My list of noticed driver issues

[Subsentient]

So obviously things aren't complete, but I thought I'd post a list of the bugs I'm seeing with PinePhone drivers right now, since I know some PinePhone kernel developers read this forum, and hopefully some people in ModemManager and Librem5's dev team too, since I use their "Calls" app.

This doesn't include stuff like the camera, which just isn't working anymore on recent kernels.
I'm using Fedora 32 with XFCE on a 5.7 megous kernel.

• Merely having the bluetooth kernel module loaded cripples wifi speed to an unusable point. I can get wifi working well by either not installing the firmware for the 8723cs bluetooth chip, or blacklisting the btrtl driver. Bluetooth works fine, but wifi drops down to around 30KB/s.
  
• Intermittent audio routing issues with phone calls. Sometimes there's no way to get audio without rebooting the modem entirely, other times the call audio will scream in my ear at distorted, extremely high volume levels. Sometimes it happens multiple times a day, other days it behaves fine.
  
• Being in CRUST sleep frequently eats text messages, not leaving a trace that they ever existed.
  
• Sometimes calls will wake the phone from CRUST sleep, but not actually trigger a ring. When this starts happening, rebooting the modem doesn't help, a full phone reboot is required.
  
• HDMI output over Type C has serious lag, even when the DSI touch panel is disabled. It's enough that the second hand on my digital clock can go slower than realtime.
  
• Touchscreen will occasionally start refusing to act on clicks although the cursor moves, as if there's another finger touching somewhere on the display, but there's
  not. I must reboot at that point, usually via ssh.
• Modem sends AT CMT message events that seem to trip up ModemManager during some outgoing calls, making ModemManager erroneously think the call failed, although audio will route fine. There is at that point no way to hang up a call short of powering down/rebooting the modem or the whole phone.
  
• GPS reception is very poor, may be fixable with drivers or a device tree change.
  
• Seems impossible to play two audio sources at once, the attempt will frequently crash both programs.
  
• Battery reads 100% as 92%, though this seems specific to the megous kernels.
  
• Battery will fully charge, then slowly discharge itself without charging again until I reconnect the charging cable.
  

Not sure on how much of this is in userspace (e.g. Xorg, ModemManager) or kernel module related.