https://bugzilla.kernel.org/show_bug.cgi?id=212725 Bug ID: 212725 Summary: USB CDC ACM device stop working Product: Drivers Version: 2.5 Kernel Version: 5.11.15 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: stefan@xxxxxxxx Regression: No When trying to use USB CDC ACM devices (open using screen) opening fails and the kernel dmesg shows the following error: kernel: cdc_acm 1-3.3.3:1.0: acm_port_activate - usb_submit_urb(ctrl irq) failed This happens with STM32 microcontroller based device as well as a Segger JTAG adapter, so it seems not device related. The issue must have been introduced recently (within the last month) as those devices used to work previously. I can reproduce the issue also with latest LTS kernel release 5.10.31. Builds: - 5.10.31-1-lts - 5.11.15-arch1-2 -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
