** Changed in: linux (Fedora)
Status: Unknown => Fix Released
** Changed in: linux (Fedora)
Importance: Unknown => High
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Title:
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 on Lenovo
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
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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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
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
To manage
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:
Regression in
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
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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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 on Lenovo
On my Thinkpad X230, the problem was present in May 2013 but now is gone
(3.8.0-25-generic). I cannot tell which kernel update brought the fix.
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** Branch linked: lp:ubuntu/precise-proposed/linux-lts-raring
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
** Changed in: linux
Status: Incomplete = In Progress
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1
Same issue on HP EliteBook Folio 9470m.
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller
(rev 09)
Subsystem: Hewlett-Packard Company Device 18df
Flags: bus master, fast devsel, latency 0
Capabilities: access denied
00:02.0 VGA compatible
Linux clint-HP 3.8.0-23-generic #34-Ubuntu SMP Wed May 29 20:22:58 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux
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Title:
Regression in brightness
** Changed in: linux
Status: In Progress = Incomplete
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1
I can still confirm that this issue exists with kernel 3.8.0-25-generic
on a Lenovo T430.
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Title:
Regression in brightness control on Lenovo
uname -r
3.8.0-25-generic
bug still exists on thinkpad t430
created new bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1183856
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With the latest upgrade to 3.8.0-25-generic #37-Ubuntu SMP Thu Jun 6
20:47:07 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux the problem is not
present on my Lenovo T530 anymore.
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@Seth Forshee (sforshee), can you provide *all* patches for this bug in
3.10 kernel ?
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Title:
Regression in brightness control on Lenovo
Works fine with my X230 tablet too.
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1 Carbon
To manage
I'm getting errors attempting to patch 3.9.5:
0001*.patch:
Hunk #5 FAILED at 1097.
0003*.patch:
Hunk #1 FAILED at 1661.
I'll compile it anyway, and try with 3.10-rc4 later tonight.
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Adding those patches to a clean 3.9.5 folder on an Edge E330 results in
default behaviour (as if no patch were applied).
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Title:
Regression in
On Tue, Jun 11, 2013 at 09:25:28AM -, Nathaniel Roach wrote:
I'm getting errors attempting to patch 3.9.5:
Yes, the patches require backporting to anything before 3.10.
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On Tue, Jun 11, 2013 at 12:13:18AM -, Anmar Oueja wrote:
The kernel 3.10.0-0-generic #2~lp1098216v201306100718 works
great on a Thinkpad X1 Carbon.
Lowest setting turns off the LCD, which is great. Is this going
upstream?
It's not clear. There seems to be another solution under
On Tue, Jun 11, 2013 at 08:54:44AM -, Brain wrote:
@Seth Forshee (sforshee), can you provide *all* patches for this bug in
3.10 kernel ?
All the patches used in the build are already posed in the same location
as the debs.
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On Tue, Jun 11, 2013 at 09:48:17AM -, Nathaniel Roach wrote:
Adding those patches to a clean 3.9.5 folder on an Edge E330 results in
default behaviour (as if no patch were applied).
Can you explain what this means? Are you saying that the patches do
apply cleanly to 3.9.5, but don't work?
Seth: They do apply to 3.9.5 but do not do it cleanly (see errors in
comment #90).
My Edge E330 has an Intel i5-3210M with (only) Intel HD4000 graphics.
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Edit: Behaviour is *exactly* the same as when the bug was not fixed -
brightness can only be relatively moved slightly, and when it does it
flickers. It can be moved specifying a value (not just up/down), but
still flickers.
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Under patched 3.10-rc5: Backlight control is *COMPLETELY* dependent on
the shell being able to process the request - Backlight control does not
work while booting or while the shell is frozen. Otherwise, I appreciate
the finer control.
(Ubuntu-GNOME 13.04)
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On Tue, Jun 11, 2013 at 02:49:21PM -, Nathaniel Roach wrote:
Under patched 3.10-rc5: Backlight control is *COMPLETELY* dependent on
the shell being able to process the request - Backlight control does not
work while booting or while the shell is frozen. Otherwise, I appreciate
the finer
Fair enough, just thought I'd post my findings here,
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1 Carbon
On Tue, 2013-06-11 at 12:45 +, Seth Forshee wrote:
On Tue, Jun 11, 2013 at 08:54:44AM -, Brain wrote:
@Seth Forshee (sforshee), can you provide *all* patches for this bug in
3.10 kernel ?
All the patches used in the build are already posed in the same location
as the debs.
@Seth Forshee (sforshee), I build a patched kernel from Fedora Rawhide with 3
patches (from you repo) 10 minutes ago and all works! Great!
3.10.0-0.rc5.git0.1.bko35622.fc20.B.x86_64
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We've got a new proposed permanent fix for this problem. I've posted a
test build at the link below, please give it a spin and let me know how
it works.
Note that this kernel is based on 3.10-rc4 and may not be 100% stable.
After testing you'll probably want to go back to using your current
** Changed in: linux
Status: Incomplete = In Progress
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1
I just installed the packages on my T530: Backlight control is working
and provides a more fine grained control than with the workaround in
current kernels. If I ramp the brightness up and go down towards 0% than
the last step completely turns off the backlight. But that's nothing
that would be
The kernel 3.10.0-0-generic #2~lp1098216v201306100718 works
great on a Thinkpad X1 Carbon.
Lowest setting turns off the LCD, which is great. Is this going
upstream?
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3.8.0-22-generic also fixed this for my X230. Thank you!
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1
Confirmed that 3.8.0-22-generic fixes the problem on my X1 Carbon as
well. Thank you!
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Title:
Regression in brightness control on Lenovo
Confirmed 3.8.0-22-generic fixes the issue for me too on my X1 Carbon.
Thanks.
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Title:
Regression in brightness control on Lenovo Thinkpad X230
Last Kernel Updates (3.8.0-22-generic) does not resolve the Problem for
my ThinkPad T430.
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Title:
Regression in brightness control on Lenovo
Latest kernel update fixed this problem for me on TP X230.
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1
3.8.0-22-generic fixed the issue on ThinkPad T430s
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1 Carbon
Felix, are you sure you rebooted after installing it? What does uname
-r say? Anyway, as this bug report is about X230 and X1 carbon, please
open another bug report for that hardware.
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The *bug* effects ALL Thinkpad ??30s including the EDGE E330 - it is not
specific to the X230 and X1 carbon.
On 24/05/13 17:49, Marius B. Kotsbak wrote:
Felix, are you sure you rebooted after installing it? What does uname
-r say? Anyway, as this bug report is about X230 and X1 carbon, please
3.8.0-22-generic fixed issue on my X1 Carbon. Many thanks guys! :-)
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet)
uname -r
3.8.0-22-generic
and only works with:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=\!Windows 2012\
the new kernel has no effect for Thinkpads T430, in changelog only T430s
is listed.
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Confirmed 3.8.0-22-generic fixes the issue on my Thinkpad X1 Carbon.
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet)
The latest kernel update resolves this issue for me (3.8.0-22-generic).
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Title:
Regression in brightness control on Lenovo Thinkpad X230
** Branch linked: lp:ubuntu/raring-proposed/linux-ppc
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
X1 Carbon
This seems to be fixed now using the latest kernel update (Linux x1
3.8.0-22-generic)
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Title:
Regression in brightness control on Lenovo
So I just updated to 3.8.0-21 and the problem is *back* . Please note
that the problem was properly fixed in 3.8.0-20
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Title:
Regression in
I confirm. 3.8.0-20-generic solve the problem on latest model of the x1
carbon.
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Title:
Regression in brightness control on Lenovo Thinkpad X230
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed'
to 'verification-done'.
If verification is not done by one week from today, this fix will
Works in Kernel 3.8.0-20-generic. 16 brightness steps are available
again.
On a different note: I don't recall changing the brightness being so
laggy. The onscreen notification updates with about 0.5 seconds delay in
Gnome-Shell (3.8.1-0ubuntu1~raring1.2) and the brightness slider in the
settings
Kernel 3.8.0-20-generic fixed the issues on Lenovo T430s as well.
Everything works perfectly now and I did not notice any lag descibed in
comment #66 (I am using Unity).
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** Tags removed: verification-needed-raring
** Tags added: verification-done
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Title:
Regression in brightness control on Lenovo Thinkpad X230
Where I can download patches from 3.8.0-20-generic (this BUG)
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Title:
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and
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