4.9-PRE hanging on boot with USB KVM active

[Chris Pepper]

	I have an IOGear MiniView USB KVM (probably model GCS102U, 
but I can't verify from here). It has VGA & USB connections to 2 
systems, with a VGA connector and 4-port USB hub switchable between 
the 2 hosts.

	The KVM works fine with my Mac and my HP Pavilion running 
4.5-R through 4.9-PRE, but a newer Dell 600SC hangs if the KVM is 
'connected' (switched over to the PC) at boot time (under 4.8-R 
through RELENG_4 as of 2003.09.10.00.00.00). If I switch to the 600SC 
after it's up, the KVM attaches and detaches properly.

	I will write a full PR once I've gotten configured the serial 
terminal working so I can capture the hang, but in the meantime I 
wanted to mention the problem.

	Here's what the Pavilion has to say about the KVM from dmesg:

>uhci0: <Intel 82801AA (ICH) USB controller> port 0x1080-0x109f irq 
>11 at device 31.2 on pci0
>usb0: <Intel 82801AA (ICH) USB controller> on uhci0
>usb0: USB revision 1.0
>uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
>uhub0: 2 ports with 2 removable, self powered
>uhub1: Texas Instruments TUSB2046 hub, class 9/0, rev 1.10/1.25, addr 2
>uhub1: 4 ports with 4 removable, self powered

	Here's the last boot from the 600SC (without the KVM switched over):

>Copyright (c) 1992-2003 The FreeBSD Project.
>Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
>         The Regents of the University of California. All rights reserved.
>FreeBSD 4.9-PRERELEASE #0: Thu Sep 11 17:29:50 EDT 2003
>     root at www.reppep.com:/usr/obj/usr/src/sys/REPPEP
>Timecounter "i8254"  frequency 1193182 Hz
>CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2399.33-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0xf27  Stepping = 7
> 
>Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>real memory  = 402587648 (393152K bytes)
>avail memory = 387178496 (378104K bytes)
>Preloaded elf kernel "kernel" at 0xc03e0000.
>Pentium Pro MTRR support enabled
>md0: Malloc disk
>Using $PIR table, 7 entries at 0xc00fc320
>npx0: <math processor> on motherboard
>npx0: INT 16 interface
>pcib0: <ServerWorks host to PCI bridge(unknown chipset)> on motherboard
>pci0: <PCI bus> on pcib0
>em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.16> port 
>0xecc0-0xecff mem 0xfe100000-0xfe11ffff irq 10 at device 2.0 on pci0
>em0:  Speed:N/A  Duplex:N/A
>pci0: <ATI Mach64-GR graphics accelerator> at 8.0
>atapci0: <Generic PCI ATA controller> port 
>0x900-0x90f,0x36c-0x36f,0x168-0x16f,0x3ec-0x3ef,0x1e8-0x1ef irq 11 
>at device 14.0 on pci0
>ata2: at 0x1e8 on atapci0
>ata3: at 0x168 on atapci0
>atapci1: <Generic PCI ATA controller> port 
>0x8b0-0x8bf,0x374-0x377,0x170-0x177,0x3f4-0x3f7,0x1f0-0x1f7 at 
>device 15.1 on pci0
>ata0: at 0x1f0 irq 14 on atapci1
>ata1: at 0x170 irq 15 on atapci1
>ohci0: <OHCI (generic) USB controller> mem 0xfe120000-0xfe120fff irq 
>5 at device 15.2 on pci0
>usb0: OHCI version 1.0, legacy support
>usb0: SMM does not respond, resetting
>usb0: <OHCI (generic) USB controller> on ohci0
>usb0: USB revision 1.0
>uhub0: (0x1166) OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
>uhub0: 2 ports with 2 removable, self powered
>isab0: <PCI to ISA bridge (vendor=1166 device=0227)> at device 15.3 on pci0
>isa0: <ISA bus> on isab0
>pcib255: <ServerWorks host to PCI bridge(unknown chipset)> on motherboard
>pci255: <PCI bus> on pcib255
>pcib1: <Host to PCI bridge> on motherboard
>pci1: <PCI bus> on pcib1
>orm0: <Option ROMs> at iomem 0xc0000-0xc7fff,0xec000-0xeffff on isa0
>pmtimer0 on isa0
>fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
>fdc0: FIFO enabled, 8 bytes threshold
>fd0: <1440-KB 3.5" drive> on fdc0 drive 0
>atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
>atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
>kbd0 at atkbd0
>psm0: <PS/2 Mouse> irq 12 on atkbdc0
>psm0: model Generic PS/2 mouse, device ID 0
>vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
>sc0: <System console> at flags 0x100 on isa0
>sc0: VGA <16 virtual consoles, flags=0x300>
>sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
>sio0: type 16550A
>sio1: configured irq 3 not in bitmap of probed irqs 0
>ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
>ppc0: Generic chipset (ECP/PS2/NIBBLE) in COMPATIBLE mode
>ppc0: FIFO with 16/16/8 bytes threshold
>plip0: <PLIP network interface> on ppbus0
>lpt0: <Printer> on ppbus0
>lpt0: Interrupt-driven port
>ppi0: <Parallel I/O> on ppbus0
>ipfw2 initialized, divert disabled, rule-based forwarding enabled, 
>default to deny, logging disabled
>ad0: 38146MB <ST340016A> [77504/16/63] at ata0-master BIOSDMA
>acd0: CDROM <GCR-8481B> at ata2-master PIO4
>Mounting root from ufs:/dev/ad0s2a


						Regards,


						Chris Pepper

-- 
Chris Pepper:               <http://www.reppep.com/~pepper/>
Rockefeller University:     <http://www.rockefeller.edu/>