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RedSnake64 / openwrt-yun

OpenWrt for Arduino Yún
GNU General Public License v2.0
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USB sound card issue #4

Closed sai-y closed 8 years ago

sai-y commented 8 years ago

I am experiencing a weird problem with my USB sound card (The Yun runs Chaos Calmer). Every now and then, the sound card stops working. I took a look at the system messages when it stops working. I see these messages:

[ 3152.500000] retire_capture_urb: 5000 callbacks suppressed [ 3157.510000] retire_capture_urb: 5000 callbacks suppressed [ 3162.520000] retire_capture_urb: 5000 callbacks suppressed [ 3167.530000] retire_capture_urb: 5000 callbacks suppressed

The sound card starts working only after power cycling/rebooting the Yun. This is also seen with the official Yun image from the arduino repo. This seems like a USB driver issue. Any thoughts on how to resolve this?

RedSnake64 commented 8 years ago

Hi sai-y,

Please tell me more details... Which USB sound card do you use? Sound card directly connected to Yun? (without USB hub?) Which driver? How long does it work? I will try a USB sound card next days.

sai-y commented 8 years ago

Hi,

  1. I am using this sound card: http://www.bhphotovideo.com/bnh/controller/home?O=&sku=1123982&gclid=CIz3h-Pq68sCFYiVfgod-hACQw&Q=&ap=y&m=Y&c3api=1876%2C92051677562%2C&is=REG&A=details
  2. Yes the sound card is interfaced directly to the Yun without a hub.

3) It works with the kmod-usb-audio driver available with the Yun.

4) Sometimes it works for a day. Sometimes, it resets within a couple of hours.

I used another sound card. It works without a problem on occasion. But then, on other occasions, the results were the same.

sai-y commented 8 years ago

Another update: It looks there used to be a similar problem with the Raspberry Pi in the past.

https://github.com/raspberrypi/firmware/issues/197

I tried 22.05 kHz and it still failed. So, I am currently trying 16 kHz. It looks like the USB audio driver might need a fix. I will keep you posted if I learn anything.

On Thu, Mar 31, 2016 at 11:04 AM, RedSnake64 notifications@github.com wrote:

Hi sai-y,

Please tell me more details... Which USB sound card do you use? Sound card directly connected to Yun? (without USB hub?) Which driver? How long does it work? I will try a USB sound card next days.

— You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub https://github.com/RedSnake64/openwrt-yun/issues/4#issuecomment-204058251

RedSnake64 commented 8 years ago

Hi sai-y,

Does it work with 16kHz?

sai-y commented 8 years ago

No. The problem repeats on 16 kHz as well. This is not a driver issue.

I spoke to the manufacturers of the Yun. This happens only with the V4 of the Yuns and not V5. It turns out the V4 does not have a voltage regulator that stabilizes the power supply. This is a hardware bug.

Sai

On Thu, Apr 14, 2016 at 9:35 AM, RedSnake64 notifications@github.com wrote:

Hi sai-y,

Does it work with 16kHz?

— You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub https://github.com/RedSnake64/openwrt-yun/issues/4#issuecomment-210038775

RedSnake64 commented 8 years ago

Hi Sai,

Do you already tried a USB hub with an external power supply?

sai-y commented 8 years ago

Unfortunately, I cannot use a USB hub. My Yun is installed in the ceiling.

Sai

On Thu, Apr 14, 2016 at 10:06 AM, RedSnake64 notifications@github.com wrote:

Do you already tried a USB hub with an external power supply?

— You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub https://github.com/RedSnake64/openwrt-yun/issues/4#issuecomment-210051902