<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW ULT]eDP brightness is zero after the computer start" href="https://bugs.freedesktop.org/show_bug.cgi?id=70791#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW ULT]eDP brightness is zero after the computer start" href="https://bugs.freedesktop.org/show_bug.cgi?id=70791">bug 70791</a> from <a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> Jani Nikula</a> <pre>(In reply to <a href="show_bug.cgi?id=70791#c1">comment #1</a>) > This dmesg is for the phenomenon when the brightness can't be changed by the > function keys and also can't find the file > (/sys/class/backlight/intel_backlight/brightness). Very strange. The dmesg shows we get the brightness requests from the hotkeys, and they increase brightness but don't go very high. Did you try to press brightness up many times? Also, there's no indication why the sysfs interface would not show up. I don't understand. Can you try the patches from Aaron <a href="http://mid.gmane.org/1381498066-16011-1-git-send-email-aaron.lu@intel.com">http://mid.gmane.org/1381498066-16011-1-git-send-email-aaron.lu@intel.com</a> with video.use_native_backlight=1 module parameter? I believe that might fix most issues, and then we'd "only" have the vanishing sysfs to figure out...</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>