I should also add that all of these USB devices work rock solid running the same code and drivers on an intel laptop with Ubuntu.
On Friday, November 8, 2013 1:15:19 PM UTC-8, phil...@gmail.com wrote: > > We have a system with many USB peripherals, and we have done a lot of > experimenting with them. > Some peripherals play nicer than others, and some cause problems right > away. In general, the more USB traffic there is, the more likely we are to > have problems, and the sooner we see system crashes etc. > > Our Huawei Cell modem seems to cause problems, as do some wifi adapters, > and some Phidget interface devices, especially with lots of data flowing. > By itself our Logitech quickcam pro 9000 seems OK, but when we are using > it along with other devices we see problems. > Simple keyboards/mice, bluetooth adapters, and GPS serial ports seem OK. > Sometimes by minimizing the number of devices attached it mitigates but > does not solve the USB connects/disconnects and system crashes. > > > On Friday, November 8, 2013 11:02:20 AM UTC-8, Philip Polstra wrote: >> >> Have you seen any issues with a specific type of USB device? I have had >> good luck with the Alfa wireless adapters, but have seen issues with some >> other adapters. YMMV. >> >> >> On Fri, Nov 8, 2013 at 12:51 PM, <phil...@gmail.com> wrote: >> >>> We have seen similar issues with USB devices on the BBB and are pretty >>> mystified. We suspect a low-level bug in the USB drivers. >>> Did you ever get a good resolution? >>> >>> BTW, on the HDMI console you will probably not see kernel panic >>> messages- they are usually brought out only on the serial header, for which >>> you will need a 3.3V USB/serial FTDI adapter. >>> We also see lots of warnings and USB connect/disconnects in the system >>> logs. >>> >>> >>> >>> >>> On Saturday, November 2, 2013 6:30:44 AM UTC-7, mi...@bfo.co.uk wrote: >>>> >>>> Hi all >>>> >>>> New here, but I've been experimenting with the BeagleBone black for a >>>> few months now with much success - I2C, SPI, ADC, GPIO, UARTS are all >>>> working for me, and I have a my custom cape wining it's way from the fab >>>> to >>>> me as I type. But now I'm trying to integrate it with the USB peripherals >>>> I'll need and I am getting constant freezes. >>>> >>>> My setup. I have a good power supply (3A 5V) connected via the barrel >>>> connector. I have a powered USB hub from a reputable manufacturer and >>>> which >>>> also has a 3A supply. In that hub I have a bluetooth dongle, an Atheros 9K >>>> based Wifi dongle, and a Huawei E3131 3G modem. There's also an ethernet >>>> connection. I'm running a system derived from the Ubuntu self-installer on >>>> eLinux.org (ie that plus updates and a few additional packages) with >>>> the 3.8.13-bone28 kernel. >>>> >>>> The symptoms are after a variable number of hours the device hangs. The >>>> heartbeat LED stops and it drops off the network. I'm normally running >>>> with >>>> HDMI disabled but when I enable it I see nothing on the screen except the >>>> console login - no panic message, although when it's hung the cursor stops >>>> blinking. I have to power cycle it and when it comes back there is nothing >>>> in the logs. >>>> >>>> So I haven't got much to work from here. I had loads of issues with >>>> another Wifi card so switched to one with the atheros chipset, but I still >>>> suspect it's the USB subsystem causing the problems as I had no issues >>>> until I started plugging in devices (plus the hotplug doesn't seem to work >>>> reliably under 3.8.13). >>>> >>>> So I guess my questions are: >>>> >>>> 1. Does anyone have any suggestions - I gather a few people have been >>>> here before me. >>>> >>>> 2. Is there any way I can get some logs out of this? I've been running >>>> LInux for 20 years but am new to embedded, and I find a crash with no >>>> panic >>>> message quite disconcerting! >>>> >>>> 3. Is it likely to be hardware or software causing this? The beaglebone >>>> black is about 3 months old, so I think it's the latest revision. >>>> >>>> 4. At this point I guess my next option is upgrading to the >>>> EXPERIMENTAL or TESTING kernels from Robert Nelson (at 3.12.0-rc3 and rc7 >>>> respectively at the moment) - has anyone tried these, and are they fit for >>>> purpose? >>>> >>>> Thanks in advance. >>>> >>>> >>>> Cheers... Mike >>>> >>>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to beagleboard...@googlegroups.com. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
