20.000000, 50.000000
Synaptics Pressure Motion (314): 30, 160
Synaptics Pressure Motion Factor (315): 1.000000, 1.000000
Synaptics Resolution Detect (316): 1
Synaptics Grab Event Device (317): 0
Synaptics Gestures (318): 1
Synaptics Capabilities (319): 1, 0, 1, 1, 1, 1, 1
Synaptics Pad Resolution (320): 81, 61
Synaptics Area (321): 0, 0, 0, 0
Synaptics Noise Cancellation (322): 25, 25
Device Product ID (253): 2, 7
Device Node (254): "/dev/input/event5"
