Related to Bug #810093??
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https://bugs.launchpad.net/bugs/756509
Title:
N130 flickering backlight on startup
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*** This bug is a duplicate of bug 810093 ***
https://bugs.launchpad.net/bugs/810093
** This bug has been marked a duplicate of bug 810093
The new (2.6.39+) samsung_laptop kernel module causes serious backlight
flickering - makes the desktop unusable
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After I upgraded my Samsung N130 to 11.10, system became unusable
because the flickering become much more frequently and pressing Super
key would not stop it any more. So I installed samsung backlight from
the voria PPA and it fixed the problem. Tks.
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I have a Samsung N-130
I upgraded to 11.10 from 11.04. The flickering screen in 11.10 was worse than
11.04.
My Solution.
I installed :
Samsung Backlight Samsung tools
The flickering persisted
I then added the following to the Grub Menu by editing
/boot/grub/grub.cfg
noapic nolapic apci=off
After reactivating the deb http://ppa.launchpad.net/voria/ppa/ubuntu
oneiric main source and updated samsung backlight package... this
problem got fixed for me in current 11.10 beta
Thanks again Fortunato...
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On Samsung N130 flicking on 11.10 beta2.
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https://bugs.launchpad.net/bugs/756509
Title:
N130 flickering backlight on startup
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Is it only a problem with the i915 driver?
Maybe the bug has to be renamed to: i915 flickering backlight on startup
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https://bugs.launchpad.net/bugs/756509
Title:
N130 flickering
Samsung N130 installing 11.10 beta 1 - flicking occurs during the
install process.
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Title:
N130 flickering backlight on startup
To manage
Same here, I'm running 11.04, on a Samsung N130.
Backlight flickers continuously on login (not login screen), until I
fudge the backlight hotkeys.
I tried adding acpi_backlight=vendor to GRUB_CMDLINE_LINUX_DEFAULT,
but no luck (although I'm running BURG), no luck.
The samsung-backlight package
Thank you Fortunato for your help so far.
I have a N130 running Natty 11.04, and have tried each step you
mentioned in post #15. Unfortunately to no avail.
My screen flickers intermittently at the login screen on startup and
during general use. There doesn't appear to be trigger, however when I
@everyone,
your workaroundy solutions with samsung-backlight are all nice and cute, but
please bear in mind that not only Samsungs are affected!
Laptops from MSI (PR200, Wind) have the same problem. Using
acpi_backlight=vendor stops the flicker, but also disables any kind of
backlight control,
If samsung-backlight causes the problem it should be related to
https://launchpad.net/~voria/+archive/ppa
Maybe Fortunato has an idea on that prob...
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I added samsung-backlight to /etc/modprobe.d/blacklist.conf and
rebooted.
Now flickering disappeared and backlight function keys are still
working.
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The situation with the brightness control is a complete mess at the moment and
it's getting very annoying.
Unfortunately, I only have a Samsung NC10 and the brightness control here is
working out-of-the-box, with no need to use the samsung-backlight kernel
module, and I'm unable to investigate
With the first three steps
- remove 'samsung-backlight'
- add the acpi_backlight
- install 'samsung-backlight'
I got the brightness controll work fine on my N150, without any flickering when
natty dim the screen on idle.
Thank you Fortunato.
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@Fortunato:
After half a day flickering began again and I did all steps Fabz did
before.
Currently my n130 is running fine and function keys are working.
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Also with 10.10 and regular kernel was not this problem; backlight Fn-
keys never did nothing on 10.10 though, i had to rely on custom setpci
script.
Maybe somebody knows how to disable backlight management in Xorg as a
quick fix ?
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Same here on a samsung N150+
This is for me new to 11.04, i did use 10.10 with custom 2.6.37 kernel
before and had not this serious problem.
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** Changed in: linux (Ubuntu)
Status: New = Confirmed
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Title:
N130 flickering backlight on startup
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Quick fix:
for now i did add this line to /etc/modprobe.d/blacklist.conf :
blacklist samsung-backlight
you ca
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https://bugs.launchpad.net/bugs/756509
Title:
N130 flickering
after reboot it seems to solve it. Backlight hotkeys don't work though,
but you can try the attached script to adjust backlight when needed.
This works on samsung N150+, don't know for others...
** Attachment added: backlight management script for samsung N150 and
potentially others
same here with MSI PR200
might be related to the fact that the laptop is sending brightness keys
via two different event devices (apparently one is corresponding to
keypresses and the other is videocard events). there is a long-standing
bug about bad handling of hardware keys and related spam in
Agreed. This happens on my N130 as well - and only in Natty. Windows 7
is fine, and Maverick was fine. It did it in the prerelease when I
tried it, and in the beta, and still in the release version. It's not
nice.
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I also the same problem, but with my Samsung N140 and I am running the
Full Released version of 11.04
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Title:
N130 flickering backlight on
I have the same problem on Samsung N130 both in Ubuntu and Arch with
kernels = 2.6.37
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Title:
N130 flickering backlight on startup
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Same problem here with a MSI Wind clone, backlight flickering and system
kind of unresponsive untill i manage to click start button or some of
the system tray icons, then flickering stops. It will start again if I
try to set backlight brightness with laptop buttons, or when it attempts
to dim the
This is a serious problem.
I left my netbook, came back, the screen had been flickering erratically
for about an hour.
I'm taking since this is prerelease software I can't hold Conical
responsible for damage to my netbook backlight?
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** Attachment added: This comes up, jumping about when the backlight goes
nuts. Happened whilst I had my fingers off the keys for a bit... I think it
might have been trying to dim the backlight.
Same problem with a Samsung n220
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https://bugs.launchpad.net/bugs/756509
Title:
N130 flickering backlight on startup
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** Package changed: meta-kde (Ubuntu) = linux (Ubuntu)
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Title:
N130 flickering backlight on startup
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