This is happening on my Lenovo T510 which uses Nvidia so I don't think
the video driver has anything to do with it. This bug (for me) is also
the worst kind in that it's intermittent. Tonight, the system locked up
when I forgot about this problem and it hosed a partition that was in
the middle of
one workaround i been using for quite sometime now, is to decrease the
backlight before the kernel boots.
i.e. the system waits on grub bootloader for 5-10 seconds for any
distribution i used. dimming the display then bypasses this issue... :)
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I believe I have successfully solved the bug now by reading all the
comments again and found a solution in #96. I added
echo 0 /proc/sys/kernel/nmi_watchdog
before exit 0 in the file etc/rc.local. I have used the system a few
hours/days/re-starts/hibernates since and no bug has occured by now.
Hey, is there any chance this is going to be resolved soon? My system
(Ubuntu Studio 10.04) basically renders itself more and more useless
everyday and I can't upgrade because of this bug. I tried
- Ubuntu 12.04
- Linux Mint 13 and Linux Mint 15 (both Cinnamon)
- Fedora 20
- Ubuntu Studio 12.04
-
** Also affects: fedora
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1007765
Title:
brightness adjusting crashes system
Status in
Hello to you all!
I am showing up here because I have the same issue. I found this thread this
morning after blaming the hardware on my notebook for a year but rethinking
this to be a software issue this morning. I will try out the solutions here to
contribute on this this evening.
Please, how
I've managed to get this bug solved!
The answer is here:
http://ubuntuforums.org/showthread.php?t=2181534p=12819813#post12819813
Create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the
following content:
Section Device
Identifier card0
Driver intel
I've managed to get this bug solved!
The answer is here:
http://ubuntuforums.org/showthread.php?t=2181534p=12819813#post12819813
Create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the
following content:
Section Device
Identifier card0
Driver intel
Unfortunately, the solution that worked for George does not work on my Lenovo
ThinkPad W530, running Ubuntu 13.10.
After trying to adjust brightness, I see the brightness graphic on the screen,
and the system freezes immediately.
This laptop has NVidia - Intel hybrid graphics, so the bug is
Dear George, I am quite sure, this does not fix the problem. I
investigated this in deep now, let me elaborate on this. At first I
forgot to mention, my system is entirely a 64bit one, may be this is
importand. Secondly, I have only one AMD/ATI HD4500 card build into my
notebook as a graphincs
I have Dell Integrated Graphics Card and don't understand what echo 0
/proc/sys/kernel/nmi_watchdogdoes.
I'm really fed up with this bug.
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I've read comment #96 and now I know what echo 0 /proc/sys/kernel/nmi_watchdog
does.
Still, it didn't work for me.
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Title:
Adding acpi_backlight=legacy fixed it for me under Ubuntu 13.10. (Dell
N5010, IntelHD)
'gksu gedit /etc/default/grub'
add acpi_backlight=legacy to GRUB_CMDLINE_LINUX_DEFAULT=quiet
splash line so it'll look like this:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_backlight=legacy
save and
Still no luck for me on Dell N5010, running Kubuntu 13.10:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash acpi_backlight=legacy
didn't work...
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I fresh installed Ubuntu 13.10, so it was using free drivers by default. And it
crashed when I tried to change brightness rapidly. So I think the bug is not
present in fglrx-installer. Now I am using AMD drivers, but my brightness
control doesn't work properly, it either increases or decreases
I never had this bug until yesterday. acpi_backlight=vendor and/or the
echo 0 /proc/sys/kernel/nmi_watchdog solution didn't work for me. I
couldn't install the latest mainline kernel, because of my restricted
broadcom WiFi driver I'm depending on.
Workaround for me was: Disable Virtualization
Hi,
On Fri, Aug 23, 2013 at 04:09:46PM -, Aditya wrote:
Hi,
by different I mean that the system freezes in both the situations, with
nmi_watchdog enabled and disabled, and this happens as soon as I soon as I
change the brightness levels, and this is the reason I actually reached this
Thanks Marwan for the detailed description of the bug.
I just posted this as a fix for the users who were unable to change brightness,
and I had no idea how deep the roots of this bug are.
In my case, both acpi_video0 and acpi_video1 do not work, i.e. the brightness
does not change and the
On Fri, Aug 23, 2013 at 09:05:34AM -, Aditya wrote:
Thanks Marwan for the detailed description of the bug.
You're welcome.
I just posted this as a fix for the users who were unable to change
brightness, and I had no idea how deep the roots of this bug are.
And, I don't blame you. I just
Hi,
by different I mean that the system freezes in both the situations, with
nmi_watchdog enabled and disabled, and this happens as soon as I soon as I
change the brightness levels, and this is the reason I actually reached this
bug report.
Thanks,
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On Fri, Aug 23, 2013 at 04:09:46PM -, Aditya wrote:
Hi,
by different I mean that the system freezes in both the situations, with
nmi_watchdog enabled and disabled, and this happens as soon as I soon as I
change the brightness levels, and this is the reason I actually reached this
bug
Marwan, your workaround did in fact fix the problem for me.
I'll add that when I tried your workaround (echo 0
/proc/sys/kernel/nmi_watchdog), I REMOVED acpi_backlight=vendor (which
I already had) at the same time. I rebooted and both problems were
fixed: I could change the backlight using my
May be the community is looking for the solution in the wrong direction.
Looking in /sys/class/backlight/ lists 3 folders on my Dell inspiron 7520.
One of the folders is intel_backlight .
Manually doing
root@Sirius:~# echo 2000 /sys/class/backlight/intel_backlight/brightness
works.
This means
On Thu, Aug 22, 2013 at 06:10:50PM -, Aditya wrote:
May be the community is looking for the solution in the wrong direction.
Well, I will elaborate on this bug once and for all.
First of all, we can't blame the Linux kernel for this bug, because it is
firmware-specific.
firmware-specific
This is an update to my post No.93... Not a single time i have have faced any
problem with the brigtness button :
after SPARX No.17 comment ( sorry for saying that it was Marwans)
This bug is FIXED for me by adding these kernel options:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash pcie_aspm=force
I am using debian wheezy... Cannot find a better discussion on this
Brightness Bug in the whole world awesome effort here..
I have Dell Inspiron N5010 , Core i3, 4 GB RAM AND INTEL HD
After updating to 3.2.xx the system starts hanging when the brightness
was adjusted. I googled and found
For those of you using Inspiron:
Marwan's solution worked for me.
I'm using 'GRUB_CMDLINE_LINUX_DEFAULT=quiet splash pcie_aspm=force acpi=off'
in my /etc/default/grub file.
and I've added 'echo 0 /proc/sys/kernel/nmi_watchdog' to my /etc/rc.local file.
(Thanks, man!)
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