On Sun, 26 Dec 2004 11:44:12 -0500 (EST)
Alan Stern wrote:

>  run to help out?   If needs be, I can modify/rebuild usb
> > modules.

Hi Alan,

Alt-SysRq-T output attached :-)  Hopefully I extracted the relevant
part.

I'm just barely aware of Alt-SysRq ...  After dumping the stack, I went
into emacs and type ctl-x ctl-f (if I recall correctly) and my machine
shutdown.  I assume that's an effect of "sysrq mode".  How do I turn the
mode back off?

David
Dec 26 12:25:29 osage kernel: usb 4-2: new high speed USB device using address 2
Dec 26 12:25:30 osage kernel: scsi0 : SCSI emulation for USB Mass Storage 
devices

Dec 26 12:25:47 osage kernel: SysRq : Show State
Dec 26 12:25:47 osage kernel: 
Dec 26 12:25:47 osage kernel:                                                
sibling
Dec 26 12:25:47 osage kernel:   task             PC      pid father child 
younger older

Dec 26 12:25:48 osage kernel: scsi_eh_0     D C039E888     0  4463      1       
   4464  3035 (L-TLB)
Dec 26 12:25:48 osage kernel: c3849e9c 00000046 d1504030 c039e888 00000035 
00000082 00000001 c14ea70c 
Dec 26 12:25:48 osage kernel:        c60f9da3 00000035 d1504030 00001e10 
c60fa095 00000035 d1504768 c3849f08 
Dec 26 12:25:48 osage kernel:        d15045c0 00000246 c3849ed4 c02cf1d5 
c3849f10 00000001 d15045c0 c011b450 
Dec 26 12:25:48 osage kernel: Call Trace:
Dec 26 12:25:48 osage kernel:  [__down+101/192] __down+0x65/0xc0
Dec 26 12:25:48 osage kernel:  [<c02cf1d5>] __down+0x65/0xc0
Dec 26 12:25:48 osage kernel:  [__down_failed+11/20] __down_failed+0xb/0x14
Dec 26 12:25:48 osage kernel:  [<c02cf32b>] __down_failed+0xb/0x14
Dec 26 12:25:48 osage kernel:  [pg0+542383984/1069613056] 
.text.lock.scsi_error+0x23/0x53 [scsi_mod]
Dec 26 12:25:48 osage kernel:  [<e092ff70>] .text.lock.scsi_error+0x23/0x53 
[scsi_mod]
Dec 26 12:25:48 osage kernel:  [pg0+542378499/1069613056] 
scsi_eh_tur+0x93/0x100 [scsi_mod]
Dec 26 12:25:48 osage kernel:  [<e092ea03>] scsi_eh_tur+0x93/0x100 [scsi_mod]
Dec 26 12:25:48 osage kernel:  [pg0+542378793/1069613056] 
scsi_eh_abort_cmds+0xb9/0x100 [scsi_mod]
Dec 26 12:25:48 osage kernel:  [<e092eb29>] scsi_eh_abort_cmds+0xb9/0x100 
[scsi_mod]
Dec 26 12:25:48 osage kernel:  [pg0+542382748/1069613056] 
scsi_unjam_host+0x8c/0x1d0 [scsi_mod]
Dec 26 12:25:48 osage kernel:  [<e092fa9c>] scsi_unjam_host+0x8c/0x1d0 
[scsi_mod]
Dec 26 12:25:48 osage kernel:  [pg0+542383274/1069613056] 
scsi_error_handler+0xca/0x170 [scsi_mod]
Dec 26 12:25:48 osage kernel:  [<e092fcaa>] scsi_error_handler+0xca/0x170 
[scsi_mod]
Dec 26 12:25:48 osage kernel:  [kernel_thread_helper+5/16] 
kernel_thread_helper+0x5/0x10
Dec 26 12:25:48 osage kernel:  [<c01052c5>] kernel_thread_helper+0x5/0x10

Dec 26 12:25:48 osage kernel: usb-storage   S C039E3E0     0  4464      1       
         4463 (L-TLB)
Dec 26 12:25:48 osage kernel: c384bf48 00000046 d1504030 c039e3e0 00000000 
0000000d c039e888 00000035 
Dec 26 12:25:48 osage kernel:        00000000 00000000 c38d7ca0 0000050c 
c6134eda 00000035 d15041d8 c14ea704 
Dec 26 12:25:48 osage kernel:        c384a000 00000246 c384bf88 c02cf2b0 
c14ea70c d1504030 00000000 00000001 
Dec 26 12:25:48 osage kernel: Call Trace:
Dec 26 12:25:48 osage kernel:  [__down_interruptible+128/240] 
__down_interruptible+0x80/0xf0
Dec 26 12:25:48 osage kernel:  [<c02cf2b0>] __down_interruptible+0x80/0xf0
Dec 26 12:25:48 osage kernel:  [__down_failed_interruptible+10/16] 
__down_failed_interruptible+0xa/0x10
Dec 26 12:25:48 osage kernel:  [<c02cf33e>] __down_failed_interruptible+0xa/0x10
Dec 26 12:25:48 osage kernel:  [pg0+542486719/1069613056] 
.text.lock.usb+0xf/0x80 [usb-storage]
Dec 26 12:25:48 osage kernel:  [<e09490bf>] .text.lock.usb+0xf/0x80 
[usb-storage]
Dec 26 12:25:48 osage kernel:  [kernel_thread_helper+5/16] 
kernel_thread_helper+0x5/0x10
Dec 26 12:25:48 osage kernel:  [<c01052c5>] kernel_thread_helper+0x5/0x10

Dec 26 12:25:48 osage kernel: cat           D C039E3E0     0  4514   2929       
              (NOTLB)
Dec 26 12:25:48 osage kernel: c38c5ed4 00000086 d2553a10 c039e3e0 c381c080 
00000001 0804fadc c38c5ec4 
Dec 26 12:25:48 osage kernel:        0000013c c381c080 de1a62a0 00029432 
45045c9b 00000035 d2553bb8 dffd1e24 
Dec 26 12:25:48 osage kernel:        d2553a10 00000246 c38c5f0c c02cf1d5 
dffd1e2c 00000001 d2553a10 c011b450 
Dec 26 12:25:48 osage kernel: Call Trace:
Dec 26 12:25:48 osage kernel:  [__down+101/192] __down+0x65/0xc0
Dec 26 12:25:48 osage kernel:  [<c02cf1d5>] __down+0x65/0xc0
Dec 26 12:25:48 osage kernel:  [__down_failed+11/20] __down_failed+0xb/0x14
Dec 26 12:25:48 osage kernel:  [<c02cf32b>] __down_failed+0xb/0x14
Dec 26 12:25:48 osage kernel:  [pg0+541656648/1069613056] 
.text.lock.devices+0x4f/0x97 [usbcore]
Dec 26 12:25:48 osage kernel:  [<e087e648>] .text.lock.devices+0x4f/0x97 
[usbcore]
Dec 26 12:25:48 osage kernel:  [vfs_read+207/336] vfs_read+0xcf/0x150
Dec 26 12:25:48 osage kernel:  [<c01564ff>] vfs_read+0xcf/0x150
Dec 26 12:25:48 osage kernel:  [sys_read+75/128] sys_read+0x4b/0x80
Dec 26 12:25:48 osage kernel:  [<c015681b>] sys_read+0x4b/0x80
Dec 26 12:25:48 osage kernel:  [sysenter_past_esp+82/113] 
sysenter_past_esp+0x52/0x71
Dec 26 12:25:48 osage kernel:  [<c0106dcd>] sysenter_past_esp+0x52/0x71

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