On Friday, January 28, 2011, Thomas Meyer wrote: > Am Samstag, den 22.01.2011, 20:43 +0100 schrieb Rafael J. Wysocki: > > On Saturday, January 22, 2011, Thomas Meyer wrote: > > > with 2.6.38-rc2 the acpi backlight is gone: > > > > > > any ideas? > > > > Not really, but Matthew may have some (CCed). > > Okay, found the problem. > > This commit broke my backlight: > > commit 677bd810eedce61edf15452491781ff046b92edc > Author: Zhang Rui <rui.zhang@xxxxxxxxx> > Date: Mon Dec 6 15:04:21 2010 +0800 > > ACPI video: remove output switching control > > This is because in function > "acpi_is_video_device()" (drivers/acpi/video_detect.c) the backlight > device is only checked when some video capabilities were found, but by > removing the check for the VIDEO_OUTPUT_SWITCHING (that seems to be the > only video capability on my system) the check for the backlight device > isn't done anymore. > > by reverting above commit, the backlight is back again. Is it the same issue as https://bugzilla.kernel.org/show_bug.cgi?id=27702 ? In case it is, can you test the patch in there, please? 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
