键盘（映射）问题

Question

这空格键按键产生向下翻页按下按键然后空格键按键。这非常烦人，尤其是当我使用文本处理器时（它会将光标移动到页面末尾，然后产生空白）。返回键，额外按下一个键是向上翻页在这种情况下。我不确定我的问题是否与 Ubuntu 有关，还是仅与 Linux 有关。也可能是硬件错误，因为我摔过我的笔记本电脑（摔倒后一周开始出现故障）。以下是输出xev：

空格键

KeyPress event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11588814, (-133,266), root:(1067,409),
    state 0x0, keycode 117 (keysym 0xff56, Next), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

 KeyPress event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11588814, (-133,266), root:(1067,409),
    state 0x0, keycode 65 (keysym 0x20, space), same_screen YES,

    XLookupString gives 1 bytes: (20) " "
    XmbLookupString gives 1 bytes: (20) " "
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11588869, (-133,266), root:(1067,409),
    state 0x0, keycode 117 (keysym 0xff56, Next), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11588869, (-133,266), root:(1067,409),
    state 0x0, keycode 65 (keysym 0x20, space), same_screen YES,
    XLookupString gives 1 bytes: (20) " "
    XFilterEvent returns: False      

返回

KeyPress event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11664873, (903,592), root:(903,644),
    state 0x0, keycode 112 (keysym 0xff55, Prior), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11664873, (903,592), root:(903,644),
    state 0x0, keycode 36 (keysym 0xff0d, Return), same_screen YES,
"   XLookupString gives 1 bytes: (0d) "
"   XmbLookupString gives 1 bytes: (0d) "
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11664941, (903,592), root:(903,644),
    state 0x0, keycode 112 (keysym 0xff55, Prior), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x4a00001,
    root 0xd5, subw 0x0, time 11664941, (903,592), root:(903,644),
    state 0x0, keycode 36 (keysym 0xff0d, Return), same_screen YES,
"   XLookupString gives 1 bytes: (0d) "
    XFilterEvent returns: False

哪里出了问题？任何建议都将不胜感激。