<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - backlight: min value is always 0" href="https://bugs.freedesktop.org/show_bug.cgi?id=93643#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - backlight: min value is always 0" href="https://bugs.freedesktop.org/show_bug.cgi?id=93643">bug 93643</a> from <a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> Jani Nikula</a> <pre>The backlight sysfs ABI does not define whether 0 means off or not. It means min brightness, which *may* be off. The ABI was defined for hardware which might not be able to switch the backlight off. The minimum also depends on the backlight hardware. >From ABI perspective, *both* behaviors are correct. Also for drm/i915, this depends on the panel and whether it's LVDS or eDP.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>