Thread: Reduce brightness on all kobo devices / challenge for developers
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Old 03-04-2019, 05:45 PM   #4
davidfor
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by pazos View Post
Sorry akorx, but the minimum brightness level will still be the minimum brightness level. I cannot speak for newer interfaces, but the classic interface of writting an integer to /dev/ntx_io (which is used by nickel even on devices with natural light) requires a number between 0 and 100, Being 1 the first value which turns on the frontlight.
I'm told by someone who should know, that Kobo do the control through the ntx_io ioctl device. Which agrees with that. But, there are some sysfs files that you might be able to tweak.

The minimum levels Kobo have chosen are for stability. If you go lower, you might get flickering or just no light. An individual device might go lower, but, it would need to be tested for each one.
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