I have a Dell XPS 9370 connected to a Dell Thunderbolt Dock TB16. Attached (via USB) to the latter I have my mouse and keyboard. Both freeze after some (random) time of usage (from minutes to hours) with no messages neither in dmesg nor in /var/log/messages or /var/log/syslog. The only way to reactivate the frozen USB connection is to detach and reattach the affected peripheral (usually it is the mouse that freezes and the keyboard remains active but sometimes it is the opposite). I tried disabling USB autosuspend entirely (usbcore.autosuspend=-1 in the kernel command line) but the problem remains. I installed Windows in my PC only to update all the drivers and firmware (i.e., the thunderbolt firmware) using the packages provided by dell. Again, with no success. I have the latest BIOS istalled (1.8.1). I compile the kernel myself, from the latest vanilla kernel (using kernel-package to build a debian package). I am currently running latest stable kernel 5.0.4. The problems also affects latest debian SID kernel (4.19.28). I understand I am not helping much in identifying the source of the problem but I do not know how to help better, especially because the problem is hard to reproduce. If anyone could give me any suggestion on how to better investigate the source of the problem (i.e., increasing logging verbosity or any other thing that I could do), I would be very happy to help. The issue is very annoying (I have to detach/reattach my keyboard/mouse at least a couple of times per day). Thanks in advance.
