友善在\frameworks\base\packages\SystemUI\ 里 更改了源码，使其在android 的 界面，statusbar 上 增加了虚拟按键音量，返回和目录 等虚拟按键。
现在我不需要，想将其删除。我便将友善增改的一些代码注释掉了。重新编译后，没有错误。烧进开发板里面启动 界面一直在最后一个android界面
是怎么回事啊？ 我还需要修改其他地方吗？ 最后串口打印的信息如下
warning: `zygote' uses 32-bit capabilities (legacy support in use)
request_suspend_state: wakeup (3->0) at 79079171475 (2020-08-15 18:08:17.2533807
37 UTC)
init: untracked pid 1098 exited
init: untracked pid 1105 exited
request_suspend_state: wakeup (0->0) at 98254064678 (2020-08-15 18:08:36.4282739
26 UTC)
init: untracked pid 1208 exited
init: untracked pid 1209 exited
request_suspend_state: wakeup (0->0) at 117495296362 (2020-08-15 18:08:55.669505
685 UTC)
init: untracked pid 1236 exited
init: untracked pid 1237 exited
request_suspend_state: wakeup (0->0) at 136772216182 (2020-08-15 18:09:14.946425
760 UTC)
init: untracked pid 1265 exited
init: untracked pid 1266 exited
request_suspend_state: wakeup (0->0) at 155859575294 (2020-08-15 18:09:34.033784
632 UTC)
init: untracked pid 1293 exited
init: untracked pid 1294 exited
request_suspend_state: wakeup (0->0) at 174618772572 (2020-08-15 18:09:52.792981
715 UTC)
init: untracked pid 1322 exited
init: untracked pid 1323 exited
request_suspend_state: wakeup (0->0) at 193698949159 (2020-08-15 18:10:11.873158
542 UTC)
init: untracked pid 1350 exited
init: untracked pid 1351 exited
request_suspend_state: wakeup (0->0) at 212491787595 (2020-08-15 18:10:30.665996
858 UTC)
init: untracked pid 1378 exited
init: untracked pid 1379 exited
request_suspend_state: wakeup (0->0) at 231614712573 (2020-08-15 18:10:49.788921
700 UTC)
init: untracked pid 1407 exited
init: untracked pid 1406 exited
request_suspend_state: wakeup (0->0) at 250794374362 (2020-08-15 18:11:08.968583
805 UTC)
init: untracked pid 1435 exited
init: untracked pid 1434 exited
request_suspend_state: wakeup (0->0) at 269752544437 (2020-08-15 18:11:27.926753
610 UTC)
init: untracked pid 1462 exited
init: untracked pid 1463 exited
request_suspend_state: wakeup (0->0) at 288897304016 (2020-08-15 18:11:47.071513
459 UTC)
init: untracked pid 1491 exited
init: untracked pid 1492 exited
request_suspend_state: wakeup (0->0) at 307958807008 (2020-08-15 18:12:06.133015
986 UTC)
init: untracked pid 1521 exited
init: untracked pid 1522 exited
request_suspend_state: wakeup (0->0) at 327168542993 (2020-08-15 18:12:25.342752
632 UTC)
init: untracked pid 1551 exited
init: untracked pid 1552 exited
------------[ cut here ]------------
WARNING: at kernel/mutex-debug.c:78 debug_mutex_unlock+0xac/0x118()
Modules linked in: rtl8192cu
[<c016a9a4>] (unwind_backtrace+0x0/0xe4) from [<c017faf4>] (warn_slowpath_common
+0x4c/0x64)
[<c017faf4>] (warn_slowpath_common+0x4c/0x64) from [<c017fb24>] (warn_slowpath_n
ull+0x18/0x1c)
[<c017fb24>] (warn_slowpath_null+0x18/0x1c) from [<c01a5f44>] (debug_mutex_unloc
k+0xac/0x118)
[<c01a5f44>] (debug_mutex_unlock+0xac/0x118) from [<c04ed530>] (__mutex_unlock_s
lowpath+0xb4/0x110)
[<c04ed530>] (__mutex_unlock_slowpath+0xb4/0x110) from [<c0422e30>] (s3c_g3d_ioc
tl+0x158/0x270)
[<c0422e30>] (s3c_g3d_ioctl+0x158/0x270) from [<c0422f98>] (s3c_g3d_release+0x50
/0x64)
[<c0422f98>] (s3c_g3d_release+0x50/0x64) from [<c01e7f44>] (fput+0x114/0x210)
[<c01e7f44>] (fput+0x114/0x210) from [<c01e5104>] (filp_close+0x58/0x64)
[<c01e5104>] (filp_close+0x58/0x64) from [<c0182c04>] (put_files_struct+0xb8/0x1
60)
[<c0182c04>] (put_files_struct+0xb8/0x160) from [<c0182ee8>] (do_exit+0x194/0x66
4)
[<c0182ee8>] (do_exit+0x194/0x664) from [<c01836e4>] (do_group_exit+0xb0/0xe4)
[<c01836e4>] (do_group_exit+0xb0/0xe4) from [<c018e2f8>] (get_signal_to_deliver+
0x3c4/0x420)
[<c018e2f8>] (get_signal_to_deliver+0x3c4/0x420) from [<c01684ec>] (do_signal+0x
68/0x65c)
[<c01684ec>] (do_signal+0x68/0x65c) from [<c01690bc>] (do_notify_resume+0x18/0x4
8)
[<c01690bc>] (do_notify_resume+0x18/0x48) from [<c0165eb8>] (work_pending+0x24/0
x28)
---[ end trace 9ed70c20255faefd ]---
request_suspend_state: wakeup (0->0) at 346499232708 (2020-08-15 18:12:44.673441
986 UTC)
最后 一直在重复打印
request_suspend_state: wakeup (0->0) at 479614951129 (2020-08-15 18:14:57.789160
437 UTC)
init: untracked pid 1778 exited
init: untracked pid 1777 exited
