On 7/25/2014 9:31 PM, Jon Elson wrote:
I have a pretty recent Dell Optiplex 980 desktop, and my scanner
will not work at all on the rear ports. But, it works fine
on the
front ports. I don't see any difference in the lsusb
listing between
the two hubs, so I have no idea what is going on,
On 07/26/2014 03:26 AM, Gregg Eshelman wrote:
Are you certain the rear ports are enabled in BIOS setup?
Yes, the scanner enumerates and can be seen on the bus, but it
locks up and can't complete a page scan. Keyboards, cameras,
and other gear work fine on the rear ports. They seem to have
the
On 07/24/2014 09:06 PM, Gene Heskett wrote:
the real problem that caused the usb disconnect?
If the dmesg dump says something like:
hub 1-0:1.0: port 2 disabled by hub (EMI?), re-enabling...
Then I'll lay you long odds it really *is* EMI from your myriad steppers
and suchlike. Spent quite
On Friday 25 July 2014 07:50:25 Ed Nisley did opine
And Gene did reply:
On 07/24/2014 09:06 PM, Gene Heskett wrote:
the real problem that caused the usb disconnect?
If the dmesg dump says something like:
hub 1-0:1.0: port 2 disabled by hub (EMI?), re-enabling...
Its not saying exactly
On Friday 25 July 2014 15:42:23 Gene Heskett did opine
And Gene did reply:
On Friday 25 July 2014 07:50:25 Ed Nisley did opine
And Gene did reply:
On 07/24/2014 09:06 PM, Gene Heskett wrote:
the real problem that caused the usb disconnect?
If the dmesg dump says something like:
I have seen front usb ports that use very poor wiring/board layout.
(some that just don't work they are so badly designed)
sam
On 07/25/2014 08:31 PM, Gene Heskett wrote:
On Friday 25 July 2014 15:42:23 Gene Heskett did opine
And Gene did reply:
On Friday 25 July 2014 07:50:25 Ed Nisley did
Sam,
re: front panel usb ports poor design
i've seen frequent disconnects and reconnects,
even re-enumerating ( i think ) changing ttyUSB0 to ttyUSB1
on the dongle i use to talk to machines.
avoid any usb port that 'feels odd', 'feels loose' or
where connector looks like it sticks out _not_
On 07/25/2014 08:31 PM, Gene Heskett wrote:
An lsusb suggested that the front panel plugs were usb 1.1
only, so I moved it to one of the rear panel plugs
directly on the D-525-MW motherboard, On reboot it was
correctly linked to /dev/video0, and it ran solidly for
about 3 hours while I
On Friday 25 July 2014 23:09:22 sam sokolik did opine
And Gene did reply:
I have seen front usb ports that use very poor wiring/board layout.
(some that just don't work they are so badly designed)
sam
I won't argue a bit on that Sam.
After my experience trying to make a wired usb mouse
Greetings;
My camera on the milling machine is having spastic spells. Dmesg says its
disconnecting but I see no evidence of that as being a mechanical cable
problem. None of the disconnect/reconnect sessions can be blamed on my
moving the usb cable that hooks it up.
Its the only video device
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