The hardware is Acer Aspire V5-573G with Intel (Haswell) video + Nvidia GPU. I can increase brightness normally with the keyboard fn + arrow keys.
Happened on the stock kernel from Ubuntu 13.10 Beta and the latest mainline kernel from ubuntu kernel-ppa: linux-image-3.11.0-999.
The brightness levels show up correctly under /sys/class/backlight/acpi_video0
and respond to the brightness controls so it's using the acpi video driver.
Another using reporting same problem: http://www.linuxquestions.org/questions/linux-newbie-8/black-screen-when-trying-to-install-linux-on-acer-aspire-v5-573g-4175472954/
*** This bug has been marked as a duplicate of bug 60682 ***
erno, this wouldn't be a duplicate of 60682. As well, 60682 is a "catch all" trash bug that wouldn't be efficient in getting any problem solved. If you have the permissions, you would want to unmark the duplication, and continue to work downstream at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1224415 .
While blacklisting this machine (bug #60682) would solve the problem, that is a temporary solution. Eventually all these machines would use the Intel backlight driver, so this problem would happen again.
Either way, other people that don't have their machine blacklisted would still have this problem. So I suggest keeping this bug open for the Intel driver.
Ok, seems I bugzilla lets me reopen this.
$ ls /sys/class/backlight
And if there is intel_backlight, does it work?
Please also attach acpidump, thanks.
Lenovo Ideapad Z510 has same issue
Created attachment 112811 [details]
Lenovo Ideapad Z510 acpidump
Your laptop is a win8 system, so can you please try Rafael's linux-next branch?
And please add video.use_native_backlight=1 when testing that tree, thanks.
Created attachment 112871 [details]
Patches to quirk initial backlight level 0 problem
Here are two patches, please apply on top of Rafael's linux-next branch:
And see if it helps, thanks.
Ping, please test patches mentioned in comment #10, ignore comment #9.
It works, screen is set to max brightness on boot now. Thanks!
Author: Aaron Lu <email@example.com>
Date: Wed Nov 6 09:07:10 2013 +0800
ACPI / video: Quirk initial backlight level 0
Entered Linus' tree.