[Wayland-bugs] [Bug 104050] scrolllock, the only key that can switch keyboard back light can't be activated

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104050

--- Comment #4 from paillave <admroyer at hotmail.com> ---
Daniel, I understand your concern, don't worry. I'm not judging. As a developer
I know that sometimes, we have to make some choices or to give an appropriate
priority on incidents/bugs. :-)

let's come back to our issue.
Right now, I'm talking about a separate keyboard, not about the keyboard of a
laptop that has its own special key to light the backlight. Separate keyboards
usually use the scroll lock key to switch their backlight. I believe that it is
done this way so that the OS, when it hibernates, can send the signal to the
keyboard that it must switch off. The only way to permit this is to give to the
OS the control on the effect of the key scroll lock. If the OS ignores this key
for some reason, the backlight and even the little led will never switch. 

Before, I was on ubuntu 16.04 (that was on X as I suppose you know). The scroll
lock key was simply ignored because it wasn't mapped by the system. Therefore,
the key was like it didn't exist. Meaning, a stroke on it had no effect what so
ever. No led was switched, the backlight wasn't switched either... nothing. I
knew it was a known issue because as I mentioned to you, lot of backlight
keyboard owners wonder why this key is disabled. On X, as I said, the command
xmodmap -e 'add mod3 = Scroll_Lock' permited to have the scroll lock key
working like a charm... like on... windows. To be more clear, from the moment I
executed this command, if I pressed on the key, the led was switched, and the
backlight as well. It was a bit annoying to type the command every time I
rebooted, or to setup the system not to have to type this command anymore, but
I dealt with it.

Since I reinstalled my machine with ubuntu 17.10 (that is on wayland as you
know as well), this command has no effect of course. Therefore, I didn't find
anyway so far to have the backlight of my keyboard working.

I hope that it clarifies the issue. Thanks for the patience from every
backlight keyboard owners! :-)

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