ACPI suspend/resume

[Johannes Hofmann <Johannes.Hofmann@xxxxxx>]

I am trying to get suspend to RAM working on my Thinkpad. The machine
suspends fine, and even comes up again, but then stops in the kernel
debugger immediately. Here is a stacktrace from gdb:

. ..

#37 0xc80d4c00 in ?? ()
#38 0xdebf9988 in ?? ()
#39 0xc026ebef in cdevsw_putport (port=0xcce52700, lmsg=0x80045003)
    at /usr/src/sys/kern/kern_device.c:100
#40 0xc026ebef in cdevsw_putport (port=0xc05708e0, lmsg=0xdebf99ac)
    at /usr/src/sys/kern/kern_device.c:100
#41 0xc0289352 in lwkt_domsg (port=0x0, msg=0xdebf99ac) at msgport2.h:86
#42 0xc026ee5f in dev_dioctl (dev=0xcce52700, cmd=0, data=0x0, fflag=0, td=0x0)
    at /usr/src/sys/kern/kern_device.c:222
#43 0xc02d9a24 in spec_ioctl (ap=0x0)
    at /usr/src/sys/vfs/specfs/spec_vnops.c:370
#44 0xc02d95b0 in spec_vnoperate (ap=0x0)
    at /usr/src/sys/vfs/specfs/spec_vnops.c:125
#45 0xc0405797 in ufs_vnoperatespec (ap=0x0)
    at /usr/src/sys/vfs/ufs/ufs_vnops.c:2384
#46 0xc02d449a in vop_ioctl (ops=0x0, vp=0x0, command=0, data=0x0, fflag=0, 
    cred=0x0, td=0x0) at /usr/src/sys/kern/vfs_vopops.c:555
#47 0xc02d3ffc in vn_ioctl (fp=0xc1744a00, com=2147766275, 
    data=0xdebf9b50 "\003", td=0x0) at /usr/src/sys/kern/vfs_vnops.c:903
#48 0xc029d445 in mapped_ioctl (fd=3, com=2147766275, uspc_data=---Can't read userspace from dump, or kernel process---

) at file2.h:91
#49 0xc029cf7f in ioctl (uap=0x0) at /usr/src/sys/kern/sys_generic.c:392
#50 0xc0479e24 in syscall2 (frame=
      {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = -1077938180, tf_esi = -1077937904, tf_ebp = -1077938312, tf_isp = -557867660, tf_ebx = -1077938400, tf_edx = 2, tf_ecx = 671531072, tf_eax = 54, tf_trapno = 12, tf_err = 2, tf_eip = 671847888, tf_cs = 31, tf_eflags = 642, tf_esp = -1077938436, tf_ss = 47})
    at /usr/src/sys/i386/i386/trap.c:1338
#51 0xc046690a in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:854



Any ideas how to debug this further?

  Johannes

PS: I am running 1.3.5-DEVELOPMENT