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Thread-Topic: Number of USB devices limited? 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NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[cisco.com:s=iport,cisco.onmicrosoft.com:s=selector2-cisco-onmicrosoft-com]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(-1.00)[cisco.com:dkim]; TO_DN_EQ_ADDR_ALL(0.00)[]; MLMMJ_DEST(0.00)[freebsd-questions]; WHITELIST_SPF_DKIM(-3.00)[cisco.com:d:+,cisco.com:s:+]; RCVD_COUNT_SEVEN(0.00)[7] X-ThisMailContainsUnwantedMimeParts: N --_000_BL1PR11MB550957CB5932655D66799676C5F29BL1PR11MB5509namp_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Looking at the FreeBSD handbook, Chapter 13, it looks like the expectation = is that I should be able to attach "the maximum of 126 devices". Unfortuna= tely, it seems I'm getting in the low 20s (21 FTDI serial cables, USB keybo= ard, and mouse), after which I start getting the following in the logs: "Error initializing deviceusb_alloc_device: device init 34 failed (USB_ERR_= IOERROR, ignored)" and "uhub_reattach_port: could not allocate new device". If I look at /dev/ugen*, there are the ugen devices for 0.1->0.33; so its f= eeling like there may be limit in the serial port driver for the number of = /dev/cua* devices, which presently only number cuaU0->cuaU20. So, I'm assum= ing this may not be a "USB" issue as much as the number of USB serial ports= (ucom?) that can be connected. Before I go on a code crawl to figure out how this is failing and if it can= be scaled up, I'm curious if anyone is aware of a coded limit for the numb= er of USB serial devices (or USB devices in general) that can be connected = before running in to this? I'm looking to push upwards to _maybe_ 40 FTDI d= evices. -Brian --_000_BL1PR11MB550957CB5932655D66799676C5F29BL1PR11MB5509namp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Looking at the FreeBSD handbook, Chapter 13, it looks like the expectation = is that I should be able to attach  "the maximum of 126 devices&q= uot;. Unfortunately, it seems I'm getting in the low 20s (21 FTDI serial ca= bles, USB keyboard, and mouse), after which I start getting the following in the logs:

"Error initializing deviceusb_alloc_device: device init 34 failed (USB= _ERR_IOERROR, ignored)"

and

"uhub_reattach_port: could not allocate new device".


If I look at /dev/ugen*, there are the ugen devices for 0.1->0.33; so it= s feeling like there may be limit in the serial port driver for the number = of /dev/cua* devices, which presently only number cuaU0->cuaU20. So, I'm= assuming this may not be a "USB" issue as much as the number of USB serial ports (ucom?) that can be connected.

Before I go on a code crawl to figure out how this is failing and if it can= be scaled up, I'm curious if anyone is aware of a coded limit for the numb= er of USB serial devices (or USB devices in general) that can be connected = before running in to this? I'm looking to push upwards to _maybe_ 40 FTDI devices.

          -Brian
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