** Changed in: linux (Fedora)
Status: Unknown => Fix Released
** Changed in: linux (Fedora)
Importance: Unknown => High
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I just tested it on my Thinkpad X1 (haswell) and the fix works.
However, there is a side effect. Connecting and Disconnecting the
Power resets the brightness to maximum. Not sure how to go about
working around this.
anmar
On 26 February 2014 23:14, madbiologist 1098...@bugs.launchpad.net wrote:
Same bug (same workarounds) on ThinkPad T440s with current Trusty.
** Tags added: trusty
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Title:
Regression in brightness control
This should be fixed in the upstream 3.14-rc4 kernel by these two
commits:
commit bd8ba20597f0cfef3ef65c3fd2aa92ab23d4c8e1 - ACPI / video: Filter the _BCL
table for duplicate brightness values
commit 0e9f81d3b7cd0649a3bc437391b6a0650f98f844 - ACPI / video: Add systems
that should favour native
The upstream 3.14-rc4 kernel also contains this commit:
author Rafael J. Wysocki
committer Rafael J. Wysocki
commit a6940190ac15c361862a1a8f50a2072db7184749
tree c73be15646c6418f77a94fede3afc7eabd589dd6
parent 0e9f81d3b7cd0649a3bc437391b6a0650f98f844
Revert ACPI: Blacklist Win8 OSI for some HP
On 13.10, the brightness works fine but the stepping is screwed up. In
other words, you don't get to access all of the brightness levels the
LCD offers. Instead, you get half the number of steps. It isn't a show
stopper by any stretch so go ahead and get your X1 carbon. It is the
best machine out
The missing brightness level problem can be worked around by using the
kernel parameter video.brightness_switch_enabled=0.
Add the param to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub, then
run 'sudo update-grub' and reboot.
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I'm using a E49 and still not working without adding parameters.
On Mon, Jan 6, 2014 at 12:11 PM, Anthony Wong
anthony.w...@canonical.com wrote:
The missing brightness level problem can be worked around by using the
kernel parameter video.brightness_switch_enabled=0.
Add the param to
I'm using an X1 Carbon with 13.10 and the brightness control works fine.
On Wed, Jan 1, 2014 at 11:29 AM, CSRedRat 1098...@bugs.launchpad.netwrote:
Fixed? Can i'm buy X1 Carbon? :)
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Fixed? Can i'm buy X1 Carbon? :)
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1 Carbon
Status
Using above fixes stepping in ubuntu. The fix is still working under
ubuntu Swapping Ctrl and Fn keys in bios works
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Title:
I installed Ubuntu 13.10 running 3.11 kernel and I noticed the stepping
is still there. The following fixed the stepping:
sudo sh -c 'echo -n 0
/sys/module/video/parameters/brightness_switch_enabled'
Seems that the driver and the GNOME settings daemon, or some other user
space tool, is
I filed a new bug to capture the issue with the screwed up brightness
stepping (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1221795)
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Yes, this makes a difference, because you are not using an Ubuntu Linux
Kernel (Saucy is currently on 3.11). If you use Mint, please file your
bugs against https://bugs.launchpad.net/linuxmint not
https://bugs.launchpad.net/ubuntu.
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Can someone test possible workaround, I am on 3.10.7 when I choose in
BIOS under keyboard options swap Fn and Ctrl keys brightness and
keyboard seems to work without Grub startup arguments.
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Is that with the newest patches?
On Mon, Sep 2, 2013 at 7:34 AM, lepri13 1098...@bugs.launchpad.net wrote:
Can someone test possible workaround, I am on 3.10.7 when I choose in
BIOS under keyboard options swap Fn and Ctrl keys brightness and
keyboard seems to work without Grub startup
Just updated to 3.10.10 no patches also tested live latest ubuntu seems
to work with both.
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Title:
Regression in brightness control
All of the Fn key combinations that I tested work well. Brightness seems
to have only large stepping 5 steps but I guess its better than nothing.
BTW I use Mint with Cinamon not sure if his makes much of the difference
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