<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED --- - Backlight control broken on Dell XPS13 w/ kernel 3.14-rc7" href="https://bugs.freedesktop.org/show_bug.cgi?id=76276#c41">Comment # 41</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED --- - Backlight control broken on Dell XPS13 w/ kernel 3.14-rc7" href="https://bugs.freedesktop.org/show_bug.cgi?id=76276">bug 76276</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=76276#c40">comment #40</a>) > I experience a similar issue as this on a DELL XPS M1330 (Arch linux). > > I have tried 3.15-rc5 but that doesn't fix it. Reverting back to 3.13.8 does. > > # echo 255000 > /sys/class/backlight/intel_backlight > > Will temporarily fix it on kernels >= 3.14.1. > > I don't know if it's exactly the same bug since it isn't fixed in 3.15-rc5 > for me. Should I file a new bug? Please do, it's a different bug. In that new bug, please attach dmesg from early boot to the problem, with drm.debug=0xe module parameter set, and also attach /sys/kernel/debug/dri/0/i915_opregion. This bug remains open solely for following through with the stable backport mentioned in <a href="show_bug.cgi?id=76276#c38">comment #38</a>.</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> </ul> </body> </html>