<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [i915 intel_backlight] can't regulate brightness at GDM login prompt if HDMI monitor connected" href="https://bugs.freedesktop.org/show_bug.cgi?id=87286#c23">Comment # 23</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [i915 intel_backlight] can't regulate brightness at GDM login prompt if HDMI monitor connected" href="https://bugs.freedesktop.org/show_bug.cgi?id=87286">bug 87286</a> from <a class="email" href="mailto:aaron.lu@intel.com" title="Aaron Lu <aaron.lu@intel.com>"> Aaron Lu</a> <pre>(In reply to jre.winesim from <a href="show_bug.cgi?id=87286#c22">comment #22</a>) > (In reply to Aaron Lu from <a href="show_bug.cgi?id=87286#c20">comment #20</a>) > > If the backlight indeed works, then we have mistakenly disabled the native > > interface and I think we should revert that patch. > > Based on Linus "We do not break userspace" I disagree. Everything works fine > here with an older kernel <3.16. And it works again for every newer kernel I > tested if I disable intel_backlight. So there was a regression in the kernel > which had to be fixed. I still don't understand what the problem is: if setting a brightness value requires root privilege, then it is true for both acpi_video and intel_backlight and if intel_backlight always works(i.e. by doing echo), I don't see why the broken user space tool works with acpi_video but not with intel_backlight...</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>