HP ProBook 4510s: Can't adjust screen brightness

It seems to be a recurrent problem and I try everything I can to solve this by myself but I do not have any solution left so here it goes.
I have installed archlinux and gnome 3, everything is up to date but I can't set the screen brightness (I am using the xf86-video-ati drivers with a Radeon mobility HD4300). I can't set it via the gnome control center, via xbacklight or setpci. When I try the fn keys, I get this message:
"No backlights were found on your system",
By googling, I tried to add the acpi_backlight=vendor and acpi_osi=Linux or acpi_osi="" to the kernel line but still the same message. I installed the linux-kamal kernel but still not working. I have no entry in /sys/class/backlight and no video folder in /proc/acpi so I can't set the brightness with echo <some value>.
Maybe someone could help me since I don't know what to do now and the brightness is locked to 100%, really hurting my eyes.

http://www.linlap.com/wiki/hp+probook+4510s
http://www.linlap.com/wiki/hp+elitebook+8460p
Try to disable acpi boot kernel with option “acpi=off” .
When it works, there must be bug in BIOS or ACPI on at model,

Similar Messages

Re: Satellite L855 and Windows 8 - can not adjust screen brightness

Hi everyone !
I installed Windows 8 on my Satellite L855 and it is running pretty well except that I can no more adjust screen brightness !!! I updated all the drivers for Win 8 but it didn't resolve the issue.
Hope someone can help me !! Thanks !!

Hi
Did you install the VAP (value added package) provided with Toshiba Win 8 upgrade assistant?
Its necessary and the brightness can be controlled pressing F button
F2 Decreases screen brightness
F3 Increases screen brightness

Can't adjust screen brightness.

On my Tecra R840-S830, I recently reinstalled Windows 7 64 bit and I thought I installed the drivers I needed. My flashcard functions are working perfectly except that FN-F6 and FN-F7 will not adjust the screen brightness. I can also find no other way to adjust the brightness-It doesn't appear in power options or display settings. Any ideas? Am I missing a specific driver?

Tecra R840-S830
Maybe this one?
Tecra R840-S8430
Instead of struggling to get the install order correct, you should restore the hard disk to its original out-of-the-box contents using Toshiba recovery media.
-Jerry

Can't adjust screen brightness on Acer Aspire One anymore

It used to work before, but now that kernel26-one-dev is really outdated, I've started using the standard Arch kernel26 package. I can't adjust brightness with the fn keys, and GNOME's brightness adjustment applet says it's unable to get laptop brightness read.
I guess it could be acpid related, /sys/class/backlight/ is empty, but I'm currently doing a full system upgrade and will update the thread if that solves it.

Hello myizham,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you are having issues adjusting the screen brightness on you HP Envy 23 Beats Edition All in One PC. I would be happy to assist you, but first I would encourage you to post which operating system you are using. And whether your operating system is 32-bit or 64-bit as with this I can provide you with accurate information.
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the requested information and I would be happy to provide you with assistance. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

Can't Adjust Screen Brightness on my HP Envy 23 Beats Edition All in One PC

I can't adjust the screen brightness on my PC after updating windows. I already updated all the drivers software but the problem is not solved. Please HELP..the brightness is killing me...TQVM

Hello myizham,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you are having issues adjusting the screen brightness on you HP Envy 23 Beats Edition All in One PC. I would be happy to assist you, but first I would encourage you to post which operating system you are using. And whether your operating system is 32-bit or 64-bit as with this I can provide you with accurate information.
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the requested information and I would be happy to provide you with assistance. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

Can't Adjust Screen Brightness MBP 2010

Hi everybody, this issue is driving me nuts!
I've browsed all the sections on this forum and numerous threads and still no dice... Here's my issue:
-I own an late 2010 MacBook Pro (iOS dev machine), which was working perfectly up to the point where I had to update to Mountain Lion 10.8.5
After the update, brightness control on the keyboard is gone (F1 and F2 are duds), also no manual control anywhere else...what gives??
I've done all the SMC reset mumbo-jumbo without any avail....seriously, it sounds like the old fix for windows 98..."just reboot and it will be fine...or not". I also won't accept "go to a genious bar" as answer, since that doens't exist on these parts and any "procedure" over a apple device will take over a month to be done with.
So my questions are:
1-What where they thinking when they removed the frigging slider from settings?? Do they take us for some sort of idiots that can't be trusted to handle their brightness without using the keyboard?
2-Why can't I change the brightness on my $2500 laptop after a software update? Pray, do explain how this has come to be?
3-Is there any command (using terminal) that I can run to permanently set the brightness level or just to, you know...change it?
4-I'd like to scale this issue with a formal complaint towards apple, I find this to be unacceptable as a customer and I'd like to give them a piece of my mind. Can someone point me out on the proper path to do this?

Hi Clarinet187,
Welcome to Lenovo Community Forums!
As per the query you are facing issue with screen brightness for your ThinkPad T500.
Please go to start and type device manager, open device manager and check if there is any yellow mark in any of the adapter.
Please click here to get the complete steps on the issue.
Hope this helps.
Best regards,
Hemanth Kumar
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

I can't adjust screen brightness

It happens the first time, when I hit F1 and F2 to adjust the brightness, the icon shows only one notch at the dimmest, the screen is at the brightest setting, hit F2 nothing happened, it stayed the same, reboot and it works again. Any idea? Thanks

It's happened to me the once. For me a restart resolved it and suspect putting my MBP back to sleep and waking again would too but anyway.
What appears to be happening is that when your MBP wakes it is failing to recognise the state of your display brightness when it is put to sleep so in a state on confusion it just sets itself at max brightness. The problem arises when software think the display is not at max brightness and get errors when it tries to raise brightness.
I've since reported this to Apple so hopefully something will come of it.

Updated to windows 8.1 now can't adjust screen brightness

Basically I have been avoiding this update for a while now because I was quite happy with my hp laptop without it, but then a couple days ago my laptop decided to do the update automatically. So everything was fine until it rebooted and I realised my sound control buttons and brightness buttons had stopped working completely. I sorted the sound control easily on one of these forums but I have been having so much trouble trying to fix the brightness controls. This is really annoying me as the brightness is turned up fully and it is really hurting my eyes.
I have tried updating both the 'AMD Radeon HD 7600M Series' and the 'Microsoft Basic Display Adapter' on the device manager which has not worked at all.
Please can someone help!

Hi @gsh987 ,
Thank you for visiting the HP Support Forums and Welcome. I have looked into your issue about your HP Notebook and the brightness control on Windows 8.1 not working correctly after an update. I would uninstall all the display adapters that are in the device manager and restart the Notebook. Check to see if if it put an adapter back in , right click on the driver and update.
If that does not help I would uninstall the Graphics drivers restart the Notebook and it should reinstall the correct driver for you.
Here is a link to the HP Support Assistant. Just download and run the application and it will help with the software and drivers on your system that need updating.
I would be happy to assist if needed. How Do I Find My Model Number or Product Number?
Please let me know.
Thanks.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

Can't adjust screen brightness on Windows 7

Running on my late 2011' MacBook Pro 15" with Windows 7 Home Premium 64-bit Service Pack 1. I have an AMD Radeon HD 6750M graphics card. I have tried uninstalling the driver and what not. I can't seem to find a catalyst that will work. It always tells me that I don't have a proper graphics adapter.
This is my 3rd time posting this, I'm hoping someone will have an answer.

Well, I should elaborate more on the methods I have tried. (Also I am using a MacBook Pro, however that doesn't matter really) I have tried uninstalling my graphics card driver in 'Device Manager', I have tried using catalyst to install the driver (I'm using an AMD Radeon HD 6750M), I have downloaded 'Windows Support' through Bootcamp and have reinstalled Bootcamp on Windows 7 and tried using the drivers provided but nothing has worked. I have even tried this, Control Panel > User Accounts > Change User Account Control settings > slide control to 'Never notify' > Reboot, with no luck.
Also, thank you for the response.

How adjust screen brightness in Windows 7?

I used to use a Windows 98 laptop up to 3+ years ago, but since moving to Mac have largely forgotten how Windows works. I now have Windows 7 on Bootcamp and can't see how to adjust screen brightness. Surely there should be an adjuster on the System Tray (that's what it used to be called) bottom right next to the clock. I'm on 20" iMac with Apple keyboard (the long one with number pad at the right).

Does the keyboard have brightness controls on the F keys?
If these do not work: try holding fn and using the F keys.
If that does now work I have to ask: have you installed the bootcamp software? you need to make a CD (or usb stick) of drivers and software from OSX then boot into wiondows and run it.

Have Upgrade Graphic Card Driver, But Still Cannot Adjust Screen Brightness and Sleep Button Not Showing After Clean Installation of Windows 8.1

I have done clean installation of Windows 8.1 on my HP Pavilion G4.
Then I realize that I cannot put my computer on sleep mode and cannot adjust screen brightness.
I understand that those problems caused by the graphic card driver.
My computer is running on AMD Radeon HD 6400 series.
Thus, I manually search on internet and found a latest graphic card update on microsoft site that is claimed compatible on windows 8.1 (link: http://msdn.microsoft.com/en-us/library/windows/apps/dn344644.aspx).
I've upgraded it into the latest one. I've check on Device Manager, the driver is running well.
But my problem did not solved!
Please give me the solution!

Hi,
How about go to Device Manager, then uninstall Graphic driver and restart your computer, system will install its build in graphic drver. You can have a try.
In addition, access to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Brightness and set its value to 100 for test.
Roger Lu
TechNet Community Support

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.
That you can install version 1.64, you have to change the "Secure RollBack Prevention" Option in the BIOS: Restart the Computer. When you see the option "To interrupt normal startup, press Enter", press Enter. Press once again Enter. Press F1 to enter the BIOS Setup Utility. Choose "Security" -> then "UEFI Bios Update Option" -> then "Secure RollBack Prevention". Change this option to "Disabled". Then press F10 to save configuration changes and exit.
After restarting Windows you can install BIOS 1.64.
Another possibility is to wait for the next BIOS version ....

Not able to adjust screen brightness in Windows 8.1

hi,
I m using HP Pavillion N208TX with windows 8.1 64 bit version. i m not able to adjust screen brightness from f2 and f3 button and from the power setting also. when i press these buttons it shows the slider to adjust the brightness on top left corner of the screen but its does not adjust the brightness from low to high. i have already updated the Intel HD Graphic driver sent via link from HP Cust. care. kindly help me on this ASAP...
This question was solved.
View Solution.

Dear Customer,
Welcome to HP Support Forum and we are glad to assist you.
It looks like you are trying "Adjust Screen Brightness in Windows 8.1" for your Notebook.
We will surely assist you with this.
Please perform this step as shown below to resolve the issue:
1. Go to Search (point at upper right corner) and type Device Manager. Go there.
2. Expand Display Adapters
3. Right-click Intel(R) HD Graphics and Left-click Disable
4. Restart your computer
Note: Your screen resolution might be distorted now, you can just ignore
5. Go back to Device Manager, Display Adapters
6. Right-click Intel(R) HD Graphics and Left-click Enable
7. Restart again
Note: If at any point your screen goes blank and won't come back, just HOLD DOWN your power button until
the computer shuts down. Then press power again to start up
Hope this helps, for any further queries reply to the post and feel free to join us again
"I work for Hewlett-Packard"
* * * * * 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,
K N R K

Windows can not adjust the brightness on this display

I have a Toshiba Satellite LX835-D3300 ( Serial #ZC119804Q )
I want to brighten my display, but it tells me..... Windows can not adjust the brightness on this display.
In my HELP section on my computer it tells me to...
Tap or click PC and devices, then tap or click Display
Make sure the Adjust my screen brightness automatically slider is turned on
Get the best display on your monitor - Microsoft Windows Help
(If you don't want the screen brightness to change automatically, tap or click the Adjust my screen brightness automatically slider to turn it off.)
Tap or click Apply.
I do not have that.
I notice that if I go to the side of my screen and then click on Devices, click on projects... "Second Screen" is showning
I clicked on it and then I went and clicked on PC screen only and it is highlighted, but when I go back to it, it stills shows "Second Sreen"
Please help me. What am I doing wrong

All-in-One LX835-D3300
Downloads here.
Have you upgraded to Windows 8.1? If so, did you follow these instructions?
How to Update from Windows 8 to Windows 8.1
-Jerry

Cannot adjust screen brightness

I have a Lenovo G585 and after updating to Windows 8.1 can no longer adjust the screen brightness, it used to work fine. I also had a problem with sound after I installed 8.1 but managed to fix that.
Adjusting the brightness from Settings > Brightness does not work, nor does adjusting brightness from Battery Life > Adjust Screen Brightness or by using fn + up/down key.

hi jackbeazley,
Welcome to Lenovo Community Forums!
Open Device Manager and open Display adater.
Right click on AMD graphics and choose Uninstall
Be sure to place a check under delete driver software for this device.
Now Restart the computer and install this driver
AMD Video Driver
Check if the Screen Brightness will work now
Hope this helps
Cheers!
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

HP ProBook 4510s: Can't adjust screen brightness

Similar Messages

Maybe you are looking for