Re: [LAU] Google TV device w/ AV out

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To: <linux-audio-user@...>
Date: Friday, June 28, 2013 - 1:52 pm

On 06/19/2013 03:39 PM, Jeremy Jongepier wrote:

Just an update. Getting things stable is quite some work actually but
I'm slowly getting there. I've stripped the kernel config a bit further
and have a good starting point now. Some findings:
* RT patch doesn't apply cleanly. I've hacked my way through it but
can't get it to compile.
* I've tried using threadirqs but then the stick wouldn't boot (couldn't
find any rootfs to load from MMC). Applied this patch:
http://www.spinics.net/lists/linux-rt-users/msg08062.html
Then I get threaded IRQs but it's not much of an improvement, the USB
IRQ that has the WiFi connected to it consumes a lot of CPU and I can't
get JACK to run stable. I did try prioritizing IRQs with rtirq but it
didn't make any difference, the board seems to run better without
threaded IRQs.
* Tried dwc_otg.speed=1 as a kernel parameter, no improvement.
* This thing doesn't have serial console access, I've tried all possible
pads, vias and pins but no joy :( I did manage to solder a button on the
board that allows me to directly boot into flash mode which is already
quite convenient.
* No ethernet access, only WiFi. But enabling WiFi means JACK won't run
properly. Also tried an external USB dongle, same problems basically.
* So I have to work using the HDMI connection and a keyboard. Had to
disable blanking otherwise JACK would crash.

Well, that last example sums it all up I guess, this board isn't really
made for doing real-time audio. Unless people prove me wrong, I'd love
to hear what other people's experiences are. Any tips, ideas,
suggestions? I'm now glazing at amsynth 1.4.0 running headless while
JACK occasionally spits out 'delay of .... usecs exceeds estimated spare
time of .....; restart ...' messages and that with jackd -P84 -p32
-t2000 -dalsa -n3 -p128 -s
I HAVE to use the ALSA -s (softmode) option otherwise the whole USB
stack locks up. Pffff, maybe I should buy a board that does work, like
the pcDuino or BeagleBone Black.

Regards,

Jeremy
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Messages in current thread:
[LAU] Google TV device w/ AV out, Dan MacDonald, (Thu May 16, 1:38 am)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Thu May 16, 7:09 am)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Thu May 16, 7:12 am)
Re: [LAU] Google TV device w/ AV out, Robert Jonsson, (Thu May 16, 8:26 am)
Re: [LAU] Google TV device w/ AV out, psk, (Fri May 17, 1:33 pm)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Thu May 16, 10:57 am)
Re: [LAU] Google TV device w/ AV out, Rob, (Thu May 16, 2:22 pm)
Re: [LAU] Google TV device w/ AV out, psk, (Fri May 17, 5:07 am)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Fri May 17, 9:08 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Sun May 26, 9:31 pm)
Re: [LAU] Google TV device w/ AV out, Carlos sanchiavedraz, (Mon May 27, 1:09 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Mon May 27, 1:28 pm)
Re: [LAU] Google TV device w/ AV out, Carlos sanchiavedraz, (Mon May 27, 3:00 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Thu Jun 13, 11:59 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Mon Jun 17, 11:51 am)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Tue Jun 18, 9:19 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Tue Jun 18, 9:48 am)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Tue Jun 18, 10:08 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Wed Jun 19, 1:39 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Fri Jun 28, 1:52 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Sat Jun 29, 12:58 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Sat Jun 29, 12:23 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Sat Jun 29, 9:57 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Mon Jul 1, 11:30 am)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Mon Jul 1, 11:50 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Mon Jul 1, 12:00 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Mon Jul 1, 2:13 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Mon Jul 1, 2:44 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Mon Jul 1, 3:16 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Thu Jul 4, 11:41 am)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Thu Jul 4, 7:01 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Thu Jul 4, 7:13 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Sun Jun 30, 7:17 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Sun Jun 30, 7:22 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Mon Jul 1, 11:08 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Sun Jun 30, 7:10 pm)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Fri Jun 28, 2:38 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Sat Jun 29, 12:31 pm)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Sat Jun 29, 1:05 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Sun Jun 30, 6:59 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Thu Jun 20, 11:36 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Thu Jun 20, 11:58 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Wed Jun 19, 7:32 am)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Wed Jun 19, 2:22 am)
Re: [LAU] Google TV device w/ AV out, psk, (Tue Jun 18, 10:02 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Wed Jun 19, 7:23 am)
Re: [LAU] Google TV device w/ AV out, psk, (Tue Jun 18, 10:00 pm)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Wed Jun 19, 7:20 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Wed Jun 19, 11:53 am)
Re: [LAU] Google TV device w/ AV out, Rob, (Fri May 17, 2:32 pm)
Re: [LAU] Google TV device w/ AV out, psk, (Fri May 17, 1:12 pm)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Fri May 17, 9:38 am)
Re: [LAU] Google TV device w/ AV out, Dan MacDonald, (Fri May 17, 9:52 am)
Re: [LAU] Google TV device w/ AV out, Patrick Shirkey, (Fri May 17, 10:31 am)
Re: [LAU] Google TV device w/ AV out, Jeremy Jongepier, (Fri May 17, 7:29 am)