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| PWM whine near earpiece in low signal phone call and loud sound sent to the other end |
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Posted by: vortex - 05-17-2021, 05:47 PM - Forum: PinePhone Hardware
- Replies (29)
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For reference, my phone is a Beta Edition Convergence PhonePhone (1.2b hardware). I am running Mobian with the following modifications:
- Running 5.11 kernel
- Flashed the anx7688 with the latest firmware
- Installed crust-firmware package
In all of this, I was calling a land line.
Today, I had my first chance to see the PinePhone in action with phone calls in a location with very poor reception. Many places there have no reception. Many other places a phone has to drop to 2G. 4G in a few places, though it is marginal. This was the pattern with my old phone (Nexus 5), and is the pattern with my new PinePhone. At first glance, it looks like my PinePhone is doing a bit better reception wise than my Nexus 5.
Yesterday, I called the landline from a location with good reception and there were no problems. I also did the same earlier tonight at the same location to check, and had no problems.
But in the location today with bad reception, there were major problems that were strongly correlated with the reception.
On my end, there was a loud sound coming from inside the PinePhone case near the earpiece. The sound seemed like PWM whine. So I think it is a switching power supply and a capacitor combination. It quite bad in one location. I moved to another location with better reception and it decreased some. I ended the call and tried again in a location outside with slightly better and the sound was a lot quieter, and I could make it slightly quieter by rotating myself so it would aim in certain directions. My Nexus 5 makes a similar sound but much quieter even in poor reception, and has a similar pattern.
On the other person's end was much worse. They said a very loud sound was coming through on their end which made it even harder to understand me than the sound on my end made it hard to understand them, though my voice was coming through better than on my old Nexus 5 except for the added loud sound. The intensity of the sound decreased as the signal quality improved. From how they described the sound later, it seems like it might have been RF pickup in the microphone line or the sound connection line to the modem. Tomorrow, we are going to attempt to record the sound on their end so I can listen to it and try to figure out more.
Based on the pattern, I think that the sound on my end and the pickup causing loud sound to be transmitted to the other end are due to the increased transmission power as the signal quality decreases. In the worst reception area, the modem is operating at maximum and the problem is at its worst.
For the PWM whine on my end, I am doubtful there is a software solution. Only possibility would be if the PWM frequency is controllable from software. But the PWM whine on my end isn't too terrible (it is tolerable). For the noise transmitted to the other end, it is possible that the settings of the modem, CPU, and sound hardware may have some tangible effect; but I don't know. There is more likely to be a solution, though than for my end.
Hardware wise, assuming I am not the only one with this problem and that the electronics causing it are not inside the modem itself, it might be possible to reduce by finding the particularly switching supply and changing it to a different one as well as changing the capacitor to one that will make less noise (hopefully the capacitor is easy to get to because then it would be possible for the brave to desolder it and solder a new one on). That by itself my reduce the problem to no longer be an issue. The RF pickup can probably also be reduced in other ways.
Anyone have any ideas on this and/or have experienced it?
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| Fraud Warning on purchase attempt? |
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Posted by: kriscj - 05-17-2021, 10:28 AM - Forum: General
- No Replies
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Hello, Pine community.
I attempted to buy a pinephone this weekend (mid-May, 2021) using my credit card and was declined, and knowing my finances are OK, asked the bank the reason for the decline. They stated that the purchase was blocked because the vendor has a history of fraud reports against them.
Now I'm not sure what to do... I could probably go through PayPal, but SHOULD I? I love the idea of the pine universe of devices and am an IT guy, so I'm a good early adopter, but this fraud warning has me really worried.
Interested to hear your experiences and opinions on the matter, please?
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| OpenBSD 6.9 install |
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Posted by: StickyPine - 05-17-2021, 02:30 AM - Forum: BSD on Pinebook Pro
- Replies (18)
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Hello,
I attempted to install OpenBSD 6.9 on the PineBookPro. I essentially followed those steps https://github.com/ndhwyd/roc-rk3399-pc_openbsd and changed rk3399-roc-pc.dtb with rk3399-pinebook-pro.dtb.
When starting the machine, the booting process halts with the following message:
Code: bwfm0: failed loadfirmware of file brcmfmac43456-sdio.rockchip,rk3399-evb.bin
(I have the same issue when using rk3399-roc-pc.dtb)
Has anyone experienced something similar or would know how to solve this ?
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| PINE A64 AUDIO DAC POT BOARD On A64 LTS w/ Armbian FOCAL |
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Posted by: A64mediaplayer - 05-16-2021, 11:43 AM - Forum: SOEdge Hardware
- No Replies
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Hi Folks!
Setup an A64 LTS board with Armbian focal and trying to get the Pine DAC POT running. Any insight into the method to make this work?
Is it via dt-overlay like in raspian ... or something else? I am assuming this is possible since the Volumio image claims to work ...
Thanks!
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| no unlock screen (plasma mobile) |
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Posted by: dieselnutjob - 05-16-2021, 08:39 AM - Forum: Manjaro on PinePhone
- Replies (6)
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I just reflashed Manjara plasma mobile and then did pacman -Syu
Now I can ssh into the phone but I can't get an unlock screen to appear.
If I reboot the phone sometimes the unlock screen briefly flashes on just before the KDE start logo think.
What should I do?
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| Which OSs have GPU acceleration and which don't? |
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Posted by: dieselnutjob - 05-16-2021, 06:14 AM - Forum: PinePhone Software
- No Replies
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I'm new to Pinephone and just having an initial play.
I started with the default KDE Manjaro but after an experimental connection to a TV with the docker it seems to have messed it up.
I saw a few posts that said Mobian was the most stable.
I tried it yesterday and quite like it, but it seems more laggy than KDE Manjaro.
Is that something to do with GPU aceleration?
Looking at the "PinePhone Software Releases" wiki doesn't seem to say which OSes have GPU acceleration and which don't.
I notice that Manjaro actually has three versions, Phosh, Plasma Mobile and Lomiri. Is the GPU acceleration present in all three?
thanks, DNJ
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| Bluetooth audio stalling (maybe the whole phone) |
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Posted by: motox6 - 05-15-2021, 10:01 PM - Forum: Mobian on PinePhone
- Replies (1)
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I have a farm with Wifi in various spots. It is the same ESSID everywhere but there are areas with no coverage. There is no cellular coverage.
The following is repeatable behavior.
I often listen to podcasts via bluetooth using the 'podcasts' app and playing from files loaded locally on the phone.
If I am listening to a program as I drive and I transition from the Wifi coverage area to a non coverage area the blue tooth stutters (it cuts in and out). It seems like the Wifi losing its connection interferes with the ongoing bluetooth audio.
The audio is not stalling but is lost.
Eventually the bluetooth audio recovers and when I enter an area with Wifi a similar stuttering occurs.
The behavior is very repeatable and happens every time I make the drive while listening to a podcast.
Since the behavior is repeatable is there something I might look to to help identify what is going wrong?
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| Pinebook Pro audio recording with Jack |
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Posted by: rfm83 - 05-15-2021, 05:31 PM - Forum: General
- No Replies
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Hello,
I am writing with a question regarding recording audio on the Pinebook Pro with Jack. I'm currently trying to record electric guitar tracks on Ardour and using the Guitarix application which uses Jack audio. My setup is an electric guitar with a usb/guitar line hybrid cable plugging directly into the usb port on the Pinebook Pro. The sound of a clean guitar is fine but when I use a distortion plugin on Guitarix there is a lot of noise and cracking sounds coming out from the speakers. It's not just a slight noise, it's actually an unbearable high pitch noise which makes the guitar sound disappear. I have tried changing the settings on Jack such as Sample Rate, Frames/Period and Periods/Buffer, but nothing seems to help. I am wondering if this problem is due to Jack and its configuration or the Pinebook Pro hardware is not suitable for recording audio.
I appreciate any input from someone who has tried this or has any idea of what could be the issue here.
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