Am Mon, 14 Jul 2014 20:21:19 +0200 schrieb "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>: > On Saturday, July 12, 2014 06:24:52 PM Julian Wollrath wrote: > > Hi, > > > > > changing the brightness on my Thinkpad X230 with Intel HD4000 > > > graphics, stopped working after commit 886129a8eebe (ACPI / video: > > > change acpi-video brightness_switch_enabled default to 0). > > > Changing it back to 1, fixes the problem, if "acpi_osi=!Windows > > > 2012" is also set. Before that commit just setting > > > "acpi_osi=!Windows 2012" was enough to get changing the > > > brightness working. > > > > small correction: It setting "acpi_osi=!Windows 2012" does only help > > when using a kernel with commit 886129a8eebe as HEAD, with v3.16-rc4 > > setting video.brightness_switch_enabled=1 and acpi_osi=!Windows > > 2012 or just one of them, does not make changing the brightness > > work again. > > And reverting commit 751109aad583 (ACPI / video: Change the default > for video.use_native_backlight to 1) make that last problem go away, > right? > > We are going to rever commit 886129a8eebe for other reasons, so can > you please revert it from 3.16-rc5 on your system and report back? Yes, with both 751109aad583 and 886129a8eebe reverted, changing the brightness works again. Cheers, Julian > > Rafael > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
