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 b
The problem persists in 14.04. The solution in comment #96 still does
not resolve the issue for me.
I can confirm Rahul's observation in #116. Adjusting the brightness
before the kernel loads works. Adjusting after that freezes the system.
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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.
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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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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Title:
brightness adjusting crashes system
Status in “fglrx-in
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 card
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 likel
I've managed to get this bug solved!
The answer is here:
http://ubuntuforums.org/showthread.php?t=2181534&p=12819813#post12819813
Create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the
following content:
Section "Device"
Identifier "card0"
Driver "in
I've managed to get this bug solved!
The answer is here:
http://ubuntuforums.org/showthread.php?t=2181534&p=12819813#post12819813
Create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the
following content:
Section "Device"
Identifier "card0"
Driver "intel"
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 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:
b
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 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 a
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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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"
sa
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 reache
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 key
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
> b
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 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
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 syste
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
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
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
ac
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 th
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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