I was using 2020-11-23 image on my Raspi 4 for a long time without any issue. However, after I “sudo apt update && upgrade”, jack cannot start correctly. Is there any compatibility issue?

Update: I installed the RT kernel via Patchbox which solved the jack issue. However, I lost the function of all 4 USB ports. FYI: I’m using a 4G ram version of Raspi-4. Thanks

I also have this problem, I just updated and after restarting I lost communication with my 4 USB ports. I also noticed an increase in CPU load and glitches even increasing the latency in Jack’s configuration. I will try to search for something on other forums related to tou, but first I will try t…

It seems to be the kernel issue, and here’s a temporary solution: [image] Missing USB ports with realtime kernel on pi4 4gb Patchbox OS I have had the same problem with a Rpi 4 4Gb using PatchOS for Modep: after an upgrade earlier this month, I ended up with no USB devices…

It is definitely an issue with the kernel, I just installed the regular version via ‘patchbox-config’ and everything worked perfectly, except for the jack, still trying to understand, besides I’m having overheating problems, I have to figure out how to solve this. Thanks for the help, my USB is wor…

The realtime kernel branch was not updated for 8GB Raspberry Pi. If anyone gets it working with the 8GB version, please let us know. :slight_smile:

Just an update on the subject: I reinstalled the last stable image of Patchbox OS and everything went back to working as expected again. I believe the problem is not with the kernel itself. There is no recommended kernel update, but it does have Jack (Blokas build) and driver firmware. I didn’t perf…

Ok, I thought you might try applying the RT patch on some up to date kernel source version. :slight_smile:

Yeah, after several trial and error, I went back to the original 2020-11-23 image, which seems to be the only stable one for Raspi-4 4GB. @rafaeletc : For the RT kernel, other than the USB port problem, I also got the same problem when using Pisound as the audio interface. [image] rafaeletc: in…

Interesting, everything is ok here. Did you update via APT? I’m using the following Jack configuration: samplerate 48000, buffersize 128, period 2 (with PiSound as driver). I just updated Patchbox using the ‘patchbox-config’ command and PiSound using the ‘pisound-config’ command [Captura de te…

Jack failure after upgrade -- Raspi 4

Patchbox OS

Bridgee February 28, 2021, 5:12am 4

It seems to be the kernel issue, and here’s a temporary solution:

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Jack failure after upgrade -- Raspi 4

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