Seeking insight here ... I append a kernel debug log,
against 2.3.99 pre4-5, showing something I observed
last night. This is with a PIIX4 UHCI.
Regardless of whether this keyboard/hub is buggy or not,
there's at least one kernel problem that it's tweaking.
Any insights into what's really happening?
- Dave
modprobe usb-uhci
Apr 10 19:56:58 xenon kernel: usb-uhci.c: $Revision: 1.228 $ time 21:53:24
Apr 9 2000
Apr 10 19:56:58 xenon kernel: usb-uhci.c: High bandwidth mode enabled
Apr 10 19:56:58 xenon kernel: usb-uhci.c: Intel USB controller: setting
latency timer to 0
Apr 10 19:56:58 xenon kernel: usb-uhci.c: USB UHCI at I/O 0xfca0, IRQ 11
Apr 10 19:56:58 xenon kernel: usb-uhci.c: Detected 2 ports
Apr 10 19:56:58 xenon kernel: usb.c: new USB bus registered, assigned bus
number 1
Apr 10 19:56:58 xenon kernel: usb.c: USB new device connect, assigned device
number 1
Apr 10 19:56:58 xenon kernel: hub.c: USB hub found
Apr 10 19:56:58 xenon kernel: hub.c: 2 ports detected
device 2 is a camera that's usually plugged in there
Apr 10 19:56:59 xenon kernel: usb.c: USB new device connect, assigned device
number 2
Apr 10 19:56:59 xenon kernel: usb.c: This device is not recognized by any
installed USB driver.
plug in hub/keyboard to the other root hub port
Apr 10 19:57:47 xenon kernel: usb.c: USB new device connect, assigned device
number 3
Apr 10 19:57:47 xenon kernel: hub.c: USB hub found
Apr 10 19:57:47 xenon kernel: hub.c: 3 ports detected
Apr 10 19:57:48 xenon kernel: usb.c: USB new device connect, assigned device
number 4
Apr 10 19:57:48 xenon kernel: keybdev.c: Adding keyboard: input0
Apr 10 19:57:48 xenon kernel: input0: USB HID v1.00 Keyboard
looked at a few things with my usbdevfs bus browser,
and quit; device #2 wouldn't show its config descriptor.
Apr 10 19:58:17 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 604
Apr 10 19:58:17 xenon kernel: usbdevfs: USBDEVFS_CONTROL failed dev 2 rqt 128
rq 6 len 73 ret -32
plugged a device in to left keyboard port.
NOTE: it had just worked fine in same port, no probs ... with
two key differences: (1) OHCI, (2) keyboard wasn't in root hub.
Apr 10 20:01:01 xenon kernel: usb.c: USB new device connect, assigned device
number 5
Apr 10 20:01:01 xenon kernel: usb.c: This device is not recognized by any
installed USB driver.
Apr 10 20:01:01 xenon kernel: usb-uhci.c: interrupt, status 2, frame# 702
Apr 10 20:01:01 xenon kernel: usb-uhci-debug.h: TD @ c68c6d60/068C6D60,
MaxLen=07 DT0 EP=0 Dev=3 PID=(SETUP) buf=08467880
Apr 10 20:01:01 xenon kernel: usb-uhci-debug.h: Len=07 e0 SPD Stalled
CRC/Timeo
Apr 10 20:01:01 xenon kernel: usb-uhci-debug.h: Link points to TD @
068c6f60, Breadth first
Apr 10 20:01:01 xenon kernel: hub.c: get_hub_status failed
Apr 10 20:01:02 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 204
Apr 10 20:01:03 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1372
Apr 10 20:01:03 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1472
Apr 10 20:01:05 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 524
Apr 10 20:01:05 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 676
Apr 10 20:01:06 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1856
Apr 10 20:01:07 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 780
Apr 10 20:01:08 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 372
OK, end of experiment. "tail -40 kern.debug", notice some
interrupts, start to read the "TD" thing ...
Apr 10 20:01:09 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 448
Apr 10 20:01:09 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1028
Apr 10 20:01:09 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1124
Apr 10 20:01:10 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 148
Apr 10 20:01:10 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 192
Apr 10 20:01:15 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 468
Apr 10 20:01:16 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1344
Apr 10 20:01:16 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1476
Apr 10 20:01:17 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 924
Apr 10 20:01:18 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 64
Apr 10 20:01:19 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 548
... the disk drive started making a _very_ determined buzz ...
Apr 10 20:01:20 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1572
Apr 10 20:01:20 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 20
Apr 10 20:01:21 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 180
Apr 10 20:01:21 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 192
Apr 10 20:01:22 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1728
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 252
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 276
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 300
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 324
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 348
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 372
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 396
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 420
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 444
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 468
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 492
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 516
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 540
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 564
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 588
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 612
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 636
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 660
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 684
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 708
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 732
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 756
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 780
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 804
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 828
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 852
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 876
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 900
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 924
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 948
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 972
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 996
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1020
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1044
Apr 10 20:01:23 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1068
Apr 10 20:01:24 xenon kernel: usb-uhci.c: interrupt, status 3, frame# 1092
[ about 70 Kbytes of similar messages deleted ]
... until I yanked the keybd cable off the UHCI controller
Apr 10 20:01:44 xenon kernel: usb.c: USB disconnect on device 3
Apr 10 20:01:44 xenon kernel: usb.c: USB disconnect on device 4
Apr 10 20:01:44 xenon kernel: keybdev.c: Removing keyboard: input0
Apr 10 20:01:44 xenon kernel: usb.c: USB disconnect on device 5
The day before I'd seen a similar sort of logfile fillup
with those devices, but using OHCI. Details differed,
but the keyboard interrupt endpoint seemed to be the root
cause in that case ... as perhaps here, though I don't know
the HID/keyboard/mouse/event subsystem at all.
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