Hello,
I am using 3.8.0.26 on Kubuntu 13.04 (KDE) Samsung Laptop and currently
using acpi_osi=Linux acpi_backlight=vendor to enable backlight
control. Whenever I log off, the controls are disabled again and I need
to run intel_backlight. Another problem is power profiling. Whatever I
set dimming
try the whole string:
acpi_osi=Linux acpi_backlight=vendor dell_laptop.backlight=0
this worked on my Dell Studio 1558 with 3.8 kernels
Alex
On 13-04-17 09:27 PM, Luciano Dato wrote:
Oh I forgot ls /sys/class/backlight dell_backlight intel_backlight and
uname -r 3.8.0-18-lowlatency as I've
Thank you Alex that worked with mine too!
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Title:
Screen brightness control fails on Dell Studio 1558
To manage notifications about this bug go
I'm on 13.04 beta 2 the problem persist, even adding
acpi_backlight=vendor to the boot parameters. I'm on kernel 3.8.0-18 and
a12 bios firmware version for my studio 1558
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Oh I forgot ls /sys/class/backlight dell_backlight intel_backlight and
uname -r 3.8.0-18-lowlatency as I've said before
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Title:
Screen
Joe Maillard,
i installed using wubi , i cant find boot parameter to edit.
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Title:
Screen brightness control fails on Dell Studio 1558
To
i installed ubuntu 12.04 , i cannot change the brightness.
my system is dell 1558.
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Title:
Screen brightness control fails on Dell Studio 1558
uname -a
Linux ubuntu 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux
ls /sys/class/backlight
acpi_video0 intel_backlight
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naveen,
you need to manually set the boot parameter 'acpi_backlight=vendor' if
you use grub as your boot manager, edit /boot/grub/grub.cfg and add the
parameter to the end of the appropriate line that begins with 'linux'.
be sure to do this whenever you get kernel updates too.
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** No longer affects: null
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Title:
Screen brightness control fails on Dell Studio 1558
To manage notifications about this bug go to:
More info regarding Toshiba Satellite R830:
I can't change brightness after returning from sleep with Fn-keys, but
echoing numbers to /sys/class/backlight/intel_backlight/brightness does
change the brightness properly.
It seems that Fn keys write to /sys/class/backlight/acpi_video0/brightness,
@rvgsd
I think this linux-kamal-backlight PPA is not supported any longer for 10.10
and 11.04.
Kamal suggested to update to 12.04. I've seen backlight controls work
fine under 12.04 without any PPA only after adding kernel parameters.
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@cherep
On a Dell Studio 1558 with Intel HD graphics (my hardware) I still have to
supply acpi_backlight=vendor to the kernel (both 11.10 and 12.04 beta2) -- but,
you are right, no extra PPAs needed.
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This bug has been reported on the Ubuntu laptop testing tracker.
A list of all reports related to this bug can be found here:
http://laptop.qa.ubuntu.com/qatracker/reports/bugs/568611
** Tags added: laptop-testing
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Hi,
I have a Dell Studio 1558.
uname -a : Linux mypc-Studio-1558 2.6.35-32-generic-pae #67-Ubuntu SMP Mon Mar
5 21:23:19 UTC 2012 i686 GNU/Linux
With no boot parameters
ls /sys/class/backlight: acpi_video0
When using acpi_backlight=vendor as boot parameter:
ls /sys/class/backlight:
I want to report my success in finally enabling the brightness control of my
LCD screen on
HP Pavilion dv6-6192sl.
I make use of Debian/Sid and a custom 3.1.4 kernel. It didn't worked before
until I modified grub and passed the
acpi_backlight=vendor
option to the kernel at boot as told in other
@Kamal
probably I'm only one who stuck in the past with Maverick 10.10 :) but I love
it!
After updating to a new kernel, I've lost the brightness control:
$ uname -r
2.6.35-31-generic
$ ls /sys/class/backlight
[empty]
Can you please update the ppa? Do you think the ppa will be maintained in
I have updated my Ubuntu Maverick and Natty kernel PPA's with another
new experimental patch by Keith Packard[0]. This new patch may resolve
the inverted brightness and/or the jumps with successive changes
behavior that has been reported on some systems:
@cherep-
I will continue to maintain the linux-kamal-backlight PPA for Maverick
and Natty until the 12.04 release, but will likely stop maintaining it
after that time. I encourage upgrading to Oneiric; I think it unlikely
that the full set of backlight/brightness fixes will ever make it into
Please ignore my comment above. I have just tried the linux 3.1 kernel
and found both the acpi_video0 and the intel_backlight in the
/sys/class/backlight still available in debian. I thought only the
acpi_video was in the 3.0 kernel and so switched to the
kamal~mgjbacklight kernel. Maybe I will
Is there a way to have a finer control of the screen brightness?
I have been using the kamal~mjgbacklight kernels for
the /sys/class/backlight/intel_backlight control in my Dell
Studio 1558 since last spring. I now have the kamal~mjgbacklight
kernel in my Sony Vaio All-in-One with 22 display.
A BIG thank you to all involved, especially Kamal for the tremendous
efforts on this!
After one year owning that Dell Studio 1558 I finally can use linux! Freedom!
It works with acpi_backlight=vendor dell_laptop.backlight=0.
I hated it before because it was burning my eyes with backlight to the
apologies for the noise... but since a lot of 1558 owners still get
updates on the activity of this thread:
Am I the only one who doesn't have the Standby/Hibernate capability when
logged out of the session? As in, log out of your session, close the lid
-- nothing happens; and there's no option
Hi Kamal,
Thanks for your work on the backlight issue.
It was working fine for me with your PPA, until I upgraded to 11.10
(Oneiric). Now it's back to the broken behavior - stuck at maximum,
responds to the hotkeys (but only moves up or down a notch then jumps
back).
I've tried various
I just discovered something really odd, by accident: tapping the middle
touch button on the right of the laptop, the thing that looks like
three lines with blobs on the end meeting at a point, dims the backlight
as I want -- I can increase the brightness with Fn-F5. It's an odd key
combination but
Hi, my notebook is an HP Pavilion DV7 with a Radeon Hybrid Card. I had Ubuntu
10.04 32bits and the patch Kamal made worked for me using the following kernel
Params:
*radeon.modeset=0 (disables radeon discrete card)
*acpi_backlight=vendor (kamal patch)
Now I updated to Ubuntu 11.10 64bits and
Backlight brightness control in Ubuntu 11.10 (Oneiric) -- summary of
known remaining issues:
As noted previously, some Ubuntu 11.10 (Oneiric) systems will still need
to boot with acpi_backlight=vendor or some other vendor-specific boot
parameter to make the brightness up/down keys work.
This fix works on my notebook, however, I noticed two things:
1. Whenever I start my computer, the brightness is at its maximum. It does not
remember the last settings.
2. When my computer resumes from idle mode, the screen is not turned off,
instead, brightness is at its lowest.
How do I fix
@bond17_007: my laptop does adjust the brightness when booted with
kernel parameter acpi_backlight=vendor. Funny thing is, neither the
brightness nor suspending on lid close work if you log out... there
isn't even an option to suspend or hibernate from the power menu on
the login screen...
--
Thanks kamal for your work on this.
I had this issue on Dell 1558 on ubuntu 11.04. I updated to your patch. I
thought this was fixed on 11.10, I updated my system to 11.10 yesterday and now
my brightness doesn't work anymore :(. The applet shows the bar but notthing
happens on the screen.
[Oneiric Beta users]:
In Oneiric, the behavior screen brightness keys toggle from max to min-
brightness (no steps between) in the Unity desktop is caused by bug
827517, which is now fixed in the gnome-settings-daemon package in the
main Ubuntu archives -- but the fix didn't arrive until just
Thank you Kamal (and everyone) for continuously providing help and
solution for this issue. I have one quick question. Although I don't
think it's proper to post it here but I assume it's related to the
kernel I applied via the PPA. Since installing it, my wireless is
disabled and could not be
Tried today Oneiric with linux-image-generic 3.0.0-9.15
The screen display control turns the screnn On or OFF, there is no
intermediate brightness.
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Sorry for the noise.
Only now I saw comment 228.
I added dell_laptop.backlight=0 to kernel start options and it is now
working with the standard Oneiric kernel.
It was not required to use gnome-settings-daemon from the PPA.
Thanks!
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dell studio 1558, i3, intel graphics, oneric i386 beta daily build
booting into live environment as is (both Unity and KDE) -- brightness
keys don't work, brightness sliders in settings do nothing.
booting into live environment with acpi-backlight=vendor option -- in
KDE brightness works as
This bug was fixed in the package linux - 3.0.0-9.12
---
linux (3.0.0-9.12) oneiric; urgency=low
[ Andy Whitcroft ]
* [Config] standardise CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m
* [Config] move ECRYPT_FS back to =y for all architectures
- LP: #827197
* record the
** Changed in: linux (Ubuntu)
Status: In Progress = Fix Committed
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Title:
Screen brightness control fails on Dell Studio 1558
To manage
I'm very pleased to announce that the last of Matthew Garrett's
backlight patches has been merged into the upstream Linux tree[1] and
the Ubuntu Oneiric kernel tree. It should appear in the next official
Oneiric kernel release (3.0.0-9.12). As noted previously, some Oneiric
systems will likely
Great news!!! Thank's for all your work Kamal!
2011/8/17 Kamal Mostafa ka...@canonical.com
I'm very pleased to announce that the last of Matthew Garrett's
backlight patches has been merged into the upstream Linux tree[1] and
the Ubuntu Oneiric kernel tree. It should appear in the next
I have identified and fixed the cause of the toggles backlight on or
off problem in Ubuntu Oneiric [ reference
https://bugs.launchpad.net/ubuntu/+source/gnome-settings-
daemon/+bug/827517 ]. My backlight PPA
https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight
now supplies a
Using 2.6.38-11-generic #48+kamal~mjgbacklight5-Ubuntu, on a Studio
1558, the backlight keys work (I see the notification), but the
backlight levels are no longer changing.
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I have a fresh install on natty on my Dell Studio 1558, The brightness
keys do NOT work with the last PPA update with kernel 2.6.38-11.
If I boot with the previous kernel the brightness keys work as expected.
2.6.38-10-generic-pae #46+kamal~mjgbacklight4-Ubuntu SMP Fri Jul 15
03:10:48 UTC 2011
I have uploaded a revised Natty kernel to the PPA, which should fix the
regression some users have reported since the last update (this revision
re-instates the enabling of acpi_backlight=vendor parameter by default).
The new 'kamal2' Natty kernel (linux -
2.6.38-11.48+kamal2~mjgbacklight5) is
I've just updated on Oneiric 14R N4010. The brightness keys are now
working without any kernel boot options:
bcbc@ubuntu:~$ uname -a
Linux ubuntu 3.0.0-8-generic #11+kamal~mjgbacklight5-Ubuntu SMP Fri Aug 12
23:53:11 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
bcbc@ubuntu:~$ ls /sys/class/backlight
The hotkeys for brightness control don't work correctly. Brightness can
only be controlled using the new Screen system in the new Gnome Control
Center.
** Attachment added: Screenshot at 2011-08-14 08:48:50.png
I'm running Oneiric, Dell 14R N4010
Since applying the patch, the brightness keys work, but only to toggle the
screen off and on.
I tried adding the boot option dell_laptop.backlight=0 but it didn't
make a difference. Before I added that boot option I had a
dell_backlight entry in
I am on Oneiric Dell 14R N4010.
The latest kernel only allows to toggle on or off the backlight, i think it has
something to do with the new power manager in Gnome 3.
Would Gnome Power Manager 3 be patch against this ?
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Kamal, I've seen that there haven't been updates on the patches source
code for a while, the last one is for kernel 2.6.38. Are the patches
anywhere else?
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Yeah, I don't want to keep bugging you either, but 2.6.38-11 #48 kernel
from proposed is currently overriding the latest backlight fix kernel
(2.6.38-11 #47)
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Good news to report from upstream... the last of Matthew Garrett's
backlight brightness patches has seen some renewed activity on the
intel-gfx mailing list[1]. I expect the latest version of the patch[2]
(targeted for linux kernel version 3.1) to be merged into the mainline
trees soon.
I have
Esta muyy bueno, que salga de una vez!!!
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2011/8/12 Kamal Mostafa ka...@canonical.com
Good news to report from upstream... the last of Matthew Garrett's
backlight brightness patches has seen some renewed activity on the
intel-gfx mailing list[1].
Hi,
Just to inform the patch is working fine in a Samsumg RV410, who was
showing a very dark screen before it.
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Title:
Screen brightness control
Kamal, your ppa worked awesome (using Gnome3/2.6.38-10.46).
Pavilion dv6 'Quad Edition' Hybrid Graphics
Brightness controls worked on the Radeon 6740 side and Intel side.
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Any news on when the #46 kernel will be built?
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Title:
Screen brightness control fails on Dell Studio 1558
To manage notifications about this
I have just uploaded the latest Maverick 2.6.35-30.56 and Natty
linux_2.6.38-10.46 kernels to the PPA:
https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight
(the packages are queued and should build some time in the next several hours).
Still no change in upstream status as of
Asus UL30A again.
11:40 root@lumpek:intel_backlight# uname -a
Linux lumpek 2.6.38-10-generic #44+kamal~mjgbacklight4-Ubuntu SMP Mon Jun 6
19:40:12 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
/sys/class/backlight/
11:38 hrw@lumpek:backlight$ ll
razem 0
lrwxrwxrwx 1 root root 0 2011-06-28 11:36
Also when 'asus_laptop' driver is used with 3.0-2-generic 'oneiric'
kernel I got ACPI exceptions when changing backlight level:
Jun 28 11:54:39 localhost kernel: [ 612.337945] ACPI Error: Result stack is
empty! State=880103c9ec00 (20110413/dswstate-98)
Jun 28 11:54:39 localhost kernel: [
Upstream status of the patch set: No change in status as of upstream
Linux v3.0-rc4 We are still (yes, still!) waiting for one critical
patch to be applied to the upstream linux kernel before we can integrate
this functionality into the main Ubuntu kernel. Until such time, I will
continue to
Could you send the link for the bug upstream? Thanks!
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2011/6/21 Kamal Mostafa ka...@canonical.com
Upstream status of the patch set: No change in status as of upstream
Linux v3.0-rc4 We are still (yes, still!) waiting for one critical
patch to
I'm a complete newcomer to Ubuntu (and Linux in general), but I can
immediately see the improvements in using my netbook with it over Win7.
That said, I'm having the same display brightness problems as above.
I can use the workaround for setpci, but I can't get the PPA working.
It shows up as an
@Barry Lennon
Hello Barry. Here is what I did to install this ppa: I added it to my
software sources in update manager (in other software tab), than ran
an update of my system (also in update manager) and it installed
everything all by itself.
I also suggest you read this:
@Kamal Mostafa: any mainline-related updates?
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Title:
Screen brightness control fails on Dell Studio 1558
To manage notifications about this bug
On a Laptop Dell Inspiron 14R with Ubuntu 11.04 64bit, blacklight
control is working as intended with the patched kamal mostafa kernel.
Thank you very much.
I had similar issue though with the screen lock when returning from
suspension or from screen saver; my screen was randomly freezing, but I
I have an emachines E525 laptop and I have been experiencing problems with my
screen backlight since I installed Natty.
I have installed the patched kamal mostafa kernel and my problem symtoms now
are:
1) no backlight at startup but fixable with the hotkeys
2) the inverted hotkeys.
3) the
Is there a way like somehow apply it to Fedora 15? Something like a
conversion tool from deb to rpm?
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Title:
Screen brightness control fails on
ASUS UL30A running oneiric with 2.6.38-9-generic amd64 kernel:
[0.00] Linux version 2.6.38-9-generic (buildd@king) (gcc version
4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) ) #43+kamal~mjgbacklight4-Ubuntu
SMP Fri Apr 29 04:33:59 UTC 2011 (Ubuntu
2.6.38-9.43+kamal~mjgbacklight4-generic 2.6.38.4)
I have the studio 1558, brightness control problem going on.
I added the repository with:
sudo add-apt-repository ppa:kamalmostafa/linux-kamal-mjgbacklight/ppa
Then I did:
sudo apt-get update
It still wouldn't work, so I ran this:
sudo apt-get dist-upgrade
I guess I'll reboot, and see if it
when I use $ lsmod | grep ^i915 in terminal it shows command not found
Linux ubuntu 2.6.39-0-generic #5~20110427-Ubuntu SMP Wed Apr 27 15:27:41 UTC
2011 x86_64 x86_64 x86_64 GNU/Linux
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i915.alse_backlight=1 doesn't have any significant effect for me.
Brightness can be lightened on again only with hotkeys
(brightness_workaraound.pl script associated to Fn Keys).
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I've discovered a slight difference with i915.alse_backlight=1:
the actions over the intel_backlight interface (script associated with key
combination [ echo NUM intel_backlight ]) can reestablish a correct screen
brightness while without that kernel parameters, those same actions, seem to be
i915.alse_backlight=1 result:
no more hotkeys (full bright, which is always the default)
immediately bright again after lid open (instead of black that I can regulate
up with hotkeys)
/sys/class/backlight/ empty (instead of intel_backlight without parameter)
also:
unknown parameter
Hi all
I used this
https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight;
to mi Acer eMashines G525 and it works but the LCD brightness is going
backwords
So i set my LCD brightness to 3 % and then itś working
this is from the bug report
Addressing several recent posts regarding the linux-kamal-mjgbacklight PPA:
https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight
A few of you have reported problems with the backlight not coming back
on after power management / lid events (or after 'xset dpms force
off')... It
Hi, I have a dell inspiron N7010, and this PPA fixed my backlight
problem in Maverick; however, not in natty. The backlight interface is
created, but is not controled by Gnome 2.32.1.
uname -a
Linux Rebuild 2.6.38-9-generic #43+kamal~mjgbacklight4-Ubuntu SMP Fri Apr 29
04:33:59 UTC 2011 x86_64
Apparently, the update from maverick to natty caused Gnome power
management to be removed. I installed it, and now the power keys, etc.
work.
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The temporary workaround works for HP Pavilion dv3-2016t running Ubuntu
11.04. Thank you!
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Title:
Screen brightness control fails on Dell Studio
Another user (bug 773471 comment 15) reports yet different strange side
effects: It only works till he moves the mouse.
quote:
yes till the first mouse move...the backlight hotkeys worki can bring it
back with setpci...its ok for me to close the lid and after xset dpms force
off, press a
Correction for comment 188: With the Extensa from bug 518002 the problem
is just that after lid close or xset dpms force off the backlight does
not come on again with any keypress like it should. Instead I have to
use the hotkeys to up the brightness from zero to what I want. Which is
kind of
Same problem. The patched kernel makes backlight control work again on
an Acer Extens 5635Z (bug 518002), but if I close the lid it does not
come back on again. Not even with setpci. Tested with both kernels on
maverick.
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I've noticed a bug with the 2.6.38 patched kernel:
when the backlight is powered off by a power managemente agent, it can't be
lightened on again!
Also with:
$ xset dpms force off
turns the screen off but it cannot be lightened back! The computer still
perfectly working, but no screen!
With
Hi Kamal,
still doesn't work for me. I have an Acer travelmate 4230-6704 and can't
change lcd brigthness. My Fn key is not working too (keyboard problem).
tried
echo -n 100 /proc/acpi/video/VGA/LCD/brightness
sudo setpci -s 00:02.0 F4.B=FF
I'm using
Ubuntu Natty with gnome-power-manager
Hi Kamal,
Your patched kernel allows brightness control to work on a new Medion
Akoya E7216 laptop where the ACPI brightness implementation fails, so
thats great! Thanks for the work you have done to make this work on this
system.
However I would like to use the same kernel also another range of
Dear Kamal
how could I change the contrast of my screen directly in the driver
using something like :
echo value / driver/..
or any other sentence, I propose this like a solution quick because my
studio don't allows a upgrade right now until the vacations. My laptot
is a dell studio 1558
@kamal,
I am using Ubuntu Lucid 10.04 in my Dell studio 1558 and having the same
problem with my brightness controls not working.
I tried to follow the steps that you mentioned but seems like I lost
somewhere.
Here is what I did. Can you please tell me where things went wrong?
1) First
Dear Kamal,
Could you please also look at Bug #538256 ?
It's the exact same issue but for Lenovo IdeaPad net/notebooks including
Z360.
Your kernel PPA works but only in GNOME. I use Ubuntu Maverick 10.10 +
KDE 4.6.0 from KDE PPA and brightness control doesn't work at all.
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Hi Kamal
I'm try to installing PPA dedicated to dell studio 15xx in my studio
1558 but when I try to download sources the update manager says;
Failed to fetch
http://ppa.launchpad.net/kamalmostafa/linux-kamal-mjgbacklight/ubuntu/dists/lucid/main/binary-i386/Packages.gz
404 Not Found
Some
@AndreaV - Thanks for contributing those scripts!
@adam - its unlikely that the backlight brightness patch would affect
the boot time of your Natty system -- its possible that the issue you're
experiencing relates to something else in the (fast moving) Natty beta
kernel. If you can determine
Upstream status:
I am happy to report that most of the core backlight brightness patches
we've been waiting for (Matthew Garrett's work) have been integrated in
the the mainline Linux 2.6.39 kernel source repository. This means that
the new intel_backlight functionality will now get the
Dear Kamal, many of us can't upgrade because of this bug
https://bugzilla.redhat.com/show_bug.cgi?id=624212.
Could't be another option for Lucid users?
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http://jorgejhms.lamula.pe
2011/4/5 Kamal Mostafa ka...@canonical.com
@AndreaV - Thanks for contributing those scripts!
I'm sorry, I mean this bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/656745
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2011/4/5 jorgej...@gmail.com jorgej...@gmail.com
Dear Kamal, many of us can't upgrade because of this bug
https://bugzilla.redhat.com/show_bug.cgi?id=624212.
My Acer Aspire 5734 laptop had this problem upon upgrading to Natty beta
1. The above patch worked, but the display still shuts off (not just
black with a cursor) for a full 30 seconds during boot. Pre-dist-
upgrade I was booting in 30 secs total. I can only hope this will get
better?
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Just patched a vanilla 2.6.38 kernel on dell laptop XPS 15 running Slackware
13.37.
The intel_brightness interface works great!
Just to let it be used within kde I've written two trivial utilities:
brightness_workaround.pl
#!/usr/bin/perl
open(ACTUAL,
Thanks KAMAL!
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Title:
Screen brightness control fails on Dell Studio 1558
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Thank you very much, Kamal!
This fixes the backlight controls on my Dell Studio 1558 (Core i5
integrated GPU). I run ArchLinux, but the patch applied to a vanilla
2.6.38 kernel without issue and works great.
Here's to hoping that it makes it in 2.6.39 mainline.
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I have the same issue on my Dell Inspiron 14 R (N4010), on Kubuntu 10.10
64-bit, with the 2.6.35-27-generic kernel, i915 kernel module for
graphics. I can move the brightness slider in the battery applet but
that has no effect on the brightness. Will this be fixed in 11.04?
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Good questions, Andy.
Can I ask what the upstream status of these patches are?
Upstream status: Unfortunately, the core patches which enable the new
intel_backlight did not make it into the upstream Linux 2.6.38 mainline
kernel (soon to be released). The patches will likely get re-submitted
My backlight PPA at https://launchpad.net/~kamalmostafa/+archive/linux-
kamal-mjgbacklight has been updated with a revised version of the
experimental backlight control patches.
This version also includes various upstream Intel GPU driver changes,
and sets the kernel parameter
Dear Kamal,
This PPA also fix this bug
https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/656745
This is the only reason I'm restraining myself to upgrade to maverick
and staying in lucid, being unable to use your pacth...
Regards!
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Can I ask what the upstream status of these patches are? I just had to
replace my (broken, and now out of production) 1558 with a new Arrandale
laptop (a Dell L501X / XPS 15), and was amused to discover that it,
too, needs the intel_backlight patch.
This has been a long-standing issue, spanning
Yeah, it should be included at least in the Ubuntu kernel version, or
have a special PPA with the pach. I think there are other issues with
Dell machines in a PPA but there isn't available for Lucid.
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