Kernel 2.4.19 USB produces an Oops if devices are connected when the
computer is rebooted.
If I boot into kernel 2.4.19 with devices connected to the USB ports, then
something in the kernel usb produces an oops. This only happens if the
devices are connected when the computer is rebooted. If devices are
connected later, then the system operates correctly.
The system works fine in with 2.4.18 if devices are left connected.
The debugging outputs follow:
DW
Linux version 2.4.19 (root@mescaline) (gcc version 2.96 20000731 (Red Hat
Linux
7.1 2.96-81)) #2 Sat Aug 3 23:51:01 BST 2002
Aug 4 00:25:41 localhost kernel: usb-uhci.c: $Revision: 1.275 $ time
23:42:50 Aug 3
2002
Aug 4 00:25:41 localhost kernel: usb-uhci.c: High bandwidth mode enabled
Aug 4 00:25:41 localhost kernel: usb-uhci.c: USB UHCI at I/O 0xb400, IRQ 5
Aug 4 00:25:41 localhost kernel: usb-uhci.c: Detected 2 ports
Aug 4 00:25:41 localhost kernel: usb.c: new USB bus registered, assigned
bus number 1
Aug 4 00:25:41 localhost kernel: Product: USB UHCI Root Hub
Aug 4 00:25:41 localhost kernel: SerialNumber: b400
Aug 4 00:25:41 localhost kernel: hub.c: USB hub found
Aug 4 00:25:41 localhost kernel: hub.c: 2 ports detected
Aug 4 00:25:41 localhost kernel: PCI: Found IRQ 5 for device 00:04.3
Aug 4 00:25:41 localhost kernel: PCI: Sharing IRQ 5 with 00:04.2
Aug 4 00:25:41 localhost kernel: PCI: Sharing IRQ 5 with 00:0d.0
Aug 4 00:25:41 localhost kernel: usb-uhci.c: USB UHCI at I/O 0xb000, IRQ 5
Aug 4 00:25:41 localhost kernel: usb-uhci.c: Detected 2 ports
Aug 4 00:25:41 localhost kernel: usb.c: new USB bus registered, assigned
bus number 2
Aug 4 00:25:41 localhost kernel: Product: USB UHCI Root Hub
Aug 4 00:25:41 localhost kernel: SerialNumber: b000
Aug 4 00:25:41 localhost kernel: hub.c: USB hub found
Aug 4 00:25:41 localhost kernel: hub.c: 2 ports detected
Aug 4 00:25:41 localhost kernel: usb-uhci.c: v1.275:USB Universal Host
Controller Interface driver
Aug 4 00:25:41 localhost kernel: usb.c: USB disconnect on device 1
Aug 4 00:25:41 localhost kernel: hub.c: usb_hub_port_status (1) failed (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: connect-debounce failed, port 1
disabled
Aug 4 00:25:41 localhost kernel: hub.c: cannot disable port 1 of hub 1 (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: usb_hub_port_status (1) failed (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: get_hub_status failed
Aug 4 00:25:41 localhost random: Initializing random number generator:
succeeded
Aug 4 00:25:41 localhost kernel: usb.c: USB bus 1 deregistered
Aug 4 00:25:41 localhost kernel: usb.c: USB disconnect on device 1
Aug 4 00:25:41 localhost kernel: hub.c: usb_hub_port_status (1) failed (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: connect-debounce failed, port 2
disabled
Aug 4 00:25:41 localhost kernel: hub.c: cannot disable port 2 of hub 1 (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: get_hub_status failed
Aug 4 00:25:41 localhost kernel: hub.c: usb_hub_port_status (1) failed (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: usb_hub_port_status (1) failed (err
= -19)
Aug 4 00:25:41 localhost kernel: hub.c: get_hub_status failed
Aug 4 00:25:41 localhost kernel: Unable to handle kernel NULL pointer
dereference at virtual address 00000002
Aug 4 00:25:41 localhost kernel: printing eip:
Aug 4 00:25:41 localhost kernel: c01ca0df
Aug 4 00:25:41 localhost kernel: *pde = 00000000
Aug 4 00:25:41 localhost kernel: Oops: 0000
Aug 4 00:25:41 localhost kernel: CPU: 0
Aug 4 00:25:41 localhost kernel: EIP: 0010:[usb_hub_reset+15/160] Not
tainted
Aug 4 00:25:41 localhost kernel: EIP: 0010:[<c01ca0df>] Not tainted
Aug 4 00:25:41 localhost kernel: EFLAGS: 00010246
Aug 4 00:25:41 localhost kernel: eax: df76cac0 ebx: df76cadc ecx:
00000001 edx: 00000000
Aug 4 00:25:41 localhost kernel: esi: 00000000 edi: c0248a6e ebp:
c0248a6e esp: c15cdf78
Aug 4 00:25:41 localhost kernel: ds: 0018 es: 0018 ss: 0018
Aug 4 00:25:41 localhost kernel: Process khubd (pid: 9, stackpage=c15cd000)
Aug 4 00:25:41 localhost kernel: Stack: df76cadc df76cae8 c0248a6e df76cac0
c01ca948 df76cac0 c024acc0 454d4f48
Aug 4 00:25:41 localhost kernel: c15faa80 00000202 c15cdfae c15cdfac
c15cc000 00030101 00000000 c029e000
Aug 4 00:25:41 localhost kernel: c029e000 c02bad80 00000f00 00000000
c15cc000 0008e000 c01cabd5 c0105000
Aug 4 00:25:41 localhost kernel: Call Trace: [usb_hub_events+104/704]
[usb_hub_thread+53/224] [stext+0/48] [stext+0/48] [kernel_thread+38/48]
Aug 4 00:25:41 localhost kernel: Call Trace: [<c01ca948>] [<c01cabd5>]
[<c0105000>] [<c0105000>] [<c0107126>]
Aug 4 00:25:41 localhost kernel: [usb_hub_thread+0/224]
Aug 4 00:25:41 localhost kernel: [<c01caba0>]
Aug 4 00:25:41 localhost kernel:
Aug 4 00:25:41 localhost kernel: Code: 80 7a 02 00 74 33 8d 9d 00 01 00 00
31 ff 8d 76 00 8b 8c 3d
Aug 4 00:25:41 localhost kernel: <7>usb.c: kusbd: /sbin/hotplug remove 1
Aug 4 00:25:41 localhost kernel: usb.c: USB bus 2 deregistered
>>EIP; c01ca0df <usb_hub_reset+f/a0> <=====
Trace; c01ca948 <usb_hub_events+68/2c0>
Trace; c01cabd5 <usb_hub_thread+35/e0>
Trace; c0105000 <_stext+0/0>
Trace; c0105000 <_stext+0/0>
Trace; c0107126 <kernel_thread+26/30>
Trace; c01caba0 <usb_hub_thread+0/e0>
Code; c01ca0df <usb_hub_reset+f/a0>
00000000 <_EIP>:
Code; c01ca0df <usb_hub_reset+f/a0> <=====
0: 80 7a 02 00 cmpb $0x0,0x2(%edx) <=====
Code; c01ca0e3 <usb_hub_reset+13/a0>
4: 74 33 je 39 <_EIP+0x39> c01ca118
<usb_hub_reset+48/a0>
Code; c01ca0e5 <usb_hub_reset+15/a0>
6: 8d 9d 00 01 00 00 lea 0x100(%ebp),%ebx
Code; c01ca0eb <usb_hub_reset+1b/a0>
c: 31 ff xor %edi,%edi
Code; c01ca0ed <usb_hub_reset+1d/a0>
e: 8d 76 00 lea 0x0(%esi),%esi
Code; c01ca0f0 <usb_hub_reset+20/a0>
11: 8b 8c 3d 00 00 00 00 mov 0x0(%ebp,%edi,1),%ecx
more /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 4
model name : AMD Athlon(tm) Processor
stepping : 4
cpu MHz : 1400.078
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov
pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 2791.83
more /proc/modules
sr_mod 12288 0 (autoclean)
pppoatm 2384 1
speedtch 11264 3 (autoclean)
printer 6672 0 (unused)
usb-uhci 21136 0 (unused)
r128 85696 1
agpgart 13536 3
ne2k-pci 5024 1 (autoclean)
8390 5952 0 (autoclean) [ne2k-pci]
ipchains 41440 5
via686a 8080 0 (unused)
w83781d 18896 0 (unused)
i2c-proc 6432 0 [via686a w83781d]
i2c-isa 1216 0 (unused)
i2c-viapro 3904 0 (unused)
ide-scsi 7776 0
ide-cd 27088 0
cdrom 27456 0 [sr_mod ide-cd]
more /proc/ioports /proc/iomem
::::::::::::::
/proc/ioports
::::::::::::::
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial(auto)
0330-0331 : cmpci Midi
0376-0376 : ide1
0388-038b : cmpci FM
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
9000-901f : Realtek Semiconductor Co., Ltd. RTL-8029(AS)
9000-901f : ne2k-pci
9400-94ff : C-Media Electronics Inc CM8738
9400-94ff : cmpci
b000-b01f : VIA Technologies, Inc. UHCI USB (#2)
b000-b01f : usb-uhci
b400-b41f : VIA Technologies, Inc. UHCI USB
b400-b41f : usb-uhci
b800-b80f : VIA Technologies, Inc. Bus Master IDE
b800-b807 : ide0
b808-b80f : ide1
d000-dfff : PCI Bus #01
d800-d8ff : ATI Technologies Inc Rage 128 Pro Ultra TF
e000-e003 : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System Controller
e300-e37f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
e300-e37f : via686a-sensors
e800-e80f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
e800-e807 : viapro-smbus
::::::::::::::
/proc/iomem
::::::::::::::
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-1ffebfff : System RAM
00100000-00226460 : Kernel code
00226461-0029d35f : Kernel data
1ffec000-1ffeefff : ACPI Tables
1ffef000-1fffefff : reserved
1ffff000-1fffffff : ACPI Non-volatile Storage
f3000000-f3efffff : PCI Bus #01
f3000000-f3003fff : ATI Technologies Inc Rage 128 Pro Ultra TF
f3f00000-fb7fffff : PCI Bus #01
f4000000-f7ffffff : ATI Technologies Inc Rage 128 Pro Ultra TF
fb800000-fb800fff : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System
Controller
fc000000-fdffffff : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System
Controller
ffff0000-ffffffff : reserved
lspci -vvv
00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System
Controller (rev 13)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 32
Region 0: Memory at fc000000 (32-bit, prefetchable) [size=32M]
Region 1: Memory at fb800000 (32-bit, prefetchable) [size=4K]
Region 2: I/O ports at e000 [disabled] [size=4]
Capabilities: [a0] AGP version 2.0
Status: RQ=15 SBA+ 64bit- FW+ Rate=x1,x2
Command: RQ=0 SBA+ AGP+ 64bit- FW- Rate=x2
00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] AGP
Bridge (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: f3000000-f3efffff
Prefetchable memory behind bridge: f3f00000-fb7fffff
BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-
00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 40)
Subsystem: Asustek Computer, Inc.: Unknown device 8040
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:04.1 IDE interface: VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
(rev 06) (prog-if 8a [Master SecP PriP])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at b800 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:04.2 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00
[UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 5
Region 4: I/O ports at b400 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:04.3 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00
[UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 5
Region 4: I/O ports at b000 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:04.4 Non-VGA unclassified device: VIA Technologies, Inc. VT82C686 [Apollo
Super ACPI] (rev 40)
Subsystem: Asustek Computer, Inc.: Unknown device 8040
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin ? routed to IRQ 9
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:05.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
Subsystem: Asustek Computer, Inc. CMI8738 6ch-MX
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (500ns min, 6000ns max)
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at 9400 [size=256]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8029(AS)
Subsystem: D-Link System Inc DE-528
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at 9000 [size=32]
01:05.0 VGA compatible controller: ATI Technologies Inc Rage 128 Pro Ultra
TF (prog-if 00 [VGA])
Subsystem: ATI Technologies Inc Rage Fury Pro/Xpert 2000 Pro
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (2000ns min), cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: Memory at f4000000 (32-bit, prefetchable) [size=64M]
Region 1: I/O ports at d800 [size=256]
Region 2: Memory at f3000000 (32-bit, non-prefetchable) [size=16K]
Expansion ROM at f3fe0000 [disabled] [size=128K]
Capabilities: [50] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=15 SBA+ AGP+ 64bit- FW- Rate=x2
Capabilities: [5c] Power Management version 2
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
more /proc/bus/usb/devices
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB UHCI Root Hub
S: SerialNumber=b000
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms
T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=ff(vend.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=06b9 ProdID=4061 Rev= 0.00
S: Manufacturer=ALCATEL
S: Product=Speed Touch USB
S: SerialNumber=0090D0490F38
C:* #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbdevfs
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=50ms
I: If#= 1 Alt= 0 #EPs= 0 Cls=ff(vend.) Sub=00 Prot=00 Driver=Alcatel
SpeedTouch USB
I: If#= 1 Alt= 1 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=Alcatel
SpeedTouch USB
E: Ad=06(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=07(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=87(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I: If#= 1 Alt= 2 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=Alcatel
SpeedTouch USB
E: Ad=06(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms
E: Ad=07(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms
E: Ad=87(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I: If#= 1 Alt= 3 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=Alcatel
SpeedTouch USB
E: Ad=06(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms
E: Ad=07(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms
E: Ad=87(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=usbdevfs
E: Ad=05(O) Atr=02(Bulk) MxPS= 8 Ivl=0ms
E: Ad=85(I) Atr=02(Bulk) MxPS= 8 Ivl=0ms
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB UHCI Root Hub
S: SerialNumber=b400
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
P: Vendor=04e8 ProdID=300c Rev= 1.00
S: Manufacturer=Samsung Electronics Co., Ltd.
S: Product=Samsung Laser Printer ML-1200 Series
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp
E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
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