Dear all,
I have a lenovo ideapad P400. F11 and F12 buttons are also buttons for screen brightness; in thesis, the function buttons (F11 and F12) should be called at pressing the Fn button at the bottom of the keyboard, so the default for theses buttons is to adjust brightness.
But this screen brightness control does not work at openSuSE 15.1 (I cannot say when this started as I normally use at full brightness - an it was so!). As a matter of fact, booting at the default linux makes the screen completely dark; a workaround is to boot into linux security mode, which gives me mid brightness, but in any case, after boot option is chosen, controls for brightness do not work (either pressing Fn or not). They seem to work during grub presenting the options for system booting, but once linux is selected, no way to control the brightness, therefore, they (brightness) seem to be fixed (at a certain value) then (id est, completely dark for default linux and mid brightness at linux security mode).
Where should I check to solve this? This seemed to work at Leap 42.3. Ah, xbacklight (as root) outputs " No outputs have backlight property".
Thanks,
Jorge