Revpi Compact freezes with USB devices

[sherifeid]

Hello, we have a few revpi compact devices in house and they all exhibit the same problem
The revpi always hangs after a while when USB devices are hooked, we only hook USB-RS232 (FTDI) cables
kernel.log doesn't show much (I'll attach one later)
I looked at viewtopic.php?f=17&t=1841, ran apt update, after update the problem persists
kernel is 4.19
anything else we can do to try to solve the problem?

thanks

[nicolaiB]

Hi sherifeid,

please share the kernel log of the affected system. Which image version do you use?

Nicolai

[sherifeid]

Thanks Nicolai, for some reason I can't attach files to this to this message
you can access the kern log files

https://drive.google.com/drive/folders/ ... sp=sharing

the devices came flashed with Buster, we didn't do any flashing

here's the output of

Code: Select all

uname -a

Code: Select all

Linux mp-pvs1-B4 4.19.95-rt38-v7 #1 SMP PREEMPT RT Tue, 22 Jun 2021 14:13:31 +0000 armv7l GNU/Linux

[rheeres]

I seem to have the same problem, with a LucidControl DI4 digital IO module (https://www.lucid-control.com/product/l ... sb-module/) connected through USB. If I don't interact with the module, the revpi compact works fine, but when communicating with that particular USB device, the system hangs within ~30 mins. I did not find any problems in log files and I also have an FTDI device and a ch341-uart converter which give no problems at all. I am on the buster image:

root@RevPi11079:/home/pi# cat /etc/debian_version
10.11
root@RevPi11079:/home/pi# uname -a
Linux RevPi11079 4.19.95-rt38-v7 #1 SMP PREEMPT RT Tue, 09 Nov 2021 08:04:06 +0000 armv7l GNU/Linux]

Snip of the dmesg log with connected usb devices:

[ 12.215299] usbcore: registered new interface driver usbserial_generic
[ 12.221703] usbserial: USB Serial support registered for generic
[ 12.247730] usbcore: registered new interface driver ftdi_sio
[ 12.247830] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 12.248051] ftdi_sio 1-1.3:1.0: FTDI USB Serial Device converter detected
[ 12.248263] usb 1-1.3: Detected FT232RL
[ 12.249359] usb 1-1.3: FTDI USB Serial Device converter now attached to ttyUSB0
[ 12.401413] cdc_acm 1-1.5:1.0: ttyACM0: USB ACM device
[ 12.415027] usbcore: registered new interface driver cdc_acm
[ 12.415038] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 12.966423] usbcore: registered new interface driver ch341
[ 12.971211] usbserial: USB Serial support registered for ch341-uart
[ 12.975475] ch341 1-1.4:1.0: ch341-uart converter detected
[ 13.005596] usb 1-1.4: ch341-uart converter now attached to ttyUSB1

The problematic device is on ttyACM0. I suspect a bug in the cdc_acm driver might be to blame, though I'm not sure where (I see no obvious candidate in https://github.com/torvalds/linux/commi ... /cdc-acm.c).

I think it would be worthwhile to try a more recent kernel/driver version. Would it be possible to build an image with a more recent kernel? (or provide a package with a more recent kernel). I see that Raspberry Pi OS 2021-05-07, on which this image is based, comes with 5.10.17, but I assume the 4.19.95-rt38 kernel has some specifics for the RevPi.

Other suggestions are of course also welcome!

Thanks and regards

[Christoph.b]

Hi,
I think that we have the same problem. Our Compact was running for about 80 days and suddenly it stopped working .

@ nicolaiB is there a fix in work?

[nicolaiB]

Hi rheeres

I seem to have the same problem, with a LucidControl DI4 digital IO module (https://www.lucid-control.com/product/l ... sb-module/) connected through USB. If I don't interact with the module, the revpi compact works fine, but when communicating with that particular USB device, the system hangs within ~30 mins. I did not find any problems in log files and I also have an FTDI device and a ch341-uart converter which give no problems at all. I am on the buster image:

I don't know the LucidControl devices, but this sounds like an issue with the LucidControl device / drivers, especially when the FTDI and CH341 are working. Have you already asked the manufacturer about known issues with kernel 4.19?

I think it would be worthwhile to try a more recent kernel/driver version. Would it be possible to build an image with a more recent kernel? (or provide a package with a more recent kernel). I see that Raspberry Pi OS 2021-05-07, on which this image is based, comes with 5.10.17, but I assume the 4.19.95-rt38 kernel has some specifics for the RevPi.

Yes, the 4.19.95-rt39 Kernel contains some RevPi specific patches, so the stock raspberry Kernel won't work. We are currently working on a Kernel 5.10 which contains all patches, but don't have any release date yet. You can try to build the kernel at your own risk with our kernelbakery (https://github.com/RevolutionPi/kernelb ... .10/README).

Nicolai

[nicolaiB]

Hi Christoph

I think that we have the same problem. Our Compact was running for about 80 days and suddenly it stopped working .

Without any logs or error messages this can be caused by a lot of different things. Do you have more details?

Nicolai

[Christoph.b]

the part of the kern.log file.

Jan 1 19:10:25 RevPi6511 kernel: [6913652.581365] piControl: piControl i/o: missed 1 cycles
Jan 1 19:10:51 RevPi6511 kernel: [6913678.074307] piControl: piControl i/o: missed 2 cycles
Jan 1 19:11:52 RevPi6511 kernel: [6913739.621837] piControl: piControl i/o: missed 1 cycles
Jan 1 19:12:16 RevPi6511 kernel: [6913763.074822] piControl: piControl i/o: missed 2 cycles
Jan 1 19:13:41 RevPi6511 kernel: [6913848.075335] piControl: piControl i/o: missed 2 cycles
Jan 1 19:14:39 RevPi6511 kernel: [6913905.962490] piControl: piControl i/o: missed 8 cycles
Jan 1 19:15:02 RevPi6511 kernel: [6913929.062899] piControl: piControl i/o: missed 1 cycles
Jan 1 19:15:06 RevPi6511 kernel: [6913933.075893] piControl: piControl i/o: missed 3 cycles
Jan 1 19:18:32 RevPi6511 kernel: [6914138.984188] piControl: piControl i/o: missed 1 cycles
Jan 1 19:19:21 RevPi6511 kernel: [6914188.077496] piControl: piControl i/o: missed 3 cycles
Jan 1 19:20:40 RevPi6511 kernel: [6914266.985029] piControl: piControl i/o: missed 1 cycles
Jan 1 19:20:46 RevPi6511 kernel: [6914273.078052] piControl: piControl i/o: missed 2 cycles
Jan 1 19:21:24 RevPi6511 kernel: [6914311.825084] piControl: piControl i/o: missed 17 cycles
Jan 1 19:22:11 RevPi6511 kernel: [6914358.078563] piControl: piControl i/o: missed 2 cycles
Jan 1 19:23:36 RevPi6511 kernel: [6914443.079078] piControl: piControl i/o: missed 2 cycles
Jan 1 19:25:01 RevPi6511 kernel: [6914528.079616] piControl: piControl i/o: missed 2 cycles
Jan 1 19:26:26 RevPi6511 kernel: [6914613.080138] piControl: piControl i/o: missed 1 cycles
Jan 1 19:27:51 RevPi6511 kernel: [6914698.080629] piControl: piControl i/o: missed 1 cycles
Jan 1 19:30:58 RevPi6511 kernel: [6914885.639245] piControl: piControl i/o: missed 6 cycles
Jan 1 19:32:47 RevPi6511 kernel: [6914994.030298] piControl: piControl i/o: missed 1 cycles
Jan 11 08:22:44 RevPi6511 kernel: [ 0.000000] Booting Linux on physical CPU 0x0
Jan 11 08:22:44 RevPi6511 kernel: [ 0.000000] Linux version 4.19.95-rt38-v7 (admin@kunbus.de) (gcc version 8.3.0 (Debian 8.3.0-2)) #1 SMP PREEMPT RT Tue, 22 Jun 2021 14:13:31 +0000
Jan 11 08:22:44 RevPi6511 kernel: [ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
Jan 11 08:22:44 RevPi6511 kernel: [ 0.000000] CPU: div instructions available: patching division code
Jan 11 08:22:44 RevPi6511 kernel: [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Jan 11 08:22:44 RevPi6511 kernel: [ 0.000000] OF: fdt: Machine model: Raspberry Pi Compute Module 3 Plus Rev 1.0

[Christoph.b]

@ nicolaiB could you see anything in the log

[nicolaiB]

No, the snippet looks really short. Could you please share the full log file?

Nicolai