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Operating Systems Linux Ubuntu Syntax error near unexpected token `(' Post 303032734 by wisecracker on Friday 22nd of March 2019 05:48:42 PM
Old 03-22-2019
OK.


From an actual root user go to the '/dev/input' drawer and:
cat < mouse0
AND:
cat < mice
...and in each see if mouse movement presents garbage on the terminal window.
Ctrl-C should quit the test(s).

The redirection is implicit normally but I have known when attacking the HW normal rules sometimes do not apply so one has to be explicit.

One of the 'events' does the same but it was ages ago and I can't remember which one it is.

--- Post updated at 09:48 PM ---

Hi drew77...

I am pretty sure on a personal system you need root access to mess with HW devices.
But this was 10+ years ago when I hammered the HW via its device structure on a Linux tool.


Do you not have root access at all as an admin?
 

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WSMUX(4)						   BSD Kernel Interfaces Manual 						  WSMUX(4)

NAME
wsmux -- console keyboard/mouse multiplexor for wscons SYNOPSIS
wskbd* at ... mux 1 wsmouse* at ... mux 0 pseudo-device wsmux DESCRIPTION
The wsmux is a pseudo-device driver that allows several wscons(4) input devices to have their events multiplexed into one stream. The typical usage for this device is to have two multiplexors, one for mouse events and one for keyboard events. All wsmouse(4) devices should direct their events to the mouse mux (normally 0) and all keyboard devices, except the console, should direct their events to the key- board mux (normally 1). A device will send its events to the mux indicated by the mux locator. If none is given the device will not use a multiplexor. The keyboard multiplexor should be connected to the display, using the wsconscfg(8) command. It will then receive all key- strokes from all keyboards and, furthermore, keyboards can be dynamically attached and detached without further user interaction. In a simi- lar way, the window system will open the mouse multiplexor and receive all mouse events; mice can also be dynamically attached and detached. If a wskbd(4) or wsmouse(4) device is opened despite having a mux it will be detached from the mux. It is also possible to inject events into a multiplexor from a user program. FILES
For each mux device, /dev/wsmuxN there is a control device /dev/wsmuxctlN. The control device has a minor number 128 greater than the regu- lar mux device. It can be used to control the mux even when it is open, e.g., by wsmuxctl(8). /dev/wsmouse a.k.a. /dev/wsmux0 /dev/wskbd a.k.a. /dev/wsmux1 /usr/include/dev/wscons/wsconsio.h SEE ALSO
wscons(4), wsdisplay(4), wskbd(4), wsmouse(4), moused(8), wsconscfg(8), wsconsctl(8), wsfontload(8), wsmoused(8), wsmuxctl(8) BSD
July 26, 1999 BSD
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