Yo,

I'm still experiencing problems with printing to a USB printer as
previously described in a reply on netbsd-users[1] (System panics
with "concurrent" lps, printing from like xpdf, soffice etc.) which 
I thought had disappeared. It's happening with NetBSD 3.99.3 (GENERIC.MP) 
#0: Wed Apr 20 20:26:27 CEST 2005 (whole system built at that date).

This is on a p4 (ht - mp) based dell:

uhci0 at pci0 dev 29 function 0: Intel 82801EB/ER USB UHCI Controller (rev. 0x02)
uhci0: interrupting at ioapic0 pin 16 (irq 11)
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci[1-3] follow
usb[1-3] follow
uhub[1-3] follow
ehci0 + usb4 + uhub4 follow
ulpt0 at uhub0 port 1 configuration 1 interface 0
ulpt0: Dell Dell Laser Printer P1500, rev 1.10/1.00, addr 2, iclass 7/1
ulpt0: using bi-directional mode

(gdb) bt
#0  0xc0b00000 in ?? ()
#1  0xc04a0748 in cpu_reboot ()
#2  0xc039b783 in db_sync_cmd ()
#3  0xc039b1ce in db_command ()
#4  0xc039aed8 in db_command_loop ()
#5  0xc039e2b9 in db_trap ()
#6  0xc049d33a in kdb_trap ()
#7  0xc04ad4da in trap ()
#8  0xc010be63 in calltrap ()
#9  0xc02cdde0 in uhci_abort_xfer ()
#10 0xc02cdbf8 in uhci_device_bulk_abort ()
#11 0xc06229f5 in usbd_ar_pipe ()
#12 0xc06226f2 in usbd_abort_pipe ()
#13 0xc0633ee9 in ulptclose ()
#14 0xc04322d7 in spec_close ()
#15 0xc0399a52 in ufsspec_close ()
#16 0xc042b16f in VOP_CLOSE ()
#17 0xc0429c62 in vn_close ()
#18 0xc042a745 in vn_closefile ()
#19 0xc03c75e7 in closef ()
#20 0xc03c7404 in fdfree ()
#21 0xc03cc94e in exit1 ()
#22 0xc03cc756 in sys_exit ()
#23 0xc04acf08 in syscall_plain ()


I'm baking a DEBUG kernel (along with a netbsd.gdb) and see if I can 
reproduce it (it's become harder to trigger AFAICT, so could take some 
time.). I have the dump lying around if it helps someone.

Regards,

-Martin

[1] http://mail-index.netbsd.org/netbsd-users/2005/04/12/0005.html