from http://puredata.info/docs/raspberry-pi/FrontPage
"note: "dwc_otg.speed=1" is a string to add to the file, /boot/cmdline.txt, which slows down all USB devices to 1.1 speed - including ethernet. For some reason, when running with slow USB, USB (wired or with wireless dongle) keyboards don't work (connecting one will instantly crash the pi). The workaround is to either use a bluetooth keyboard or log in remotely via ssh -XY See, e.g.,"
2014-06-28 3:21 GMT-03:00 Ivica Bukvic ico@vt.edu:
I unfortunately don't have the SD card with the said version of raspbian handy but FWIW I do recall not having to adjust boot parameters in the most recent install and had no problems connecting wired keyboard, mouse, and a monitor without pi crashing. On Jun 28, 2014 9:52 AM, "Alexandre Torres Porres" porres@gmail.com wrote:
On 29/06/14 01:03, Ivica Bukvic via Pd-list wrote:
Many sound cards do not require the "dwc_otg.speed=1" setting, get one of those. The RPi USB is really quite awful, and many sound cards do things it cannot cope with, but the simple ones are mostly fine. I believe it has been improved over time, so a recent raspbian would be sensible. I've used wireless keyboards or wifi with usb audio on a few occasions, but usually try to make all communications via ethernet and custom interfaces via the local GPIOs.
this audio chip has worked well, sounds clean and is cheap ...
http://www.ebay.com/itm/5V-USB-Powered-PCM2704-MINI-USB-Sound-Card-DAC-decod...
or
http://www.ebay.com/itm/PCM2704-USB-DAC-to-S-PDIF-Sound-Card-Decoder-Board-3...
Some Bluetooth keyboards do a very annoying 'sleep' to save battery .. but then they don't send the first couple of keystrokes when you start typing again, meaning you need to hit shift before starting typing to wake it up. Useless when trying to use it for cues etc. No idea how common this design is, but I wasted some cash (much more than the audio card!) on mine.
Simon
I need an audio in and I got an imic griffin, it says on pd page i need to make this adjustment, how do I know if I don't really need to do it anymore? Anyway, if raspbian has changed, maybe we should update the pd page about it
I dont mind getting a bluetooth keyboard if I have to, I just wonder if any should work fine or if there are some issues.
thanks cheers
2014-06-28 13:21 GMT-03:00 Simon Wise via Pd-list pd-list@lists.iem.at:
Boot rpi without the fix, connect the soundcard, and test its audio output. If it crackles, or simply doesn't work, then you know it doesn't work without the fix. For good measure you can also try input (e.g. use pd's audio tester patch).
Regarding alternative soundcards, you can also try http://www.newegg.com/Product/Product.aspx?Item=N82E16812186035 (approx. $8.50, tiny form factor). We got these for both rpi orchestra and a 50 rpi installation and it works perfect.
HTH On Jun 28, 2014 3:30 PM, "Alexandre Torres Porres via Pd-list" < pd-list@mail.iem.at> wrote:
oh, sorry, I didnt see this... yep, it crackles a lot for my taste
2014-06-28 16:41 GMT-03:00 Ivica Bukvic ico@vt.edu:
by the way, what's the deal, is it not supposed to work at all at usb 2.0 speed or is it just that it works "better" at 1.0? And if so, how better?
cheers
2014-06-28 16:28 GMT-03:00 Alexandre Torres Porres porres@gmail.com:
On 29/06/14 05:28, Alexandre Torres Porres wrote:
this is a possibility then, if you only need two channels in, it has analogue and spdiff input, seems good quality, is put together for the raspberry and fits the board nicely and is not usb so will avoid all the usb issues ... but I haven't tried it, listed as $32 so comparable getting a bluetooth keyboard + adapter etc.
http://www.element14.com/community/community/raspberry-pi/raspberry-pi-acces...
Simon
looks like a nice audio card, will think about getting it, thanks. Anyway, sticking to an original question, would ANY bluetooth keyboard work on the Raspberry Pi? I mean, I assume there must be a few dongles around that would work on it while others not, but as soon as you have a dongle working I assume any keyboard/mouse could work. But then, I'm not sure at all.
Thanks
2014-06-30 2:24 GMT-03:00 Simon Wise simonzwise@gmail.com:
On 03/07/14 11:15, Alexandre Torres Porres wrote:
as I said earlier, at least some bluetooth keyboards have a very annoying pattern of sleeping when not used, then missing the first keystrokes that serve to wake them up ... but surely others will do it better??? test before you buy!
Simon