[PD] The dwc_otg.speed=1 issues on RPI with keyboards

Ivica Bukvic via Pd-list pd-list at lists.iem.at
Sat Jun 28 17:03:25 CEST 2014


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 at gmail.com> wrote:

> 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 at vt.edu>:
>
>> Sorry don't know anything about keyboard conflicts. I also need to check
>> whether the distro came already with the boot config included (I just
>> remember not having to deal with that, unlike before)...
>>
>>
>> On Sat, Jun 28, 2014 at 12:28 AM, Alexandre Torres Porres <
>> porres at gmail.com> wrote:
>>
>>> what does it mean, is it automatically down speeded to USB 1.0? What
>>> about keyboard conflicts?
>>>
>>>  thanks
>>>
>>>
>>> 2014-06-28 0:07 GMT-03:00 Ivica Ico Bukvic <ico at vt.edu>:
>>>
>>> FWIW, recent install of raspbian did not require me to add this option
>>>> to boot (unless it was automatically added).
>>>>
>>>>
>>>>
>>>> *From:* Pd-list [mailto:pd-list-bounces at mail.iem.at] *On Behalf Of *Alexandre
>>>> Torres Porres via Pd-list
>>>> *Sent:* Friday, June 27, 2014 8:28 PM
>>>> *To:* pd-lista puredata
>>>> *Subject:* [PD] The dwc_otg.speed=1 issues on RPI with keyboards
>>>>
>>>>
>>>>
>>>> Hi there, so, about setting the USB to 1.1 speed in RPI with "dwc_otg.speed=1".
>>>> I've only seen a mention about it conflicting with USB and wireless
>>>> keyboards on the Pd page (meaning it works only with bluetooth ones), so I
>>>> come here to ask you people a few questions...
>>>>
>>>>
>>>>
>>>> I wonder if this could be worked around in future versions of the
>>>> raspbian operating system, seems to be some sort of a bug, right?
>>>>
>>>>
>>>>
>>>> On that note, hasn't it been already fixed by any chance? Or has anyone
>>>> found a USB or wireless keyboard that eventually works?
>>>>
>>>>
>>>>
>>>> Does it work with any bluetooth keyboard/mouse? I really don't like
>>>> those tiny mini small ones, do any of you suggest a nice bigger one? It
>>>> could be a compact one...
>>>>
>>>>
>>>>
>>>> thanks
>>>>
>>>> Alex
>>>>
>>>
>>>
>>
>
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