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Milhouse
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2012-12-13, 02:46
(This post was last modified: 2012-12-13, 02:48 by Milhouse.)
Edit: I can boot Beta 5 all the way up to sdram_freq=499, but as soon as I try to use sdram_freq=500 the Pi will fail to boot (2-3 flashes of green LED, then nothing).
This same Pi has been 100% stable with sdram_freq=600 up to and including Beta 3 - something iffy in the post Beta 3 firmware/kernel?
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2012-12-13, 14:26
(This post was last modified: 2012-12-13, 14:51 by tuxen.)
The same here with beta 3 I had to set the sdram from 500 and down to 450 otherwise it stayed at the color gradient screen. I think I wrote it longer back in this thread to notify that something changed in the firmware. I have not tryid edging up to 499 but it could very well end in same result as yours. But now you have you answer.
Edit: I can also confirm that the same "problem" happened once during the summer but got fixed.
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Milhouse
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2012-12-13, 14:55
(This post was last modified: 2012-12-13, 14:58 by Milhouse.)
In the context of streaming, what's a "bigger" 1080p file?
I'm able to watch >18GB BluRay raw rips (VC-1, 22Mbps overall bit rate) without a problem on a Pi with its wired 10/100 Ethernet-over-USB NIC. Over NFS, watching this type of movie doesn't even utilise 50% of the Pis eth0 capacity, typically about 3.5MB/s, although it does sometimes hit 5MB/s (50% utilisation) when starting the movie.
So I have to ask, what benefit is there to be had from this AX88178 Gig NIC, as I'm not sure the Pi needs it or would even be able to make use of it (could the Pi really handle a greater than 10MB/s stream?)
In Beta 5 (as in Beta 3), the "Info" button on the remote is still not functioning in the "Movies" view. It does however now work in TV Shows and Music, which is an improvement on Beta 3.
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Milhouse
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Is there a link for this Terminator 2 file? DTS-MA and Dolby TrueHD is not playable (yet) on the Pi, expect extremely choppy performance.
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Milhouse
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2012-12-13, 17:19
(This post was last modified: 2012-12-13, 17:22 by Milhouse.)
Yes, that file buffers over XBMC NFS mounts in Beta5, but it's only utilising 25% of the network (2.5MB/s), and the CPU is pegged at 100% so I doubt a Gig NIC will help here unless it can somehow reduce the CPU load.
The file plays fine from SD card (Class 10, Transcend) as the Pi doesn't have to expend CPU cycles in order to service the USB interrupts caused by the network traffic, although even from SD card the Pi (overclocked 1000/500/600) will come close to exhausting the audio queue so only narrowly avoids a stutter. When playing back from the network, the audio queue does become exhausted resulting in a stutter/buffer, simply because there isn't enough CPU available to get the data in time from the network and also decode the video/audio.
It's not really a case of the Pi NIC having insufficient bandwidth to play the movie, more a case of ethernet-over-USB being a rather inefficient (but cheap) design from a CPU loading perspective, and I doubt a different USB NIC will help here, but do let us know how you get on if you take this route.
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Hey goujam
Do you use Heatsinks on your overclocked RPI?