bugSwinput - Bugs: bug #36512, Kernel 3.3.6: Keystrokes are faked...

 
 

bug #36512: Kernel 3.3.6: Keystrokes are faked only when the module is unloaded

Submitter:  Malte Wetz <maltewetz>
Submitted:  Mon 21 May 2012 08:58:06 AM UTC
Votes: 100
 
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open
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Mon 21 May 2012 08:58:06 AM UTC, original submission:  

On Ubuntu 12.04 with Kernel 3.3.6, swinput 0.7.4 does not immediately produce the fake keyboard events when writing to /dev/swkeybd. Instead, the events seem to be buffered and only passed on when the module is unloaded.

The following shell snippet shall illustrate:

root@hostname:~# modprobe swkeybd
root@hostname:~# echo test > /dev/swkeybd
root@hostname:~# echo "Hello World" > /dev/swkeybd
root@hostname:~# sync
root@hostname:~# modprobe -r swkeybd
testHello orldroot@hostname:~# testHello orld

Note that nothing happens after the two echo commands (line 2 and 3). But when the module is unloaded (line 5), suddenly the strings are written to the terminal.

I also have no idea why the "W" from "Hello World" is missing.

Note: I had to alter the source code to compile swinput in the first place (see #36511). I do not know if this is related.

Malte Wetz <maltewetz>

 

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