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@Loboris : thanks for latest script.bin & uImage.
perfect. it works.
before :
$ uptime
21:22:57 up 14 min, 1 user, load average: 3.00, 2.85, 1.85
$ ps axuwww | grep D
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 33 0.0 0.0 0 0 ? D 21:08 0:00 [usb-hardware-sc]
root 54 0.0 0.0 0 0 ? D 21:08 0:00 [vsync proc 0]
root 55 0.0 0.0 0 0 ? D 21:08 0:00 [vsync proc 1]
root 56 0.0 0.0 0 0 ? S< 21:08 0:00 [SunxiDisCommit]
root 307 0.0 0.2 6516 2088 ? Ss 21:08 0:00 /usr/sbin/sshd -D
$ dmesg
[ 240.550139] INFO: task vsync proc 0:54 blocked for more than 120 seconds.
[ 240.558166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 240.567464] vsync proc 0 D c06d1388 0 54 2 0x00000000
[ 240.575100] [<c06d1388>] (__schedule+0x6a8/0x784) from [<c06d1600>] (schedule+0x8c/0x90)
[ 240.584719] [<c06d1600>] (schedule+0x8c/0x90) from [<c00483a4>] (kthread+0x84/0xa8)
[ 240.593842] [<c00483a4>] (kthread+0x84/0xa8) from [<c000f360>] (kernel_thread_exit+0x0/0x8)
after :
$ uptime
21:43:51 up 1 min, 1 user, load average: 0.25, 0.11, 0.04
piwily@piwily:~$ ps axuwww | grep D
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 53 0.0 0.0 0 0 ? S< 21:42 0:00 [SunxiDisCommit]
root 320 0.0 0.2 6516 2088 ? Ss 21:43 0:00 /usr/sbin/sshd -D
$ dmesg
no task vsync proc blocked
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