<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - i915 kms turns display black on Asus T100HA (Intel Atom x5-Z8500)" href="https://bugs.freedesktop.org/show_bug.cgi?id=97529#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - i915 kms turns display black on Asus T100HA (Intel Atom x5-Z8500)" href="https://bugs.freedesktop.org/show_bug.cgi?id=97529">bug 97529</a> from <a class="email" href="mailto:pan0@centrum.cz" title="Pavel <pan0@centrum.cz>"> Pavel</a> <pre>Unfortunately I have to correct my previous statement. The backlight control is not working even with those options. The error message "Failed to own the pwm chip" disappeared and the file /sys/class/backlight/intel_backlight/brightness is present and writable, but backlight doesn`t change after writing any value in it. I`ll do some more tests, maybe I am doing something wrong. The only kernel I`ve found which has working backlight control is this <a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc5-unstable">http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc5-unstable</a> , but there is also no image after kms. I`ve also tested yesterdays drm-intel-nightly (507a1d98d13f18acd36d9b81f4b316a3f79af00e 4.8.0-rc4+) and the behavior is still the same. Please let me know if I can help with this somehow. Thanks Pavel</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 QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>