Comment 49 for bug 1203592

For years I've been using a dirty Python script that listens on DBus for
keyboard backlight events and then keeps pushing the last heard value
through DBus every several seconds. Works fine most of the time, but
something turns off the backlight after a day or two of uptime (varies).
Mere turn back on makes it work again. I can share it if anyone is
interested.

вт, 25 дек. 2018 г. в 14:44, o <email address hidden>:

> Got an issue tho. Either after suspend (or really long work session, not
> sure), efivars get reset to zero, and I have to repeat whole procedure
> again (including reboot)
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1203592
>
> Title:
> Keyboard backlight does not work in Samsung Series 9 NP900X4C
>
> Status in gnome-settings-daemon package in Ubuntu:
> Confirmed
>
> Bug description:
> In Ubuntu 13.04, the keyboard backlight does not work in Samsung
> Series 9 NP900X4C.
>
> Adding the FN key mappings as described in
> https://help.ubuntu.com/community/SamsungSeries9 does show information
> in the notification area when pressing the keyboard backlight's + and
> - buttons, but:
>
> 1) The notification always identifies the backlight as "full max"
> 2) It has no effect on the backlight - it's always off
>
> When I first installed Ubuntu on this machine (12.10), even though the
> fn keys never worked I did have intermitent backlight functionality -
> the light sensor would sometimes work and I'd see light in the
> keyboard.
>
> I dual boot in Windows 8 and backlighting works there, so this is not
> a hardware issue.
>
> More discussion can be found here:
> http://askubuntu.com/questions/233312/how-to-make-keyboard-backlight-
> fn-buttons-work-in-samsung-series-9
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1203592/+subscriptions
>