<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED INVALID - Intel_backlight fails to change eDP1 brightness on Dell Precision 5540 (Coffeelake)" href="https://bugs.freedesktop.org/show_bug.cgi?id=111202#c13">Comment # 13</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED INVALID - Intel_backlight fails to change eDP1 brightness on Dell Precision 5540 (Coffeelake)" href="https://bugs.freedesktop.org/show_bug.cgi?id=111202">bug 111202</a> from <a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> Jani Nikula</a> <pre>Apologies if that came out rude; everyone looking at this bug would think this is about backlight, which it was initially, and that was resolved. So please let's investigate the energy saving issue you apparently already had with your 7510 machine in a different bug. Please also drop the other parameters; I don't know what you try to achieve with: i915.enable_dc=2 i915.disable_power_well=0 i915.enable_fbc=1 i915.enable_dpcd_backlight=1 acpi_osi=Linux-Dell-Video Usually none of them should be required, and indeed setting some of the i915 parameters is strictly not supported by upstream. They are for debug purposes only. Finally, please don't add logs as comments. Please attach them.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>