OpenELEC Testbuilds


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by caravela » Thu Sep 20, 2012 2:45 pm
1 - turbo is based on idle % for the system, you might no be playing a mkv but something else might trigger it, for example doing a library scan...

2 - add hdmi_ignore_cec_init=1 to config.txt
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by liriel » Thu Sep 20, 2012 3:38 pm
How does one make use of the turbo feature? I didn't see it in the linked article.

I know how to overclock and overvolt in config.txt but don't know how to enable the turbo mode that dials things back when the chips get too hot.
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by mrspiffy » Thu Sep 20, 2012 8:35 pm
as noted here: http://elinux.org/RPi_config.txt#Overcl ... figuration

force_turbo=0

You'll need to set the upper bounds of turbo mode via the overclocking variables. so in your config.txt, you put:

force_turbo=0
arm_freq=1000
core_freq=500
sdram_freq=500
over_voltage=6

this will bounce your pi up to 1 Ghz under load and then back down to 700 when not under load.

NOTE: Your pi may not boot under these settings. Ive had some boards that I can overclock more than others. If it doesn't boot, retry while holding the shift key. Then edit the values down (using the chart on the above web page and try again.
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by jimsefton » Thu Sep 20, 2012 8:59 pm
Is "install from zip" broken in r11955? I installed it hearing iPlayer was fixed but I can't seem to install anything from the install from zip option in the menu?
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by milhouse » Thu Sep 20, 2012 9:06 pm
Build r11955 is using the "conservative" governor by default, not "ondemand" - maybe this explains why I'm seeing everything pegged with their clocks at maximum even when the Pi is idle (sitting the menu). Switching to ondemand using:

Code: Select all
echo ondemand >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor


produces the expected behaviour, with clock frequencies (and voltages) rising and falling according to load.

Unfortunately OpenELEC r11955 seems quite unstable - even in the menu - with settings that were rock solid in Raspbian (arm 1000/core 500/sdram 450/volts +4).
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by milhouse » Fri Sep 21, 2012 1:40 am
jimsefton wrote:Is "install from zip" broken in r11955? I installed it hearing iPlayer was fixed but I can't seem to install anything from the install from zip option in the menu?


Installing anything apears to be broken - can't install the IMDb scraper. No obvious error message - it just fails to install each time.
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by milhouse » Fri Sep 21, 2012 5:33 am
Testing overclocking with r11955 (even just 900/500/450/4, which is stable in Raspbian) and it's proving to be a bit of a nightmare. Seemingly stable overclocks (ie. r11955 plays movies fine, no instability etc.) result in the SD card corrupting itself. Select Reboot from the menu, and when OpenELEC restarts it fails to mount /dev/mmcblk0p2 due to "Invalid argument" - the full error is:

Code: Select all
mount: mounting /dev/mmcblk0p2 on /storage failed: Invalid argument


Running an fsck on the ext4 partition reveals a massively damaged filesytem that cannot be recovered.
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by caravela » Fri Sep 21, 2012 9:17 am
milhouse wrote:Running an fsck on the ext4 partition reveals a massively damaged filesytem that cannot be recovered.


I experienced similar issues with the filesystem, it is probably the mounting options that are not optimal.
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by dom » Fri Sep 21, 2012 9:53 am
milhouse wrote:Unfortunately OpenELEC r11955 seems quite unstable - even in the menu - with settings that were rock solid in Raspbian (arm 1000/core 500/sdram 450/volts +4).

Does quake run under raspbian?
Once you use the 3d hardware the power requirements go way up which you won't see in raspbian. You may be hitting the limit of your power supply, or a chip limit that only shows when power/temperature is increased.
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by milhouse » Fri Sep 21, 2012 10:03 am
dom wrote:
milhouse wrote:Unfortunately OpenELEC r11955 seems quite unstable - even in the menu - with settings that were rock solid in Raspbian (arm 1000/core 500/sdram 450/volts +4).

Does quake run under raspbian?
Once you use the 3d hardware the power requirements go way up which you won't see in raspbian. You may be hitting the limit of your power supply, or a chip limit that only shows when power/temperature is increased.


No, quake will reboot with pretty much any overclock, even quite moderate overclocking. I've got a 2A PSU (HP/Palm Touchpad) so it's probably the case of a less than stellar chip! When I put a link over the polyfuses I'll disable the current limit and see if that improves stability. The strange thing is I can watch a 1080p/DTS video without stutter now, but the filesystem gets trashed every time... annoying! :)
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by mrspiffy » Fri Sep 21, 2012 6:10 pm
milhouse wrote:Testing overclocking with r11955 (even just 900/500/450/4, which is stable in Raspbian) and it's proving to be a bit of a nightmare. Seemingly stable overclocks (ie. r11955 plays movies fine, no instability etc.) result in the SD card corrupting itself. .


Have you tried restoring your original overclock settings and disabling the dynamic overclocking and see if the filesystem is corrupted again?
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by b0x » Fri Sep 21, 2012 6:30 pm
corrupted file system here too after messing with ondemand settings. after failing to boot network properly (heat?) several times it finally came up. Wasn't holding my resolution at 1080p (1080i?) so I changed it and did a soft restart at which point it appears I have a destroyed sd card. failed to mount just as above... it's been so long since I've done this from scratch and don't even remember the steps ;-)
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by caravela » Fri Sep 21, 2012 7:03 pm
b0x wrote:corrupted file system here too after messing with ondemand settings. after failing to boot network properly (heat?) several times it finally came up. Wasn't holding my resolution at 1080p (1080i?) so I changed it and did a soft restart at which point it appears I have a destroyed sd card. failed to mount just as above... it's been so long since I've done this from scratch and don't even remember the steps ;-)

if you use Linux the easy way is to get the latest image, http://sources.openelec.tv/tmp/image/openelec-rpi/ ,and follow the card instructions at the end
http://wiki.openelec.tv/index.php?title ... spberry_Pi
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by Tavalin » Fri Sep 21, 2012 7:41 pm
I had the corrupted SD card issue back on page 25, no one seemed to care :cry:

On a more serious note, glad to see it's not just me that it's happening to! I've gone back to not overclocking for the time being.
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by b0x » Sat Sep 22, 2012 6:01 am
Sorry Tavalin,

I'd been away from the forum for a week or two and missed your plight. At least rebuilding with current 11974 has stayed up. I dumped my config.txt for the moment, and now I have to redo my setup of course :-(. Got rid of my image backups a month ago when things smoothed out and just worked for the most part. Updating via samba was working so well... Always fun being part of the beta experience.

Tavalin wrote:I had the corrupted SD card issue back on page 25, no one seemed to care :cry:

On a more serious note, glad to see it's not just me that it's happening to! I've gone back to not overclocking for the time being.
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by dom » Sat Sep 22, 2012 10:37 am
Tavalin wrote:I had the corrupted SD card issue back on page 25, no one seemed to care :cry:

On a more serious note, glad to see it's not just me that it's happening to! I've gone back to not overclocking for the time being.


There's more discussion here:
viewtopic.php?f=29&t=6201&p=179227#p179227
Try leaving the overclock in place, but editing core_freq back to 250. Report any results on the linked thread.
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by Penetratore » Mon Sep 24, 2012 8:06 am
I have in the config.txt only two lines (build 11955)

force_turbo=0
hdmi_ignore_cec_init=1


As for Turbo Mode, the pefromance now is worse then befor making this config file.
Question.
I read that the performance on some fixed OC setup (e.x. 950Mhz - CPU load 50-60%) is better then on standard (700mhz - CPU load 90%), can you tell me what is the best OC setup for openELEC?

As for Ignore CEC - it dosent work .. RPI is switching the "sources" at TV startup
Any ideas why?
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by texy » Mon Sep 24, 2012 8:13 am
Is AirPlay (audio only) still broken? Everywhere I read its stated that its a xbmc bug, but here I read its been fixed in xbmc :
http://forum.xbmc.org/showthread.php?ti ... ht=AirPlay

Texy
Various male/female 40- and 26-way GPIO header for sale here ( IDEAL FOR YOUR PiZero ):
https://www.raspberrypi.org/forums/viewtopic.php?f=93&t=147682#p971555
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by caravela » Mon Sep 24, 2012 10:28 am
Penetratore wrote:I have in the config.txt only two lines (build 11955)

force_turbo=0
hdmi_ignore_cec_init=1


As for Turbo Mode, the pefromance now is worse then befor making this config file.
Question.
I read that the performance on some fixed OC setup (e.x. 950Mhz - CPU load 50-60%) is better then on standard (700mhz - CPU load 90%), can you tell me what is the best OC setup for openELEC?

As for Ignore CEC - it dosent work .. RPI is switching the "sources" at TV startup
Any ideas why?


you need to supply some "turbo" settings something like arm_freq=840, core_freq=375, sdram_freq=450 works fine for me. i have a dts and ac3 avr decoder, so i don't need anything higher.

I have the cec init line as well and it works in my case...
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by Salamander » Mon Sep 24, 2012 3:05 pm
Salamander wrote:
Salamander wrote:
masterluke wrote:Can anyone else confirm a problem playing back the file under Openelec via the headphone jack or is it just me?

I'm having same issue with HDMI audio. I'll see if I can try your clip tonight.
Have you tried with r11949?

Confirmed on r11949 published at testbuilds. Buzz sounds like distant, on the background. It's like if at the down-mixing process this channel is assigned a lower volume. It sounds OK being played on the TV or PC. Have tried many different audio settings (speaker configuration 2.1, 2.0, 5.1, boost volume level on downmix, DTS/AAC capable device) to no avail. Also, video ends 1/2 seconds earlier.

Another issues I have found so far:
- Favourites don't launching media streams. I've tried with audio add-on's Radio and ListenLiveEU. If I add a favourite for a category, it opens with no problem, but if the favourite is a radio station it will not play at all.
- USB devices keep reconnecting when extracted, thus preventing a "save extraction". LED at the device blinks for a split second, so you have to be extra quick to push the button at the remote and then unplug the device.

BTW, just overclocked my PI and now menus and general operation is much more fluent. My settings are:
arm_freq=900 # default 700
core_freq=450 # default 250
sdram_freq=500 # default 400

Now CPU Usage when idle is about 50%, with default settings it was 90%. Still have to try sdram_freq=600 ;)
Responsiveness have increased a lot, but still miss some feedback at some point, when you push a button at the remote but nothing happens on screen after some seconds. RSS and Wheather are off.


Many thanks for your help. Work made by dev teams at XBMC, OpenELEC and RPIF is plain awesome!

Regarding that sound affair, this discussion sounds related to me: https://github.com/huceke/omxplayer/pull/55
Let's see if future versions of omxplayer solve this sound issue.
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by akira62 » Mon Sep 24, 2012 10:00 pm
Just for Info.

I just installed the latest Build from Openelec. Turbo is on.

With Ethernet I got reboot every minute.

With my WLan USB Dongle It works stable. Still I got a lot of reloads with HD Movies (720p and 1080p) but the reboot was not triggert every minute.
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by masterluke » Tue Sep 25, 2012 7:24 am
Salamander - we already established in this thread that this problem doesn't exist in the oxmplayer tested by Dom. I am guessing that openelec need to integrate a more recent oxmplayer into openelec to fix this. Perhaps someone can confirm which version is in openelec so we can compare. I have no idea how to check myself.
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by rick19011 » Wed Sep 26, 2012 11:14 am
How do I disable subtitles in movies by default?
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by milhouse » Wed Sep 26, 2012 11:19 am
rick19011 wrote:How do I disable subtitles in movies by default?


Start a movie, go into "Audio - Settings", untick "Enable subtitles", click on "Set as default for all movies".

Pretty daft for this to be enabled by default, but there you go.
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by rick19011 » Wed Sep 26, 2012 11:48 am
milhouse wrote:
rick19011 wrote:How do I disable subtitles in movies by default?


Start a movie, go into "Audio - Settings", untick "Enable subtitles", click on "Set as default for all movies".

Pretty daft for this to be enabled by default, but there you go.

How do I get up the menu to go to audio settings? tried holding the pause button but no luck.. have a Toshiba TV
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