I filed a separate bug for Intel as
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/1255428
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https://bugs.launchpad.net/bugs/1241745
Title:
Sorry for the extra post, but people using Intel might find this
workaround useful:
$ sudo -i
$ echo 150 /sys/class/backlight/intel_backlight/brightness
Source: http://askubuntu.com/a/363806/170127
The maximum value is available in
/sys/class/backlight/intel_backlight/max_brightness
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Same problem with laptop as discont -- IdeaPad Z570. The graphics system
is Intel HD Graphics 3000, not NVidia. Should the bug really be filed
against the nvidia package?
Too bad that there is no ETA for this fix...
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The problem described in this bug is due to a confirmed regression in
the NVIDIA driver. If you are seeing a similar symptom on Intel, that
should probably be tracked in a separate bug.
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It would be great if the developers from NVIDIA would give this
show-stopping bug a high-priority for their first next driver release.
This makes it just unbearable to use my Laptop if I would like to use a
newer driver, which does posses some quite big performance gains which I
would love to take
Daniel, has this been fixed with 331.20? I'm seeing the entry
Added a new NV-CONTROL attribute, NV_CTRL_BACKLIGHT_BRIGHTNESS, for
controlling backlight brightness.
in the changelog.
Source:
http://ubuntuhandbook.org/index.php/2013/11/nvidia-331-20-install-ubuntu-linux-mint/
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Not to my knowledge: that changelog entry refers to adding an additional
interface via the NV-CONTROL API to the existing backlight
functionality. The problem is that the existing backlight functionality
is now broken on some laptops, so it doesn't make a difference whether
it's exposed through a
Daniel,
Is there a ETA for a fix for this?
Or a temporally work around?
I am using a:
HP EliteBook 8560w
01:00.0 VGA compatible controller: NVIDIA Corporation GF106GLM [Quadro 2000M]
(rev a1)
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Sorry, at the moment we don't have an ETA for a fix. It's not likely to
be fixed in the immediate future. I've added a note to the bug report on
the NVIDIA bug tracker as a reminder to update this Launchpad thread
when we have a fix in hand.
The only workaround I'm currently aware of is to use an
Peter Salzmann / discont / Crossle Song, if you have a bug in Ubuntu, the
Ubuntu Kernel team, Ubuntu Bug Control team, and Ubuntu Bug Squad would like
you to please file a new report by executing the following in a terminal while
booted into a Ubuntu repository kernel (not a mainline one) via:
Same issue, Macbook pro , maybe changed dir
/sys/class/backlight/apple_backlight/
xbacklight can't work. I used xmonad on ubuntu 13.10. but 13.04 work well.
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Same issue
Lenovo Ideapad Z570
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https://bugs.launchpad.net/bugs/1241745
Title:
[regression] Changing the screen brightness does not work anymore in
319.xx
Status in
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1241745
Title:
[regression] Changing the screen brightness
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