bahistambay
Posts: 1
Joined: Mon Nov 04, 2013 6:27 am

Re: USB FIQ testing....

Mon Nov 04, 2013 6:30 am

My USB DVB-S2 receiver is dropping packets and when I migrated to the Pi. This doesn't happen on my Core 2 Duo machine. I hope there's a resolution. Thanks guys!

de-shu
Posts: 6
Joined: Sat Jan 04, 2014 5:27 pm

Re: USB FIQ testing....

Mon Jan 20, 2014 6:19 am

Hi,

I am using the latest master-branch kernel (3.10.25+) but I'm still having the popping issues with USB sound card. While reading this thread I couldn't understand whether it is supposed to be fixed by now or not.

The issue appears like a very small interrupt in playing that sounds like a 'p' sound. It occurs randomly about once or twice a second at 44100Hz. When switching to 48000Hz, it only plays 5% of the time, while 95% it is just silent.
The card works fine with my desktop.

fiq_split_enable=0 gives me a much worse distortion
fiq_fix_enable=0 gives me an unbootable system (didn't investigate)
speed=1 slowes down my Wi-Fi dongle and forces the sound card to enter a stereo-only mode, which is not what I meant to use it for. But it plays fine.

Please advise if I have any options except replacing my raspberry pi with a different board. I've just spent too much time compiling a rt5572usb module to give up. Thanks!

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Hayden_James
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Re: USB FIQ testing....

Thu Feb 06, 2014 5:59 am

de-shu wrote:Hi,
fiq_split_enable=0 gives me a much worse distortion
fiq_fix_enable=0 gives me an unbootable system (didn't investigate)
speed=1 slowes down my Wi-Fi dongle and forces the sound card to enter a stereo-only mode, which is not what I meant to use it for. But it plays fine.

Please advise if I have any options except replacing my raspberry pi with a different board. I've just spent too much time compiling a rt5572usb module to give up. Thanks!
Many will report it works for them which is because we are not all using Pi boards for the same reasons/projects. There's probably no fix, USB is seriously flawed and can be "improved" for some uses. Also see:
http://www.raspyfi.com/raspberry-pi-usb-audio-fix/ Hope it helps.

I've spent/wasted a lot of time and money on this issue as well. :/ Good luck!

jamesh
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Re: USB FIQ testing....

Thu Feb 06, 2014 9:34 am

I disagree with 'seriously flawed'

Seriously flawed would imply it fails in a majority of cases. It doesn't.

I'd go for slightly flawed.

And there is still work being done on making it better. Whether that can fix every thing I doubt, but it should fix most use cases.
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piglet
Posts: 911
Joined: Sat Aug 27, 2011 1:16 pm

Re: USB FIQ testing....

Fri May 09, 2014 9:23 am

I've recently connected up one of my Pi's to the family TV, with a quality powered USB hub connected to wired keyboard, mouse and USB hard drive. When running get-iplayer in one terminal to grab programs to play back later for the children using omxplayer I fairly often see repeating keystrokes when typing into a second terminal. All is well the rest of the time.

With the current code, would keyboard repeated keystrokes be expected in this sort of setup due to the significant throughput via ethernet and USB to the hard drive?

gsh
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Re: USB FIQ testing....

Fri May 09, 2014 9:28 am

What version of the kernel are you running ?

Code: Select all

$ uname -a

Make sure you've rpi-updated to the latest (always do apt-get update / upgrade first then rpi-update) kernel there have been very recent fixes

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jdb
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Re: USB FIQ testing....

Fri May 09, 2014 10:41 am

This thread now refers to a deprecated version of the driver.

Latest rpi-update kernels implement a rewrite of the FIQ - see here:

http://www.raspberrypi.org/forums/viewt ... 28&t=70437
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