Control: forcemerge 986995 988207 Hi, On Fri, May 07, 2021 at 09:04:19PM +0200, Andrii Beregovenko wrote: > Package: src:linux > Version: 5.10.28-1 > Severity: important > X-Debbugs-Cc: j...@jet.kiev.ua > > Dear Maintainer, > > Recently I've upgraded from stable to upcoming stable. > The default kernel has been updated from 4.19 to 5.10 as well. > Immediatelly I discovered my builtin 3G modem stoped working. > > Also several other devices stoped working as well: > * Some Arduino boards > * USB tethering from my smart phone (via USB cable) > * Several embedded devkits > * Some special UAV hardware(flight controllers like pixhawk, pixracer) > > The similar point of all of them they are using cdc_acm driver for USB > connection > handling. The device is getting registered with no problem. > However as soon as I'm trying to open (or NetworkManager tries) > corresponding serial device following message appear in the kernel logs: > > acm_port_activate - usb_submit_urb(ctrl irq) failed > > ...and corresponding serial port is not opening and is unaccessible. > > Reconnecting USB cable(in case of external device) does not help. > > Using kernel from current stable(4.19) solves problem completely and all > the devices works properly.
This should be the same as #986995. Regards, Salvatore
