Re: Partial Mouse Lockup. New keyboard no response
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.
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