Getting special keys to work
John Hupp
lubuntu at prpcompany.com
Wed Apr 30 21:18:59 UTC 2014
I wondered much the same about lxsession-default, in part because I want
to set the power button to actually just "Shut Down" as I have it set in
Power Preferences. Now, pressing the power button produces the logout
window, which I equate with "Ask."
So far I have not found any documentation for lxsession-default.
I made it part-way to the goal with "xset dpms force off." That just
turns off the monitor, but it does do so without root permission.
On 4/30/2014 4:55 PM, Andre Rodovalho wrote:
> I know *lxsession-logout* gives us that logout window which hibernate,
> suspend and others are available... I tried to insert some commands
> but I had no luck. Maybe you can search this lxssession-logout
> documentation or it's source code...
>
> *lxsession-default quit* triggers to lxsession-logout...
>
>
> 2014-04-30 17:11 GMT-03:00 John Hupp <lubuntu at prpcompany.com
> <mailto:lubuntu at prpcompany.com>>:
>
> One problem solved: If I use "nmcli nm wifi on" and "nmcli nm wifi
> off" instead of the rfkill commands, this toggles the wifi radio
> without root permissions.
>
> Now if I could find some suspend/standby and hibernate commands
> that don't require root permission, this job would be done!
>
>
> On 4/30/2014 3:30 PM, John Hupp wrote:
>> I spoke too soon. All the programs (rfkill, pm-suspend,
>> pm-hibernate) must run as root, and nothing I have tried so far
>> has allowed these keys to work as I intend.
>>
>> I created /home/<user>/.config/openbox/toggle-wifi.sh with this
>> content:
>>
>> #!/bin/bash
>>
>> if [ $(rfkill list wifi | grep "Soft blocked: yes" | wc -l) -eq 1
>> ] ; then
>> rfkill unblock wifi
>> zenity --info --text "Enabled wireless"
>> else
>> rfkill block wifi
>> zenity --info --text "Disabled wireless"
>> fi
>>
>> And then:
>>
>> chown root:root toggle-wifi.sh
>> chmod 4755 toggle-wifi.sh
>>
>> I also tried inserting 'sudo command' in front of the rfkill
>> commands in toggle-wifi.sh, and I tried 'sudo command
>> toggle-wifi.sh' in the lubuntu-rc.xml command statement.
>>
>> On 4/30/2014 1:09 PM, John Hupp wrote:
>>> After thinking about it, I used an Upstart job to do what the
>>> MultiMediaKeys article instructed to be done with bootmisc.sh or
>>> rc.local.
>>>
>>> Though I'm no better than an Upstart hacker, especially with
>>> regard to choice of a 'start on' event, I created
>>> /etc/init/kb-keys-customize.conf with this content:
>>>
>>> # kb-keys-customize
>>> #
>>> # Map key codes to the scan codes emitted by Fn-F4, Fn-F5, Fn-F12
>>>
>>> description "Map Fn-F4, Fn-F5 and Fn-F12 kernel scancodes to
>>> kernel keycodes"
>>> author "John Hupp"
>>>
>>> start on local-filesystems
>>>
>>> script
>>> setkeycodes e017 128 e016 129 e018 130
>>> end script
>>>
>>> After rebooting, I found that 'xev -event keyboard' now reports
>>> that Fn-F4, Fn-F5 and Fn-F12 are mapped to X keysyms Cancel,
>>> Redo and SunProps, so I expect that I should be able to bind
>>> those keys in lubuntu-rc.xml to Andre's suggested commands.
>>>
>>> On 4/29/2014 6:08 PM, John Hupp wrote:
>>>> The next problem is that Fn-F4 and Fn-F5 don't generate any
>>>> keysyms, so they can't be bound to the commands suggested by Andre.
>>>>
>>>> To deal with that, I've been following the In-Depth
>>>> Instructions in
>>>> https://help.ubuntu.com/community/MultimediaKeys, and I have
>>>> identified the scancodes and picked a couple unassigned kernel
>>>> keycodes, but that article is old, and writing setkeycodes
>>>> commands into /etc/init.d/bootmisc.sh or /etc/rc.local seems
>>>> deprecated (those files don't exist).
>>>>
>>>> Is there more current documentation for this task? Is
>>>> ibus-setup supposed to handle this job somehow under Lubuntu
>>>> 14.04? Or is there another place preferred for auto-starting
>>>> setkeycodes commands?
>>>>
>>>> On 4/29/2014 3:54 PM, John Hupp wrote:
>>>>> Thanks, Andre, for all of those great tips.
>>>>>
>>>>> I've been looking at the Exec lines in several versions of
>>>>> ~/.config/autostart/LXRandR-autostart.desktop (created when
>>>>> one clicks Save in LXRandR) and thinking about how I could
>>>>> create something that would cause Fn-F7 to toggle through the
>>>>> LVDS, VGA and S-Video outputs, but your approach -- simply
>>>>> binding to LXRandR -- is a MUCH better idea!
>>>>>
>>>>> And if I wanted to add the ability to extend the desktop
>>>>> instead of mirroring it, I could install arandr and just bind
>>>>> to that instead.
>>>>>
>>>>> On 4/29/2014 3:18 PM, Andre Rodovalho wrote:
>>>>>> I tested here, and it works:
>>>>>> http://askubuntu.com/questions/181390/what-is-the-command-for-sleep-hibernate
>>>>>>
>>>>>> |*pm-suspend* and**||*pm-hibernate*|
>>>>>>
>>>>>>
>>>>>> 2014-04-29 16:13 GMT-03:00 Andre Rodovalho
>>>>>> <andre.rodovalho at gmail.com <mailto:andre.rodovalho at gmail.com>>:
>>>>>>
>>>>>> On lubuntu-rc.xml I do:
>>>>>>
>>>>>> <keybind key="XF86Display">
>>>>>> <action name="Execute">
>>>>>> <command>lxrandr</command>
>>>>>> </action>
>>>>>> </keybind>
>>>>>>
>>>>>> *lxrandr* deals with additional monitors, you just enable
>>>>>> them an apply.
>>>>>>
>>>>>> I'm not sure what commands you can execute to sleep and
>>>>>> hibernate, but you can control radio with *rfkill*. I'm
>>>>>> not sure if those commands really require root access,
>>>>>> but on that case you can do a: *gksu command*
>>>>>> *
>>>>>> *
>>>>>> Hope that helps! To test the shortcuts without restarting
>>>>>> all the system you can restart only openbox: *openbox
>>>>>> --restart*
>>>>>>
>>>>>>
>>>>>> 2014-04-28 22:03 GMT-03:00 Israel <israeldahl at gmail.com
>>>>>> <mailto:israeldahl at gmail.com>>:
>>>>>>
>>>>>> On 04/28/2014 07:48 PM, John Hupp wrote:
>>>>>> > I was trying to watch Netflix on a laptop (with
>>>>>> Lubuntu) connected to
>>>>>> > a TV by S-Video connection. I found out that Fn-F7
>>>>>> was not working to
>>>>>> > select the external VGA or S-Video displays.
>>>>>> >
>>>>>> > Subsequently I found that Fn-F4 does not put the
>>>>>> laptop to sleep, and
>>>>>> > Fn-F5 does not toggle the WiFi radio on/off. (The
>>>>>> other common
>>>>>> > special keys work OK.)
>>>>>> >
>>>>>> > So I'm trying to get those keys working that way
>>>>>> via entries in
>>>>>> > lubuntu-rc.xml.
>>>>>> >
>>>>>> > With 'xev -event keyboard' I found out that Fn-F7
>>>>>> produces the keysym
>>>>>> > 'XF86Display' but I still need to know what command
>>>>>> to bind that to.
>>>>>> > So that's my first question.
>>>>>> >
>>>>>> > Fn-F4 and Fn-F5 does not produce any keysym's, so
>>>>>> I'm currently at a
>>>>>> > loss for how to proceed next with those.
>>>>>> >
>>>>>> >
>>>>>> Hi,
>>>>>>
>>>>>> you can use arandr to make a shell script to switch
>>>>>> the display to a
>>>>>> certain mode. Plug in the monitor and use arandr to
>>>>>> make a setup you
>>>>>> want, and save that. Then open your config file for
>>>>>> openbox and set
>>>>>> the keyboard shortcut for your display key (i.e.
>>>>>> XF86Display)
>>>>>> to execute the
>>>>>> <command>
>>>>>> /bin/bash /path/to/scriptname.sh
>>>>>> </command>
>>>>>> while scriptname.sh is whatever you saved the setup
>>>>>> as with the correct
>>>>>> path.
>>>>>>
>>>>>> arandr is a front-end for xrandr. So the script is
>>>>>> actually using
>>>>>> xrandr to modify your display settings.
>>>>>>
>>>>>> I hope this helps.
>>>>>>
>>>>>> --
>>>>>> Regards
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Lubuntu-users mailing list
>>>>>> Lubuntu-users at lists.ubuntu.com
>>>>>> <mailto:Lubuntu-users at lists.ubuntu.com>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>
>
>
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