Hi Aaron and Lee, While working on figuring out howto fix this Acer backlight bug properly: https://bugzilla.redhat.com/show_bug.cgi?id=1012674 TL;DR: needs acpi-video to not register the backlight device, but keep it processing hotkeys, like video.use_native_backlight=1 does, but this machine does not have a win8 ready BIOS. This eventually lead me to https://bugzilla.kernel.org/show_bug.cgi?id=35622 and the whole discussion between you there, as well as to the patches attached there. I believe that Lee's patches there to add a function to acpi-video to only unregister the backlight device are the correct way forward. I've explained why in the commit messages. Note that for the fix for bko35622 I've actually opted for a bigger hammer, by simply always calling acpi_video_unregister_backlight instead of acpi_video_unregister. Again rationale is in the commit message, it boils down to acpi_video_unregister_backlight() leading to consistent behavior, where as acpi_video_unregister() leads to different behavior depending on module load ordering. So even if this causes issues somewhere (which would be 2 keypresses reported for each press, which is not too bad), it still is better, because it at least will give us consistent wrong or wright behavior and we can then fix the double key presses from a stable base. One could go as far as to say that acpi_video_unregister() should simply go away completely. The 3th patch fixes the bug I started with by simply adding a dmi table entry for the model in the rhbz1012674 This series is RFC for now because some of these changes may be somewhat controversial, but if you agree with the proposed changes, then I would like your acks and then get this merged. Regards, Hans -- 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
