<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [GM45 backlight] LCD waterfall effect on HP 2230s laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=72289#c38">Comment # 38</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [GM45 backlight] LCD waterfall effect on HP 2230s laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=72289">bug 72289</a> from <a class="email" href="mailto:jza@saunalahti.fi" title="Joonas Saarinen <jza@saunalahti.fi>"> Joonas Saarinen</a> <pre>Will do. The backlight range seems correct now, although the range becomes wrong once I write the new backlight PWM value. Anyway, before manually setting the new value, the display still has the wavy effect, so problem remains. So how does this work? If done properly, should it be the responsibility of the video BIOS to set the correct PWM value already when the machine is started? I know that there has been batches of this computer sold with both CMO and SEC panel. So maybe the former works properly, but with low frequency the internal temporal dithering in the SEC display goes haywire and HP did not account for this? But then again, the Windows driver takes care of it, which makes me almost wonder that there is some exception for this panel baked in. Maybe not, though.</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>