아는 분이 몇일째 버그를 못잡아서 고생중입니다. 질문 올려봅니다.

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pxa300-A1 stepping으로 project 진행중입니다.

idle 상태에서 전력소모를 줄이기 위해서 kernel이 idle 상태로 진입시 D0CS상태로 cpu를 낮추고, idle를 빠져나올 때, 624MHz로 다시 복구하는 식으로 system을 운용중에 있습니다.

그런데, 가끔 (또는 빈번하게) 이유도 없이 system이 죽는 경우가 있습니다. serial console에 아무것도 나오지 않고, 발생하는 경로 또한 종잡을 수 없습니다. 혹시 이런 경험을 가지고 계신 분이 있는지요?

참고로, kernel은 2.6.20을 쓰고 있습니다. marvell bsp kernel source는 2.6.9, 2.6.14, 2.6.21 (마지막 39th bsp까지)를 참조해서 진행했습니다.

syslogd에서 나오는 msg는.
==============================
Jan 16 16:04:11 (none) user.warn kernel: done.
Jan 16 16:04:11 (none) user.warn kernel: Suspending console(s)
Jan 16 16:04:11 (none) user.debug kernel: ext size:404, save size208
Jan 16 16:04:11 (none) daemon.warn /sbin/apmd[247]: warning: [apmd_service] query(-11)?
Jan 16 16:04:11 (none) daemon.warn /sbin/apmd[247]: warning: err: apmd_read_handler
Jan 16 16:04:11 (none) user.debug kernel: ready to sleep:0x80299294
Jan 16 16:04:11 (none) daemon.warn /sbin/apmd[247]: warning: [apmd_service] query(-11)?
Jan 16 16:04:11 (none) user.debug kernel: Resume Back
Jan 16 16:04:11 (none) daemon.warn /sbin/apmd[247]: warning: err: apmd_read_handler
Jan 16 16:04:11 (none) daemon.warn /sbin/apmd[247]: warning: [apmd_service] query(-11)?
Jan 16 16:04:11 (none) daemon.warn /sbin/apmd[247]: warning: err: apmd_read_handler
Jan 16 16:04:11 (none) user.warn kernel: AC97 Cold Reset Success : 991
Jan 16 16:05:00 (none) user.warn kernel: done.
Jan 16 16:05:00 (none) user.warn kernel: [apm_bios_ioctl] backup_rtc
Jan 16 16:05:00 (none) user.warn kernel:
Jan 16 16:05:00 (none) daemon.warn /sbin/apmd[247]: warning: [apmd_service] query(-11)?
Jan 16 16:05:00 (none) daemon.warn /sbin/apmd[247]: warning: err: apmd_read_handler



그리고, appl쪽에서 나오는 log는.
================================
** Current time is Wed Jan 16 16:05:00 2008 **
SYSTEM: Wake-up source is backup_rtc
PMMGR: Wake-up source(backup_rtc)
PMMGR: Wake-up keep LCD off
msg from iom: APM sys=sleep
iom sys msg sleep
UTILS: Saved system storage size is out of date.
StorageManger._is_low_storage: False total: 41549824 free: 29674882
* Current time is Wed Jan 16 16:05:07 2008 *
msg from iom: APM sys=wakeup
iom sys msg wakeup
msg from iom: APM ext=TravalCharger
battery ext TravalCharger

msg from iom: KMR misc/usbd=connect
SYSTEM: USB state changed: connect
<softkey.softkey.CielSoftKey object at 0x414332d8> unset owner unset <manager.keymgr.CielLockSKHandler object at 0x41226770>
current owner <manager.keymgr.CielLockSKHandler object at 0x41226770>
whole owners [<comm.mailer.maillist.MailerScreenSoftKeyHandler object at 0x41677f50>]
<comm.mailer.maillist.MailerScreenSoftKeyHandler object at 0x41677f50> <comm.mailer.maillist.MailListScreen object at 0x41c701c0>
after removing,  <comm.mailer.maillist.MailerScreenSoftKeyHandler object at 0x41677f50> []
[PhoneMgr] handle_usb_connect, status =  True
Phoneserver:handle_message: phone.config.set_device_state ('usb', 1)
PhoneServer -> Dpram Write  'x7fx06x00x024x07x01~']
######### SYNCMGR: usb= True
usb connected with pc: connect
msg from iom: APM battery=display