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| Sound coming out both speakers and headphones |
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Posted by: eclay - 07-06-2017, 09:15 AM - Forum: Pinebook Hardware and Accessories
- Replies (8)
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Hello,
I've noticed that when I attempt to plugin headphones to my pinebook and play a video that sound still comes out the internal speakers and the headphones. Is this how it's supposed to work? Any ideas how to troubleshoot or fix this?
I'm running the default ubuntu mate on it and I poked around in the sound settings and didn't find anything there that looked like the answer to this problem.
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| HDMI Compatability |
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Posted by: rahlquist - 07-06-2017, 08:19 AM - Forum: General Discussion on PINE A64(+)
- Replies (5)
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So, its been a good while. The question is, has anything been done with any of the OS that has increased HDMI compatibility, or is it still shi%t? The main reason I bought the Pine64 was to use it as a playback device with Plex since it touted its 4k compatibility, and since even a Pi can work with nearly all HDMI devices I expected this to work, but every time I have tried only one Tv/Monitor in my house out of 5 works.
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| GPIO LED blinker using SYSFS on the Rock64 |
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Posted by: MarkHaysHarris777 - 07-06-2017, 03:41 AM - Forum: General Discussion on ROCK64
- Replies (20)
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In the above pic I'm blinking an LED at physical pin(16) of the Rock64, GPIO3_A5, on the PI-2 bus;
... to use the sysfs method of setting the pin on|off one must first calculate the gpio# using the following:
( bank_num * 32 ) + ( pad_name * 8 ) + pad_num
where pad names = {A:0, B:1, C:2, D:3}
In the above example the bank_num is 3 , pad_name is 0*8, and the pad_num is 5 , so:
( 3 * 32 ) + ( 0 * 8 ) + 5 = 101
The following steps are used to set the gpio pin on|off:
1) sudo -i
2) echo 101 > /sys/class/gpio/export
3) echo out > /sys/class/gpio/gpio101/direction
4) echo 1 > /sys/class/gpio/gpio101/value <--ON
5) echo 0 > /sys/class/gpio/gpio101/value <--OFF
The following codes will blink gpio101 at pin(16), GPIO3_A5: blinker.sh and sysled.sh are closely related scripts. The former is a controlled loop, and the latter is a forever running loop; both are useful. Compare the two script and notice that they are almost identical.
blinker.sh
Code: #!/bin/sh
echo $1 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio$1/direction
COUNTER=0
while [ $COUNTER -lt $2 ]; do
echo 1 > /sys/class/gpio/gpio$1/value
sleep .35
echo 0 > /sys/class/gpio/gpio$1/value
sleep .65
COUNTER=$(($COUNTER+1))
done
echo $1 > /sys/class/gpio/unexport
To run blinker enter two parameters; the first the gpio#, and the second the number of times you want it to blink!
sudo ./blinker.sh 101 7
(will blink gpio101 seven times)
sysled.sh
Code: #!/bin/sh
echo $1 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio$1/direction
COUNTER=0
while [ $COUNTER -lt 10 ]; do
echo 1 > /sys/class/gpio/gpio$1/value
sleep .35
echo 0 > /sys/class/gpio/gpio$1/value
sleep .65
done
To run sysled:
sudo -b ./sysled.sh 101
(will strobe gpio101 forever)
( remember to cd into the working directory where you place the script )
( also, don't forget to make the script executable: chmod 0754 sysled.sh )
In the pic above I have attached the grey wire at ground pin(14), and the orange wire at pin(16).
The anode of the LED is attached at the orange wire, and the cathode of the LED is attached to the grey wire through the ballast resistor , which is 330 ohms. The LED is a low power (5-7ma) 3mm standard LED.
I have so far tested the blue pins ( see chart ) and the green pins. DO NOT use the blue pins if you're using the micro SD card ! If you're booting from the eMMC module (as I am) then the blue pins and most of the green pins are available to you;
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| Throttling? |
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Posted by: genosensor - 07-05-2017, 10:12 PM - Forum: Rock64 Hardware and Accessories
- Replies (8)
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I'm looking at this board as an upgrade to my Hardkernel C2.
Even with its large heatsink, the C2 reaches 72C under load, in my experience.
(but it does not throttle!)
The Rock 64 has similar power dissipation in the same form factor.
Can anyone recommend case and/or heat sink for it that will keep it from throttling under sustained load?
Thanks!
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| Issues booting remixOS image |
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Posted by: remi - 07-05-2017, 11:57 AM - Forum: Android on Pinebook
- Replies (2)
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Hi,
I have sucessfully booted android 7.1 from an external sdcard (after decrompressing the 16gb sdcard boot image using etcher), just by inserting the SDcard in the reader port and powering up the laptop, without even removing the internal eMMC which contains ubuntu MATE that came from the factory.
However I cannot get the remixOS image, decompressed to the same SD card using etcher, to boot. Upon powering up the laptop, the power led just blinks forever and nothing happens. I have tried to activate the special boot mode by pressing the power button repeatedly right after powerup with no success.
Is there anything I am missing ?
Regards
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