<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_VERIFIED bz_closed" title="VERIFIED INVALID - [snb] backlight issue on TOSHIBA PORTEGE R830 after suspend/resume" href="https://bugs.freedesktop.org/show_bug.cgi?id=82634#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_VERIFIED bz_closed" title="VERIFIED INVALID - [snb] backlight issue on TOSHIBA PORTEGE R830 after suspend/resume" href="https://bugs.freedesktop.org/show_bug.cgi?id=82634">bug 82634</a> from <a class="email" href="mailto:jwrdegoede@fedoraproject.org" title="Hans de Goede <jwrdegoede@fedoraproject.org>"> Hans de Goede</a> <pre>Hi, (In reply to Sylvain Pasche from <a href="show_bug.cgi?id=82634#c13">comment #13</a>) > Hi Hans, > > Thanks for your reply. Indeed, with the "video.use_native_backlight=1" > kernel parameter, only the intel_backlight interface is available. > > However, there is still the issue that after suspend+resume, there is no > backlight (black screen), and I have to close and reopen the lid to turn it > back on. > > (the laptop dmi results are the same as > <a href="https://bugzilla.redhat.com/attachment.cgi?id=923510">https://bugzilla.redhat.com/attachment.cgi?id=923510</a>) Hmm, what does "ls /sys/class/backlight" give as output with the latest F-22 kernels without anything on the kernel commandline? And what are the problem symptoms when not having anything on the kernel commandline ? Does brightness control after boot work then? And what about after suspend/resume? Can you also try booting without "video.use_native_backlight=1" and with: acpi_osi="!Windows 2012" on the kernel commandline?</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>