Re: [Discuss-gnuradio] Mouse/keyboard events not working raspberry pi 2

[Tom Rondeau]

On Tue, Nov 3, 2015 at 1:24 AM, Patrick Sathyanathan <address@hidden> wrote:

Hi Tom,

Thanks much, that was exactly what was happening ! I tried with a sample rate of 250k and the window responds just fine to keyboard/mouse. That's great since I don't know much about keyboard/mouse event handling and was dreading having to debug it.

The Raspberry pi 2 has a quad core processor and as long as the flow-graph does not take more than ~25-28% CPU (one entire processor) with nothing else running the GUI window responds fine. Go above that and it stops responding.

I am new to the Pi 2 and having seen this issue reported on the Pi 2 forums thought it was an obscure software bug.

--Patrick

Patrick,

Great! Glad to hear it. The RPi2 is a much more capable machine than the RPi was, but still limited, especially when running a GUI and a bunch of math signal processing. It'll probably take a bit to understand those limitations -- and then work to help improve them :)

Tom

 

________________________________
> From: address@hidden
> Date: Tue, 27 Oct 2015 10:23:23 -0400
> Subject: Re: [Discuss-gnuradio] Mouse/keyboard events not working
> raspberry pi 2
> To: address@hidden
> CC: address@hidden

>
> On Mon, Oct 26, 2015 at 6:10 PM, Patrick Sathyanathan

> <address@hidden<mailto:address@hidden>> wrote:
> Hi,
>
>
> I managed to build gnuradio from source using pybombs on a raspberry pi
> 2 machine running raspbian. It took many tries and the build itself
> took a day and only worked after increasing the swapfile size to 2GB.
>
>
> I am able to run osmocom_fft at 2.4Msps sample rate with an rtl-sdr
> dongle plugged in. However, the window does not respond to keyboard or
> mouse interactions. I unable to change the frequency in the text box.
> Nor can I move the slider. I have verified that gnuradio-companion
> works fine and accepts mouse/keyboard inputs. However, flowgraphs
> generated using GRC do not accept mouse/keyboard.
>
>
> Any idea what the problem could be ? If I switch to other windows when
> osmocom_fft is running the keyboard/mouse work just fine. I am using a
> wireless mouse and keyboard that share a single usb dongle.
>
>
> Thanks for any help,
>
>
> --Patrick
>
>
> It's quite possible that you are just overloading the rpi2's processor.
> What if you take the sample rate down to 250 ksps?
>
> Tom
>