W510 Screen Brightness Keys Disabled

Hi,
I often hibernate my W510 and some times when I start her up again, the brightness function keys refuse to work. Other function keys seem to work ok. It's a real pain if I'm trying to conserve battery and the brightness is on full (notably it doesn't automatically switch to a lesser brightness either when this fault occurs).
Anyone else experience this?
Regards
Andy Wu

Another thing to note besides the fact that this only affects the brightness controls, is that the controls are affected regardless of whether I am plugged into AC power when I bring my laptop out of hybernation. Also, rebooting the system doesn't fix the problem. I have to physically shut off the system and power it back on to resolve the problem. I don't need to remove the battery, but the system does need to be completely turned off.
Does anyone know if the Lenovo techs are aware of this problem?

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Direct you to the proper forum for MacBook :
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Resetting the System Management Controller (SMC)
Summary
In some situations, you may need to reset your computer's SMC. Learn how to identify these conditions and reset the SMC.
Products Affected
Desktop Computers, Portable Computers
Note: It is possible that the SMC could encounter an issue that may cause unusual system behavior typically related to the symptoms described below. In some cases, resetting the SMC may be the only correct method to resolve the issue, however, an SMC reset should only be attempted after all other standard troubleshooting has been performed.
Before Resetting the SMC
Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.
Press Command + Option + Escape to force quit any application that is not responding.
Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
Restart your Mac by by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
Shut down your Mac by by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.
If your Mac appears to be running normally but isn't responding, force the computer to shut down by pressing and holding the power button for 10 seconds. Note: You will lose any unsaved work in any open applications. For Mac portables experiencing issues related to the MagSafe power adapter and/or battery, try:
Unplug the MagSafe power adapter from the Mac and the wall power socket for several seconds.
Shutdown the Mac. Physically remove and re-insert the battery (if it's removable) and startup the Mac.
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Fans
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The Status Indicator Light (SIL) appears to behave incorrectly (on Mac computers that have an SIL).
Battery indicator lights, if present, appear to behave incorrectly (on portables that use non-removable batteries).
The display backlight doesn't respond correctly to ambient light changes on Mac computers that have this feature.
Power
The computer doesn't respond to the power button when pressed.
A portable Mac doesn't appear to respond properly when you close or open the lid.
The computer sleeps or shuts down unexpectedly.
The battery does not appear to be charging properly.
The MagSafe power adaptor LED doesn't appear to indicate the correct activity.
System Performance
The computer is running unusually slowly although it is not experiencing abnormally high CPU utilization.
Video
A computer that supports target display mode does not switch into or out of target display mode as expected.
A computer that supports target display mode switches into or out of target display mode at unexpected times.
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Resetting the SMC on Mac portables with a battery you can remove
Resetting the SMC on portables with a battery you should not remove on your own
Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
Additional Information
The System Management Controller (SMC) is responsible for many low-level functions on Intel-based Macs. These functions include:
Responding to presses of the power button
Responding to display lid opening and closing on portable Macs
Battery management
Thermal management
The SMS (Sudden Motion Sensor)
Ambient light sensing
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Status Indicator Light (SIL) management
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I am running Mint 9 and Ubuntu 10.04 on my S10-3. Very happy with the platform overall, but as many have found their screen brightness keys do not work. My web research indicates that the latest kernels will have a fix, but that probably won't be commonly available until the end of 2010. In the mean time I have implemented the following to get easy control over the brightness. It's not perfect but it gets the job done. Create three launchers on the desktop with one each of the following commands. Select the screen brightness icon and title each launcher as Low, Med , High Low> sudo setpci -s 00:02.0 f4.b=35 Med> sudo setpci -s 00:02.0 f4.b=55 High> sudo setpci -s 00:02.0 f4.b=75 credit to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/538256 http://lgallardo.com/en/2010/08/31/control-del-brillo-de-lenovo-s10-3-video-gma-3150-on-linux/

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I am beginning to become unhappy with my new Thinkpad Twist. The laptop was just delivered and no changes to the setup were made.
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Go to Solution.

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[SOLVED] ASUS Screen Brightness Not Working

I have been trying for a few hours to get my screen brightness to work properly. I'm on an ASUS Zenbook Prime UX31A with kernel 3.9.6-1. I'm using efibootmgr to boot.
According to the wiki page and numerous posts, I need to use the acpi_osi="!Windows 2012" boot parameter. When I set it using efibootmgr, the keyboard backlight keys work (Fn+F[34]), but the screen brightness keys (Fn+F[56]) do not work. I have tried the following in efibootmgr:
# efibootmgr -c -w -d /dev/sda -p 1 -L "Arch Linux" -l '\EFI\arch\vmlinuz-arch.efi' -u initrd=EFI/arch/initramfs-arch.img root=UUID=d0b32080-84f0-4c6b-933b-f62b880afc09 ro rootfstype=ext4 efi_no_storage_paranoia elevator=noop acpi_osi=Linux add_efi_memmap
# efibootmgr -c -w -d /dev/sda -p 1 -L "Arch Linux" -l '\EFI\arch\vmlinuz-arch.efi' -u initrd=EFI/arch/initramfs-arch.img root=UUID=d0b32080-84f0-4c6b-933b-f62b880afc09 ro rootfstype=ext4 efi_no_storage_paranoia elevator=noop acpi_osi=intel add_efi_memmap
# efibootmgr -c -w -d /dev/sda -p 1 -L "Arch Linux" -l '\EFI\arch\vmlinuz-arch.efi' -u initrd=EFI/arch/initramfs-arch.img root=UUID=d0b32080-84f0-4c6b-933b-f62b880afc09 ro rootfstype=ext4 efi_no_storage_paranoia elevator=noop acpi_osi= add_efi_memmap
and a few others. The particularly peculiar thing is when I use a UEFI shell to boot with my script:
echo -on
\EFI\arch\vmlinuz-arch.efi root=UUID=d0b32080-84f0-4c6b-933b-f62b880afc09 ro rootfstype=ext4 add_efi_memmap efi_no_storage_paranoia initrd=EFI/arch/initramfs-arch.img elevator=noop acpi_osi="!Windows 2012"
it works fine (both keyboard backlight and screen brightness).
What am I doing wrong? My hunch is that I'm doing something wrong with the formatting of acpi_osi="!Windows 2012" but I'm pretty sure I've tried every combination of different quotes and escaping different things. It's also worth nothing that the "!" gets interpreted by bash in some of these permutations making efibootmgr not actually run.
Last edited by tobit (2013-06-30 02:37:30)

WonderWoofy wrote:
Because you are entering it in a shell, you need to escape some of the things in the acpi_osi="!Windows 2012" string. So for example, the double quotes are intended to be entered exactly as is in the resulting efibootmgr entry, so these should be esacped since they would otherwise have a special meaning in the command line. The same is true for the exclamation point. So I think you would have to do:
efibootmgr -c -w -d /dev/sda -p 1 -L "Arch Linux" -l '\EFI\arch\vmlinuz-arch.efi' -u "initrd=/EFI/arch/initramfs-arch.img root=UUID=d0b32080-84f0-4c6b-933b-f62b880afc09 ro rootfstype=ext4 efi_no_storage_paranoia elevator=noop acpi_osi=\"\!Windows 2012\" add_efi_memmap"
BTW, this is just a copy/paste of one of the entries above (slightly fixed). I added a '/' to your initrd entry, as it is supposed to be an absolute path, not a relative one.
Edit: I too started out with a direct efibootmgr entry when getting to know UEFI. But I think that a better solution is to use a boot manager. I like gummiboot, but I also keep rEFInd set up as well. By doing this, if you ever want to chane something on your kernel command line, you can just edit the config before reboot. But I think that were it is really useful is if you need to modify the kernel command line before you boot, as it is not possible with a direct efibootmgr entry. If you want to make it seem seamless, just set the timeout to zero in efibootmgr, and then if you want to get to the menu, you just hold the spacebar while booting.
The reason I wanted to use a direct efibootmgr entry was because I thought it would be faster. But because gummiboot and systemd will actually give you the time it takes to boot which includes the time in the firmware (POST) as well as the time it takes to get through the boot manager, I have actually found that my system takes a whole 14ms from the end of POST to starting to load the kernel.
Edit2: BTW, I also quoted the entire srting of arguments on the kernel command line, which it need in order to be fed to the '-u' option as a single string.
I'm afraid that still doesn't work. I've tried similar things and tried that specifically. In case you're wondering, the command you listed gives me the following output:
$ sudo efibootmgr -v
BootCurrent: 0000
Timeout: 2 seconds
BootOrder: 0000
Boot0000* Arch Linux HD(1,800,96000,bee2185e-de97-4dc0-9614-830639991bc3)File(\EFI\arch\vmlinuz-arch.efi)i.n.i.t.r.d.=./.E.F.I./.a.r.c.h./.i.n.i.t.r.a.m.f.s.-.a.r.c.h...i.m.g. .r.o.o.t.=.U.U.I.D.=.d.0.b.3.2.0.8.0.-.8.4.f.0.-.4.c.6.b.-.9.3.3.b.-.f.6.2.b.8.8.0.a.f.c.0.9. .r.o. .r.o.o.t.f.s.t.y.p.e.=.e.x.t.4. .e.f.i._.n.o._.s.t.o.r.a.g.e._.p.a.r.a.n.o.i.a. .e.l.e.v.a.t.o.r.=.n.o.o.p. .a.c.p.i._.o.s.i.=.".\.!.W.i.n.d.o.w.s. .2.0.1.2.". .a.d.d._.e.f.i._.m.e.m.m.a.p...
I also tried putting the -u argument in single quotes so that I don't have to escape the double quotes or the !. That also didn't work. Thanks for your suggestions, I'd be happy to try more, I've tried a lot already to no avail :-(
count0 wrote:On my Asus X201E, the screen brightness keys only work when I add "acpi_osi=" to my kernel parameters, with no arguments. You could try that.
That's the third option I say that I tried in my original post.

Cannot Adjust Screen Brightness with Fn Keys on New L540 (8.1 x64)

Hello everyone. I just purchased a new L540 with Windows 8.1 x64 on it and have run into a problem I'm seeing is apparently common. While my other Fn keys work as intended, I cannot adjust screen brightness with them. Pressing the buttons just does nothing and the laptop is running at full brightness at all times, even when on the battery. I have installed the latest Power Management Driver and from what I can tell, there is no version of the Power Management Software for anything newer than Windows 7. I also have installed the latest Hotkey driver (in fact, I've installed all the latest drivers for this machine.) I read in another thread that this can be caused by the latest HD Graphics driver from Intel but I actually can't even install that driver (says my system is not supported) so I am still using the latest Lenovo provided driver.
Can anyone please assist with this? I want to be able to quickly adjust screen brightness when on battery but I can't do that at present. Thanks!
Solved!
Go to Solution.

I have the same problem with my L540. It started with the update of the BIOS to version 1.65. Because I didn't find a solution, I went back to BIOS version 1.64, where all the brightness options are there and work properly.
You can download older versions. When on the page with the new drivers (http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS037285) go to BIOS Driver 1.65, then choose "learn more". At the end of the following page you'll see all the older versions.
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I am unable to change my screen brightness using the fn+f2/fn+f3 keys. i understand that it can stil

I am unable to change my screen brightness using the fn+F2/fn+F3 keys. I understand that it can still be adjusted differently but I want this way to work. Also whenever I change my volume using the fn+F7/fn+F8/fn+F9 keys, the little on-screen display doesn't pop-up any more. I would like to fix this and any help would be greatly appreciated.

Hi
You have a couple of options as I see it please find the web link given below and the steps might help you to fix your issue on the unit.
Resolving Problems with the Brightness of the Display
Let us know how it goes!
*Although I am an HP employee, I am speaking for myself and not for HP.
****Click the White Kudos star to say thanks****
****Please mark Accept As Solution if it solves your problem****
Regards
Manjunath
Let us know how it goes!
"I work for HP."
****Click the (purple thumbs up icon in the lower right corner of a post) to say thanks****
****Please mark Accept As Solution if it solves your problem****
Regards
Manjunath

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My laptop is not in warrenty anymore, it ran out after i got it back the second time. I was too busy with work and i needed to use the laptop so i couldnt really sort anything out.
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nobody can help??

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