I forgot to include the relevant part of /var/log/messages:
Jun 18 18:24:12 george kernel: drivers/hid/usbhid/hid-core.c: can't
reset device, 0000:00:1a.0-1.2.2.4/input0, status -71
Jun 18 18:24:12 george kernel: usb 1-1.2.2: clear tt 1 (00a0) error -71
Jun 18 18:24:12 george kernel: drivers/hid/usbhid/hid-core.c: can't
reset device, 0000:00:1a.0-1.2.2.3/input0, status -71
Jun 18 18:24:12 george kernel: usb 1-1.2.2: USB disconnect, address 6
Jun 18 18:24:12 george kernel: usb 1-1.2.2.1: USB disconnect, address 7
Jun 18 18:24:12 george kernel: usb 1-1.2.2.2: USB disconnect, address 8
Jun 18 18:24:12 george kernel: usb 1-1.2.2.3: USB disconnect, address 9
Jun 18 18:24:17 george kernel: drivers/hid/usbhid/hid-core.c: can't
reset device, 0000:00:1a.0-1.2.2.3/input1, status -110
Jun 18 18:24:17 george kernel: usb 1-1.2.2: clear tt 1 (0090) error -19
Jun 18 18:24:17 george kernel: usb 1-1.2.2.4: USB disconnect, address 10
After that the system is unresponsive and I have reboot with the power
switch. Those devices are:
Jun 18 14:47:40 george kernel: generic-usb 0003:04F2:0833.0002:
input,hidraw1: USB HID v1.11 Keyboard [CHICONY USB Keyboard] on
usb-0000:00:1a.0-1.2.2.3/input0
Jun 18 14:47:40 george kernel: generic-usb 0003:045E:0029.0004:
input,hidraw3: USB HID v1.00 Mouse [Microsoft Microsoft IntelliMouse®
Optical] on usb-0000:00:1a.0-1.2.2.4/input0
One last question, should I post text only to this list or are people
happy with html formatting?
Joe
On 06/18/2012 07:42 PM, Joseph Areeda wrote:
> Greeting,
>
> This is my first post to this list, I'm hoping for some insight into a
> vexing problem.
>
> My situation is 4 computers running various operating systems: Ubuntu,
> Scientific Linux 6.2, Debian Squeeze, MacOS X lion, and Windows 7. All
> except the Mac and one Ubuntu are multiple boot and used for cross
> platform development and testing.
>
> I have a manual switch box with computers on ports 1-4 and a powered
> USB hub with mouse, keyboard, scanner, microphone and a USB headset
> adapter.
>
> There is also an HDMI and DVI switch box but they are not part of of
> the problem. Together they give me a more flexible KVM switch. I can
> watch a long running job on Monitor #2 connected to one system while
> working on another using Monitor #1.
>
> When I boot up everything works fine. I can also switch between
> systems freely. However if I leave one of the Linux systems
> disconnected for a long while it doesn't respond when I switch back to
> it. I have not seen this behavior with Windows or Mac. The Mac is
> sometimes disconnected for days but Windows usually gets booted back
> into Linux when I'm done with it.
>
> SL6 usually dies but I can usually ssh into Ubuntu and reboot
> cleanly. SL6 doesn't respond to pings or ssh. As long as I keep the
> switch box on SL6 it has run for weeks.
>
> Now I have tried 2 different USB switch boxes and when it doesn't
> respond it doesn't respond even if I plug the hub, or the mouse and
> keyboard directly into the usb ports on the system. I don't believe it
> has anything to do with the KVM the OP mentioned or my switch boxes.
>
> Searching the web I found a comment that said a powered hub per system
> worked with his USB KVM switch. I suspect we're seeing some sort of
> USB timeout. I suppose I can get a powered hub per system but I built
> these machines with 6 or 10 USB 2 and 2 or 4 USB 3 ports so I really
> don't need them. The powered hub may however convince Linux that there
> is something plugged into that port and keep it alive.
>
> Does anyone know of a reason for this or even better a fix for it?
>
> Thanks
> Joe
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