On 12.10.2020 17:18, Thomas George wrote: > 10/12/20. Mouse working perfectly since reboot on 10/6/20 but this > morning no response from keyboard. Tried ctl-alt-f1 and ctl-alt-f7 but > no response. Not able to switch workplaces. Continued working in the > current workspace using the mouse only. Verified mouse and keyboard > batteries both at 50%. After several switches between open pages the > keyboard recovered so I could write this. > > All this on Ubuntu Studio. Again an intermittent problem. Keyboard > just stopped working again and recovered after several minutes. > > Has anyone else experienced this? > > On 10/6/20 2:27 PM, Thomas George wrote: >> Mouse clicks don't work though mouse moves the pointer. >> >> This happens infrequently, once in a day or two. I am using two pc's, >> a raspberrypi and a Ubuntu Studio each with its own Logitech usb >> keyboard and have experienced this problem on both systems. >> >> I have tried to recover with various keyboard entries - ctl-c, cti-d, >> esc, q and by disconnecting and reconnecting the keyboard. Nothing >> but a reboot solves the problem. I use ctl-alt-f1 to open a >> terminal, sign in and enter shutdown -r now to do this. There is no >> problem with the keyboard. >> >> Is this a known problem? Is there a known solution? >> >> > Taking into account that both devices now exhibit similar behavior, I'd start by looking into USB power saving functions [1] and try to disable them to see if it solves the problem. That could be done by setting "autosuspend" parameter of kernel module "usbcore" to a negative integer value (-1). You can change it temporarily on running system by typing: sudo echo -1 > /sys/module/usbcore/parameters/autosuspend and re-pluging USB device so new settings will be taken into account.
[1] https://www.kernel.org/doc/Documentation/usb/power-management.txt -- With kindest regards, Alexander. ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org ⠈⠳⣄⠀⠀⠀⠀
