I've actually managed to fix this problem without the workaround by
adding acpi_backlight=vendor to the GRUB_CMDLINE_LINUX of
/etc/default/grub
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I have this problem with 13.04 on a Lenovo y410p (4th gen Intel + nvidia
gpu). My workaround was to add
echo 100 | sudo tee /sys/class/backlight/acpi_video0/brightness
to my /etc/rc.local file but this isn't exactly an ideal solution.
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How to make this fixed? Why isnt it fixed?
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Title:
On startup, the backlight is off on laptop
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Since I upgraded to 13.04, everything is just fine again. No need of any
extra parameters in grub file.
g
2013/6/13 Kangarooo Jānis 765...@bugs.launchpad.net
How to make this fixed? Why isnt it fixed?
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Boot is (at last) OK with last update in KUBUNTU (kernel
3.8.0-22-generic), on ACER emachines G725.
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Title:
On startup, the backlight is off on
On my system (Ubuntu 13.04 Kernel 3.8.0-25-generic, Acer V3-771G) the
issue still exists.
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Title:
On startup, the backlight is off on laptop
To
I believe this problem also affect Packard Bell EasyNote LV. It need
i915.invert_brightness=1 to avoid the black screen of death when
installing Ubuntu and when booting the installed system. With the
setting in place, one can log into Gnome, but when one log into KDE, the
screen is turned off
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: ubuntu (Ubuntu)
Status: New = Confirmed
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Title:
On
Where is the fix?
Ubuntu 13.04 (I made an usb live stick) nothing fixed.
** Also affects: ubuntu (Ubuntu)
Importance: Undecided
Status: New
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After updating to the latest kernerl 3.8.0.13 on 13.04 somehow the rc.local
file is not activeted any more and the fix of setpci -s 00:02.0 F4.B=00 only
works after the computer is ready after boot and i have to use a externa screen
to acces terminal window to setpci again
And five times i an
If you're having this problem on an Acer/eMachines/Packard Bell/Gateway
laptop, try booting with i915.invert_brightness=1 module parameter
(https://help.ubuntu.com/community/BootOptions). If it works, consider
filing an upstream bug on Product=DRI, Component=DRM/Intel
Hello.
Friend of mine kept bugging me to look at his problem. He has Gateway
NV78 and tried to install ubuntu 12.10. Encountered backlight problem
(he thought all was dead).
Tried a few suggestions to no avail. The 'setpci' worked, but did not
help after screen-saver/hibernate/etc.
I have not
Hello!
Got semi-erratic troubles with the backlight too:
Laptop Asus N76VZ
Ubuntu 12.10
Starts with a medium- low luminosity so i made shortcut to (french
language system): parametres systeme , then : lumisosité et
verrouillage witch could be translated as something like system
configuration ,
in eMachines E725 remains the same at first. (Ubuntu 12.04 up to date)
the fix for the kernel is only the kernel? when implemented in ubuntu?
sorry for my bad english
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On my HP 62-a35er with integrated intel gpu and discrete radeon gpu fix is not
correct. If I don't add kernel parameter acpi_backlight=vendor backlight is off.
As I tested at boot there are 4 items under /sys/class/backlight:
acpi_video0
acpi_video1
intel_backlight
radeon_bl1
After login
Just found that laptop-mode-tools installed changed brightness under
intel_backlight to 4394...
Originally it was set to 0.
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Title:
On startup,
** Changed in: linux
Status: Confirmed = Fix Released
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Title:
On startup, the backlight is off on laptop
To manage notifications about
News:
my guess is that it is still the randomness of the bug working around, or there
has been a substantial improvements in recent kernels/Xorg drivers, but the bug
is still present however in the past month EVERY time it occurred I could log
in, suspend the computer (not hibernate), wake it
@ kangaroo : thanks
I'll try to get as much info as possible next time I am affected by the bug
(hopefully, never). As I told it is very random, the laptop may work for 2
weeks and then suddenly it gets dark and none of the standard tricks wakes it
up (or never the same...)
Right now I removed
Here i made Gdocs Spreadsheet for accumulating all info.
https://docs.google.com/spreadsheet/ccc?key=0Al_jJwVplfK7dFdPdURaQkdlQlhCaDlfM3hZOGhMa0E
Post ur laptop name and what works and what doesnt and how
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Hi everybody
- Dell Latitude E4310 / core i5 with intel graphics chip
- LTS 12.04
This bug is VERY SEVERE on my laptop (actually, it is almost broken now and I
will soon need a new one).
reason:
- when it happens there is no backlight and nothing to do, or almost
- it is quite random. I tried
Hey, thanks sma!!! It really worked! Great tip! I've been searching for
the answer for a looong time.
I'm using an acer 5732z and i already had ubuntu 12.10 installed. I only
followed your advice starting with the grub part and it still worked.
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I tried
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_backlight=vendor
i915.invert_brightness=1
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=Linux
acpi_backlight=vendor i915.invert_brightness=1
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=nomodeset
acpi_backlight=vendor
try without acpi_osi and check if works with changing brightness and
if alt+tab gives 3d effect.
if not good then try it should work.
acpi_osi=nomodeset
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Both parameters had no effect. The screen backlighting went off, as it did
in the first place.
g
2012/12/8 Kangarooo 765...@bugs.launchpad.net
try without acpi_osi and check if works with changing brightness and
if alt+tab gives 3d effect.
if not good then try it should work.
Did you really tryd changing brightness when comp has loaded? Using
FN+Right/Left arrow? In all 3 variations?
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Title:
On startup, the backlight
2012/11/30 sma 765...@bugs.launchpad.net
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash“ by this line:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=Linux
acpi_backlight=vendor i915.invert_brightness=1
I added this line and it works for me EXCEPT that I get a lower resolution.
I had 1366 x 768,
Emachines e525
Intel Celeron 900 @ 2.20 GHz
12.10 black screen.
Latest kernel: Found linux image: /boot/vmlinuz-3.5.0-17-generic
Tryd nomodeset
On booting Ubuntu says it will go to safe mode and reconfigure doesnt work.
Nothing works.
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Emachines e525
Intel Celeron 900 @ 2.20 GHz
12.10 black screen.
Latest kernel: Found linux image: /boot/vmlinuz-3.5.0-17-generic
Tryd
acpi_osi=Linux
when booted i change brightness once and
black dissapears and i see all.
CAN
change brightness but doing fn + brightness up gives
Notebook Acer TravelMate 5735Z-452G32MNSS
1) Ubuntu 12.10 (Quantal Queezal):
The parameter i915.invert_brightness=1 fixes the bug! :-)
Step-by-step - beginning from installation:
- Boot with the Ubuntu Live-CD or Live-USB-Stick.
- When the display becomes purple press CursorLeft or CursorRight.
Emachines e525
Intel Celeron 900 @ 2.20 GHz
12.04 black screen.
Latest kernel: Found linux image: /boot/vmlinuz-3.2.0-33-generic-pae
Tryd nomodeset
On booting Ubuntu logo cant see it. All black. When loaded black dissapears and
i see all. Cant change brightness but doing fn + brightness up gives
Emachines e525
Intel Celeron 900 @ 2.20 GHz
12.04 black screen.
Latest kernel: Found linux image: /boot/vmlinuz-3.2.0-33-generic-pae
Tryd
acpi_osi=Linux
On booting Ubuntu logo cant see it. All black. When loaded still black
then i change brightness once and
black dissapears and i see all.
CAN
Emachines e525
Intel Celeron 900 @ 2.20 GHz
12.04 black screen.
Latest kernel: Found linux image: /boot/vmlinuz-3.2.0-33-generic-pae
Tryd
acpi_osi=Linux
Since on booting its still black and i dont know when its started but only
after doing one change of brightness then i added setpci -s 00:02.0
I did the same with my Emachines g525 ubuntu 12.10 64 bit
and i did the edit in rc.local
and the same when suspend the screen is black
problem no. two with this is that sometimes the screen goes into suspend
still after i have set the screenlock to never suspend and in power
setting that nothing
I did the same exact thing and I got the same exact results. I have to
press FN and the left arrow key to get the back light on.
On Thu, Nov 29, 2012 at 2:06 PM, Kenneth Thorell
765...@bugs.launchpad.netwrote:
I did the same with my Emachines g525 ubuntu 12.10 64 bit
and i did the edit in
The issue exists for me in Fedora 17, Ubuntu 12.04, Ubuntu 12.10,
OpenSUSE 12.2, Debian 7, Linux Mint, LMDE, you get it. It's not a
distrobution specific problem. I've tried many different APCI parameters
in the grub menu and none of them have worked. I'm using Sandy Bridge
graphics in an HP 2000
** Changed in: linux
Status: Expired = Confirmed
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Title:
On startup, the backlight is off on laptop
To manage notifications about this
For me the issue is still present in Ubuntu 12.10.
I'm on emachines e725, shortly after the Quantal Quetzel was out, I
tried to boot from the original 12.10 32bit iso (tried out both creating
a live usb and burning cd), was able to get just the black screen. After
modifying the relevant files to
** Changed in: linux
Status: Incomplete = Expired
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Title:
On startup, the backlight is off on laptop
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This bug report is hardly incomplete and certainly not expired, it
affects a huge amount of Ubuntu 12.04 LTS users...
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Title:
On startup, the
Upstream is asking this: Please try i915.invert_brightness=1 module parameter
with kernel version v3.5
or later, see if that fixes the brightness issue, and report 'lspci -vmmnn' if
it does.
The op is taking a long time to reply, that's why they are closing until the
test can be done.
Anyone is
I originally posted a duplicate bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/826386 regarding this
issue.
I recently downloaded Ubuntu 12.10 Quantal Quetzel. I made a startup disk using
a USB flash drive to perform a fresh install and brightness was working out of
the box no extra
I have only booted off the 12.10 32bit iso so far and have not
installed, but the black display problem with the emachines e527 with
the 12.04.1 iso does appear to be resolved out of the box with the
12.10 iso, using no additional kernel parameters or other modifications.
However, while pressing
acpi_backlight=vendor seems to also do the trick here (HP Envy 14). No
need of i915.invert_brightness=1.
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Title:
On startup, the backlight is off
Thank you.
On Sat, Oct 27, 2012 at 10:20 AM, Dario Ruellan
765...@bugs.launchpad.netwrote:
acpi_backlight=vendor seems to also do the trick here (HP Envy 14). No
need of i915.invert_brightness=1.
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Hello,
I just learned that Ubuntu 12.10 has been released. Is the backlight bug
still an issue with this release? On my emachine 525 the backlight goes
out once the update starts to install. I am not able to see to complete
the installation.
Thank you.
On Fri, Sep 28, 2012 at 9:11 PM,
I was having the problem on my eMachines E525, but the solution by
cgonzalez solved this.
To quickly recap what I did:
I added acpi_backlight=vendor and i915.invert_brightness=1 boot parameters.
You add them by changing GRUB_CMDLINE_LINUX_DEFAULT value from quiet splash
to quiet splash
Thank you for that. I will have to take my laptop to someone who can do it
because I have no clue as to how to do it.
Thank you again.
On Thu, Oct 18, 2012 at 3:39 PM, Valter Strods
765...@bugs.launchpad.netwrote:
I was having the problem on my eMachines E525, but the solution by
cgonzalez
Take a lot at
https://help.ubuntu.com/community/BootOptions
I dont' want to be rude, but this isn't a support forum.
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Title:
On startup, the
Thank you.
On Thu, Oct 18, 2012 at 4:07 PM, cgonzalez cmgonza...@gmail.com wrote:
Take a lot at
https://help.ubuntu.com/community/BootOptions
I dont' want to be rude, but this isn't a support forum.
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Disregard my previous report: is not fixed: sometimes instead of 0%
brightness you get 100% on startup.
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Title:
On startup, the backlight is off
On my Acer emachines E725, kernel 3.2.0-31 generic does not fix it.
Same as before. Last kernel to work is 2.6.31-41.
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Title:
On startup, the
HP Envy 14 1xxx
https://wiki.ubuntu.com/druellan/hpenvy1095la
Seems fixed on Ubuntu 12.04 and Kernel 3.2.0-31-generic-pae
Now the backlight is always at 100% on boot. Not ideal but at least avoids the
black screen problem that can be mistaken as a lockup.
version.compiz: compiz
Confirmed on an HP Envy 14 1xxx using Precise.
https://wiki.ubuntu.com/druellan/precise-hpenvy1095la
The backlight is off upon boot on both liveCD and installed systems.
You can solve this by just using the brightness shortcuts on the keyboard, but
the first impression is that the system has
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/765438
** Tags added: laptop-testing
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Had the same issue after upgrading from lucid to precise an HP Pavilion
g6. Solved with:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_osi=Linux
acpi_backlight=vendor
Thanks a lot!
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I also have the same issue on an Emachine E725
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Title:
On startup, the backlight is off on laptop
To manage notifications about this bug go to:
James
Your description is very vague, this aren't patches it's just the latest
Linux kernel. If you found errors related to this i think u can post
them here, but if they're another stuff you should open a new bug.
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I began seeing some error messages while using the patches recommended
by cgonzalez. I've since resorted to downgrading to Ubuntu 10.04.4 LTS
(Kernel: 2.6.32-41-generic x86_64 (64 bit)). Everything works as
designed. No issues whatsoever. Gentoo 's 12.1 live dvd (kernel
3.3.0)and knoppix live dvd
Thanks czonzalez this worked perfectly:
then you have to add to kernel boot parameters:
acpi_backlight=vendor
i915.invert_brightness=1
you can make them permant by editing /etc/default/grub , editing this
line:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_backlight=vendor
Yes my emachines e525 makes when FN+Right arrow
On Tue, Jul 17, 2012 at 8:25 AM, Reid Boyce
765...@bugs.launchpad.netwrote:
There was only one comment about how the Fn+ Right Arrow key, makes this
symbol. ±. Everytime I push it, it makes the symbol. ±. It
doesn't do that for Fn+
There was only one comment about how the Fn+ Right Arrow key, makes this
symbol. ±. Everytime I push it, it makes the symbol. ±. It
doesn't do that for Fn+ Left Arrow key though. Hopefully that will get
resolved as well. I hope that there will soon be a fix for this whole
mess, I have had
Good advice, Chauncellor. Here's the link to the IRC channel for those
who don't have it:
irc://irc.freenode.org/#ubuntu-bugs
Please understand we really appreciate the help, despite the frustration
that sometimes bubbles up.
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** Also affects: linux (Fedora)
Importance: Undecided
Status: New
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Title:
On startup, the backlight is off on laptop
To manage
I followed the directions in this post:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/765438/comments/65
For the first time since I've owned this notebook I'm able to have
ubuntu installed thanks to that post. Every linux distro I've tried
hasn't worked. I've been using linux for 8 years
As this has been tested with the upstream kernel release, it should be
put back to confirmed.
Also, I'm going to take the liberty of marking this importance as
cricital as this is A bug which has a severe impact on a large portion
of Ubuntu users and renders the system unusable (without a very
Now you mark this as critical, has been two long years living with this
f...er.
Anyway the user still have to add the kernel parameter
i915.invert_brightness=1 to boot with a correct brightness. Maybe there's
some way to auto detect this chips and enable it by default.
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I don't appreciate that, cgonzalez. I've had the bug for longer than
most people on here.
To maintain a respectful atmosphere, please follow the code of conduct -
http://www.ubuntu.com/community/conduct/ . Bug reports are handled by
humans, the majority of whom are volunteers, so please bear this
I know, i love Linux like most people from here, i participated a lot
send notices to Kamal about any update i found on the net, but it's very
sad that a bug that may have a lot of people frustrated with using
Ubuntu (and Linux in general), this kind of stuff must be critical at
the beginning not
Afternoon,
I have been following this issue because I have not been able to use my
laptop since April when 10.10 expired.
If I try to install 11.10 on my e-machine now, will I have a backlight? I
have no clue as to how to do the work-a-rounds.
Thanks.
On Fri, Jul 13, 2012 at 1:10 PM,
I think you should get a beta of Ubuntu 12.10 - Quantal Quetzal
http://cdimage.ubuntu.com/daily-live/current/
When it boots add the boot parameter
i915.invert_brightness=1
Install and then make the parameter permanent (as described on my
previous post).
If it works u can tell us...
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Thank you for responding, but would you please provide a little more detail
as to where and how I add the boot parameter? Step by step instructions
would be nice if it's not too much trouble.
Thank you.
On Fri, Jul 13, 2012 at 1:39 PM, cgonzalez cmgonza...@gmail.com wrote:
I think you should
hope it helps
https://help.ubuntu.com/community/BootOptions
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Title:
On startup, the backlight is off on laptop
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Thank you so much, I will try that. :-)
On Fri, Jul 13, 2012 at 3:26 PM, cgonzalez cmgonza...@gmail.com wrote:
hope it helps
https://help.ubuntu.com/community/BootOptions
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15 months later...nothing :-(
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Title:
On startup, the backlight is off on laptop
To manage notifications about this bug go to:
This is a bug report, not a support forum. Please direct any support
questions and solutions for installation and similar activities
elsewhere. There are a lot of people subscribed to this bug and
unnecessary bug mail does nothing but clutter the place up.
To the more hostile: I advise you hop on
** Changed in: linux
Status: Unknown = Incomplete
** Changed in: linux
Importance: Unknown = Medium
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Title:
On startup, the backlight
Comfirmed. On Arch Linux with 3.5rc4 kernel with kernel parameter
i915.invert_brightness=1 all working well.
Yeah! 2 years waiting and finally we have the fix!
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Has been 2 years, but now i found a solutionfor my emachines e725
here is kernel 3.5 rc 4 with all the i915 patches (i think):
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5-rc4-quantal/
install all the needed packages acording to your architectures i386 or amd64,
for example for
Maybe it was
i915.invert_brightness=1
There's a lot of patches for i915 on lkml
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Title:
On startup, the backlight is off on laptop
To manage
I Think this patch will solve the problem:
http://lkml.indiana.edu/hypermail/linux/kernel/1203.1/04090.html
I Hope Kamal can prepare a ppa with it...
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I have actually tried that patch (actually the slightly newer version of
it found here:
http://lkml.indiana.edu/hypermail/linux/kernel/1203.1/04190.html),
without success. (Although possibly I did something wrong.)
I followed the instructions located here:
Hi Kamal,
I know you said no change reports aren't needed, and indeed I see no
change in behavior over the stock 12.04 kernel with the above PPA.
However, I had been using your previous PPA for 11.04 for quite some
time successfully, and I definitely DID see a change in behavior from
the stock
I have prepared a PPA test kernel for Ubuntu 12.04 (Precise) which
includes experimental patches that might fix these inverted backlight
brightness or backlight off at startup problems, for laptops with
Intel GPU's (despite the name of the PPA, rest assured that the
brightness control fixes are
If there is a work around to this issues would someone* please* be so kind
and write the instructions in common every day English so that I can use my
laptop. 10.10 is no longer supported and I have not used it since. I
really do need it for school. Thank you.
On Thu, May 24, 2012 at 5:23 PM,
This problem still persists. It's extremely annoying. When ubuntu boots
up, all I can see is a very dimly lit screen. I can't see anything
really. It's ridiculous. Every release which comes out I hope this
problem will be fixed and it still persists. Why wont you guys take this
bug seriously? I'm
I FOUND bug
needs confirmation
i just tested witch works and since when doest until 4 in row from
http://kernel.ubuntu.com/~kernel-ppa/mainline/
Confirm by installing kernels
No this bug using:
[DIR] v2.6.36.4-natty/18-Feb-2011 11:34 -
TESTED Mainstream Upstream Kernel Linux 3.4.0-030400rc6-generic
Also tested Kernel Linux 3.4.0-030400rc6-generic-pae
still exists
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Title:
On
And pressing FN+LightUp keys i get symbol ±
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On startup, the backlight is off on laptop
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10.04 (bet distro evr) working
But this bug i have this sine 11.04 bug 889586 bug 912046 bug 950919 bug 950915
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Title:
On startup, the backlight
I am on a Gateway NV78 and have gotten both Linux Mint 11 and 12 to boot
flawlessly using this thread. Here is what I did.
Enter i915.broken=1 into command line to make install.
Post #42: Based on the info available here and how to set up a script to
run during the startup process and the
@Vladimir Kravets: If there's acer-wmi present in your
/sys/classes/backlight (and in my case it is when I'm booting with
acpi_backlight=vendor parameter), you might want to blacklist acer_wmi
module
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Blacklisting acer_wmi doesn't change anything:
with acpi_backlight=vendor
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Title:
On startup, the backlight is off on laptop
To manage
...continued(sorry)
with acpi_backlight=vendor i have inverted brightness
without i have the brightness fixed at minimun (i have to use the setpci
command)
i'm on emachines e725 with kamal inverted brightness Kernel.
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In my case blacklisting acer_wmi with acpi_backlight=vendor on e725 was
neccessary to have backlight control using fn-keys, xbacklight, power-
manager, etc via intel_backlight interface. (Controls were inverted, I
didn't try inverted-backlight kernel yet though)
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I have prepared a PPA test kernel for Ubuntu 11.10 (Oneiric) including a
patch which might address the inverted backlight brightness or
backlight off at startup problems, for laptops with a Intel GPU's
only:
https://launchpad.net/~kamalmostafa/+archive/inverted-backlight
Feedback to this bug
On my laptop eMachines e725 this kernel do nothing =( Keys for control
brightess is not working, brightness is turn off during start up.
Set up below kernel boot properties:
acpi_blacklight=vendor quiet splash
The old boot properties:
acpi_osi=Linux quiet splash
- With new boot properties
Sorry forgot about that this was checked with kernel taken from
https://launchpad.net/~kamalmostafa/+archive/inverted-backlight
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/765438
Title:
On
Also tried kernel from https://launchpad.net/~kamalmostafa/+archive
/inverted-backlight
No deal here...
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https://bugs.launchpad.net/bugs/765438
Title:
On startup, the backlight is off
@Skeewiff: I am sorry but I can't make it work. Probably because I am an Linux
ignorant. Could you please make a tested recipe on what to do and maybe also a
small explanation on what each line does.
Thanks in advance!
regards Jens Elbaek
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