<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [i915] intel_backlight does not function - Lenovo X1 Yoga OLED" href="https://bugs.freedesktop.org/show_bug.cgi?id=97883#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [i915] intel_backlight does not function - Lenovo X1 Yoga OLED" href="https://bugs.freedesktop.org/show_bug.cgi?id=97883">bug 97883</a> from <a class="email" href="mailto:elizabethx.de.la.torre.mena@intel.com" title="Elizabeth <elizabethx.de.la.torre.mena@intel.com>"> Elizabeth</a> <pre>From dmesg: [ 5.387513] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver [ 5.387513] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... [ 5.392293] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one Maybe it has nothing to do, but just in case, have you tried the "acpi_backlight=vendor" method? <a href="http://www.debugpoint.com/2016/10/2-ways-fix-laptop-brightness-problem-ubuntu-linux/">http://www.debugpoint.com/2016/10/2-ways-fix-laptop-brightness-problem-ubuntu-linux/</a> More info: <a href="https://wiki.ubuntu.com/Kernel/Debugging/Backlight">https://wiki.ubuntu.com/Kernel/Debugging/Backlight</a> Thanks, sorry for the delay.</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>