https://bugzilla.kernel.org/show_bug.cgi?id=217242 --- Comment #15 from Hunter M (miller.hunterc@xxxxxxxxx) --- Created attachment 304127 --> https://bugzilla.kernel.org/attachment.cgi?id=304127&action=edit trb values Found what (possibly) looks to be a similar issue at https://github.com/raspberrypi/linux/is … 1241972882. The comment I've linked has a similar scenario (in that the single serial port communication occurs frequently - the comment stated the serial communication frequency was every 0.2s; the communication I've implemented is every 0.15s). Yesterday I had started the serial communication process and left it overnight to see the trb values by performing for d in /sys/kernel/debug/usb/xhci/0000:01:00.0/devices/*/*; do if [ -d "$d" ]; then cd $d; echo "${d/?*\/devices\//}: $(wc -l trbs)"; fi done However, when coming back this morning and attempting the above command, the computer froze and either the software or hardware watchdog kicked in and restarted the computer (journalctl logs did not print out before the reboot occurred, so unfortunately I don't have any information on what happened). I went ahead and re-performed the test today reducing the sleep time in between serial write calls from 0.15s to 0.05s. With that, the ttyACM ring size did expand considerably. The values I was able to obtain until a power outage occurred which stopped my test are attached. Further information: utilizing Microchip MCP2200 USB to UART converter instead of FTDI (though this should not make a difference, pointing it out just in case). -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
