[PD] raspberry pi user experience

[Cyrille Henry]

I also have a keyboard that did not work, and a usb flash that force a reboot...
cheers
c


Le 27/01/2013 17:51, Miller Puckette a écrit :
> I heard suggestions on the Pi sites (I forget exactly where) that the USB
> 2.0 implementation isn't compatible with a large variety of USB 2.0 devices
> (including for instance the Griffin iMic).  So I don't think the issue is
> the load that USB 2.0 puts on the Pi, it's simply bugs.  But I gather nobody
> is in a hurry to get them fixed - the attitude in Cambridge is that it's the
> devices' fault, not the Pi's.
>
> I have beem suspecting that my keyboard is also incompatible with the Pi at
> USB 1.1 speed.  I haven't tried other keyboards yet since I'm usually happy
> to ssh in without any other USB devices (besides audio and ethernet)
> talking to the Pi.  But this is not always true so soon enough I'll have to
> try other keyboards so I can get the thing working as a standalone computer.
>
> cheers
> Miller
>
> On Sun, Jan 27, 2013 at 04:50:16PM +0100, katja wrote:
>> Thanks Pierre and Cyrille.
>>
>> It turned out that various keyboards and mouse just kill USB (when at
>> 1.1) on the Pi. 'Keysonic Wireless Trackball Keyboard' happens to work
>> well. The lower USB speed brings substantial improvement of the audio
>> indeed. Now a real realtime kernel, that would probably improve things
>> further.
>>
>> Katja
>>
>>
>>
>> On Sun, Jan 27, 2013 at 2:33 PM, Cyrille Henry <ch at chnry.net> wrote:
>>> i put it in front of everything :
>>>
>>> dwc_otg.speed=1 dwc_otg.lpm_enable=0 console=ttyAMA0,115200
>>> kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4
>>> elevator=deadline rootwait
>>>
>>> cheers
>>> c
>>>
>>> Le 27/01/2013 11:42, katja a écrit :
>>>
>>>> Hello,
>>>>
>>>> Some people seem to have result with setting lower USB speed on the
>>>> Pi, but when I try this, the Pi doesn't even respond to keyboard
>>>> anymore. Checking /boot/cmdline.txt with another computer, I'm sure it
>>>> is not due to a typo. But the order of settings may be important?
>>>> Could anyone copy the full text of /boot/cmdline.txt for me, if you
>>>> have keyboard working with lowered USB speed? (I'm not talking about
>>>> good audio yet).
>>>>
>>>> Thanks,
>>>> Katja
>>>>
>>>>
>>>> On Sat, Jan 26, 2013 at 8:54 PM, Thomas Grill <gr at grrrr.org> wrote:
>>>>>
>>>>> Message to self: it seems that one has to wait for updated RPi USB
>>>>> firmware/drivers to get USB 2.0 audio going.
>>>>> Obviously the "isochronous transfer mode" as used by audio interfaces is
>>>>> currently broken.
>>>>> gr~~~
>>>>>
>>>>>
>>>>> 2013/1/26 Thomas Grill <gr at grrrr.org>
>>>>>>
>>>>>>
>>>>>> Hi all,
>>>>>> for my USB audio class 2.0 device "Native Instruments Komplete Audio 6"
>>>>>> i
>>>>>> can't report such good news.
>>>>>> There is constant irregular crackling, not only with Pd but also with
>>>>>> aplay etc. It seems related to USB bandwidth, since turning on and off
>>>>>> the
>>>>>> inputs in Pd changes crackling frequency. The dwc_otg.speed setting is
>>>>>> not
>>>>>> usable for me, since the device is dependent on USB 2.0 operation.
>>>>>> Any experiences with USB 2.0 audio devices under ALSA/rpi?
>>>>>> thanks,
>>>>>> gr~~~
>>>>>>
>>>>>>
>>>>>> 2013/1/26 Cyrille Henry <ch at chnry.net>
>>>>>>>
>>>>>>>
>>>>>>> hello,
>>>>>>>
>>>>>>> I just install raspbian release and update it. then install pd 0.44.1
>>>>>>> (without any specific optimisation flag)
>>>>>>>
>>>>>>> I made the standard optimisation :
>>>>>>> * - rtprio 99
>>>>>>> * - memlock 1000000000
>>>>>>> in /etc/security/limits.conf
>>>>>>>
>>>>>>> and
>>>>>>> dwc_otg.speed=1
>>>>>>> in /boot/cmdline.txt
>>>>>>> as suggested by miller
>>>>>>>
>>>>>>> I use a uca222 beringher (that cost about 20 or 25€) sound card.
>>>>>>> trying the test audio and midi, there is no click with 10ms audio
>>>>>>> buffer
>>>>>>> (with adc~ enable).
>>>>>>>
>>>>>>> this is with usb keyboard / mouse combo plugged and graphical interface
>>>>>>> (for the system and for pd).
>>>>>>>
>>>>>>> without X, audiobuf can be as low as 5ms
>>>>>>>
>>>>>>> having a usb keyboard did not change anything for me.
>>>>>>>
>>>>>>> i'm very happy
>>>>>>>
>>>>>>> cheers
>>>>>>> c
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Thomas Grill
>>>>>> http://grrrr.org
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Thomas Grill
>>>>> http://grrrr.org
>>>>>
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