I've looked thru quite a few postings that all seem to have usb mis-handling as the common issue, but no generally common solution.
20.04 had been running fine. Problems seemed to begin after upgrading to newer versions of Ubuntu (and Mint). So, why not drop back to 20.04 and stay there? Impacts workflow due to newer file formats and features. Also, I'd really like to solve this problem.
Just to rule out hardware issues, I've replaced: the motherboard (ASUS Prime 550-Plus), drive, wifi card (and even tried ethernet only), graphics card (Radeon to Nvidia), power supply, mouse and keyboard (went from logitech wireless to generic wired). The only hardware common to the two systems is the AMD Ryzen 5 2600X processor and memory. Memory diagnostics pass with zero errors. Ubuntu 22.04, 22.10, and 23.04, as well as Mint 21, have been installed clean. The issues seem common to both hardware configurations.
Slowing down of mouse movement and keyboard response (typing and nothing happens, to typing and long delay (2-10 seconds) to respond, to the expected response) seems to occur when:
- Chrome is active (crashpad-handler spawns ten or more processes when Chrome is running)
- a usb device, such as thumb drive, scanner, or radio (I'm an amateur radio type) is plugged into a usb port
- after typing for a period of time (works fine initially, then slowly degrades). A restart clears this (temporarily).
I've looked at dmesg for clues. The system monitor app helped identify Chrome as a contributing bad actor. And I really like using Chrome. System monitor doesn't seem to reflect high cpu use when things go south.
So, does anyone really know what's different between newer and older Ubuntu releases with respect to handling usb port activity? Did the way Ubuntu handles interrupts change? Was the usb driver module library changed substantially?
Memory leak of some sort? Interrupt handling? Malware not detectable with clamav? Temperature issues?
Constructive suggestions welcomed and much appreciated.
