Abrupt change of brightness of the screen

Similar Questions

• Windows 8 allow the change of brightness of the screen on Lenovo G585.

  I'm on WIndows 8, 64-bit, and I cannot adjust the brightness of the screen, regardless of the settings of power. I have an AMD Vision graphics card, but no matter what setting I try to change and what I'm trying to update (that I can't, because they are all fully updated,) drivers, I am stuck on the maximum brightness constantly. I hear a lot others have this problem on various laptops and even some desktop computers. Help, Microsoft!

  ~ DigiDuncan

  This old now so I guess that the problem has been corrected, but this just happened to me and I thought I'd share how I just fixed the issues. Go to system in Control Panel, on the right side of the screen, there should be a link to the Device Manager, after clicking this click on graphics cards, there will be another link (mine says) "Intel (r) Iris (TM) Graphics 1500" click on this and go to the pilot, go down to uninstall After uninstalling go through these steps again, but go down to update and then it should work fine.

• Satellite P855: cannot change the brightness of the screen under Linux

  Hello, guys... and girls :)...

  I bought my PC Toshiba laptop fourth - P855, there windows 7 pre-installed, but I'm a fan of Linux, so I installed Kubuntu 12.04 on it and have the dual boot menu at startup...

  And I have a very annoying problem - I can not change the brightness of the screen somehow, so keep it up... for the brightness function keys do not work, and the slider for brightness change anything...
  It works on windows, so I guess that's not the hardware problem...

  So, can you help me? ... I tried many things, tried different distributions also, but on none of them, I am able to change the brightness. And also - I tried the same distribution on the different laptops, and it works great, even from Live CD, no installation...

  I was able to change the brightness on previous phones I had... so why is this one so well done for Windows? ...

  > It works on windows, so I guess that's not the hardware problem.

  It's okay is not hardware problem, it looks like a bug in the Linux kernel or driver problem.

  Given that Linux is not officially supported on Toshiba laptops, I would recommend checking the support forum for the Linux distribution you use check also system Linux bugs for a possible solution on some linux support pages.

• Can not change the brightness of the screen - HP ENVY 17 laptop

  After the upgrade to Windows 8.1, I have the problems below:

  -I can not change the brightness of the screen on my laptop

  -When I clicked "Contact technical support" on HP support assistant program, he showed an error "HP support assistant has stopped working"... and closed the program. I downloaded a new at HP, but the same problem occurred.

  My laptop PC info

  Product name: HP ENVY 17 Notebook PC

  Product number: A9P84UA #ABA

  Please instruct me how to fix it. Thank you.

  I posted the step by step guide here: http://www.tomshardware.com/forum/id-2748304/amd-intel-enduro-laptop-brightness-fix-win.html but if you are familiar with registry just search FeatureTestControl and see if the value is using f840 or f940 and replace it with ffff then restart your computer. should work now. But if you are still having the same problem trying to follow the steps on this post. see you soon!

• Windows 8: brightness of the screen changes (Satellite L855-11 t)

  Hello

  I own a satellite L855-11 t and installed Windows 8 Pro x 64 (full version DreamSpark). Everything works well except for one thing: I can't change the brightness of the screen.

  I installed the new drivers and PVAT, system driver, etc. (even of csd.toshiba.com, because these are already for Windows 8). Toshiba function key does not work, do not know why. And Intel won't let me install the display driver: my system does not meet the requirements. I thought that there is a GPU integrated into Ivy Bridge?

  Well, when I press FN + F2/F3 brightness indicator appears and changes its value, but nothing happens not on my screen. I just stay the same (which seems to be applied after a reboot). I disabled same Adaptive brightness, but it did not help. Any other function key work correctly (out of the box by the way).

  I hope you can help me.

  At present, it is not easy help with Win8 malfunctions. Until doesn t support official Win8 Toshiba we write just on good or bad luck.
  In General, there are a lot of Toshiba tools and utilities that must work together. Yet he offered no tested versions.

  Display drivers for mobile units are offered and tested by the manufacturers of portable so up to what Toshiba doesn t it I think that you should use your Win8 and learn how it works. In my opinion, the key is to check all the new features. All the specific stuff from Toshiba can be installed in addition.
  Later, when Win8 support starts, you can install it again and just work well the OS, including specific functions of Toshiba.

• T400 cannot change the brightness of the screen

  Hi all

  I just bought a new T400 and my screen brightness can change. No matter on battery or AC power, there's always the brightest mode.

  When I press Fn + home / end, the indicator changes accordingly but not the screen itself.

  Someone at - it feel the same? Any advise?

  Hello

  My laptop is okie now. It's the hardware problem. I got the replacement of 1 to 1 for this.

• Is it possible to change my graphics or monitor to increase the brightness of the screen, Windows, but outside the display properties?

  Picture Dim
   
  Is it possible to change my chart or monitor to increase the brightness of the screen, Windows, but (outside), I realize I ask for much because my machine is a 10 inch netbook ca. 2008, and the bios has very few options available user. The computer runs on XP (SP3) with input would be welcome.
  I hope yours,.
  Paul R.

  Hi Paul R.

  ·         Did you do changes on the computer before the show?

  Follow these methods.

  Method 1: Run the fixit of the article.

  Troubleshoot Windows display the text on the monitor is not readable

  Method 2: Follow the steps in the article.

  Resources for troubleshooting problems in Windows XP

• cannot change the brightness of the screen

  Hello

  Two months ago, I bought a dv3t 2000 and recently I installed windows 7 and I realize that it is not possible to change the brightness on the screen, is always the same. I tried to change the power management, I have upgraded the BIOS, but so far, does not work.

  I'd appreciate if someone help me with this problem.

  Thanks in advance.

  Maurice

  I tried all the drivers of hp, but none of them solved the problem, but after searching the Web, I happen to find a solution to the problem brightness screen... now everything works the way that is supposed to.

  It was just to install a new version of the 'Mobile Intel (r) 4 Series Express Chipset Family"from Intel, the driver provided by HP seems to have a problem.

  Thanks anyway.

  Maurice

• Possibility to change the brightness of the screen is no longer available in the control panel

  original title: I cannot adjust the brightness of the screen more! Why this option disappeared suddenly from the control panel? It was fine last week.

  Every night, I turned off my screen. Suddenly last week, this option disappeared.

  Hello

  You did material recent or changes to software on your computer before this problem?

  Step 1: If the computer does not display the option to adjust the display brightness, check with the manufacturer of the computer for a BIOS updated to support this option.

  You can also try to update the drivers for hardware from the computer and check.

  BIOS WARNING
  Change (CMOS) BIOS/complementary metal oxide semiconductor settings can cause serious problems that may prevent your computer from starting properly. Microsoft cannot guarantee that problems resulting from the configuration of the BIOS/CMOS settings can be solved. Changes to settings are at your own risk.

  Reference:
  http://Windows.Microsoft.com/en-us/Windows-Vista/update-a-driver-for-hardware-that-isn ' t-work correctly
  http://Windows.Microsoft.com/en-us/Windows-Vista/update-drivers-recommended-links

  Step 2: You can also try the system restore feature and restore so far when you were able to see the brightness of the display option in Control Panel.

  Reference: http://windows.microsoft.com/en-US/windows-vista/What-is-System-Restore

  I hope this helps.

• After setting the brightness of the screen to the medium level, it change to the lower level after a few minutes.

  Original title: adjustment of the brightness of the display

  I have Lenovo laptop with Windows Home Premium. After setting the brightness of the screen to the medium level, it change to the lower level after a few minutes. Why can't I corrected the brightness of the display to the level I want?

  Hello

  I understand that you are facing problems with the brightness of the display. I understand the inconvenience.

  1. did you of recent changes to the computer before the show?

  2. What is the number of the model of the computer?

  Let us perform the following methods and check if it helps to solve the problem.

  Method 1: Try the Aero Troubleshooter

  Click Start, type Visual and then click on 'Find and Fix problems with transparency and other Visual effects.

  Follow this troubleshooter to see if that fixes the problem.

  Method 2: Uninstall and reinstall video graphics driver

  Update drivers:

  http://Windows.Microsoft.com/en-us/Windows7/update-drivers-recommended-links

  Method 3: Adjust the brightness and contrast of your monitor

  http://Windows.Microsoft.com/en-us/Windows7/adjust-your-monitors-brightness-and-contrast

  Reference:--

  Calibrate your screen

  http://Windows.Microsoft.com/en-us/Windows7/calibrate-your-display

  It will be useful. For any other corresponding Windows help, do not hesitate to contact us and we will be happy to help you.

  Kind regards!

• Why the brightness of the screen on my Tablet keep changing suddenly?

  Why the brightness of the screen on my Tablet keep changing suddenly?

  Some tablets have a light sensor Adaptive that detects the actual brightness in the room and adjusts the brightness of the screen accordingly.  If the light hitting the sensor is constantly changing, or if you accidentally cover this sensor with your hand or thumb, it can fool the sensor into thinking that you are in a room dark and it will lower the brightness on the screen.

  In Windows 8, the Adaptive brightness setting is enabled by default.  You may be able to prevent unwanted changes in the brightness of the screen by deactivating the Adaptive brightness setting.

  1. on the home screen, type Control Panel , and select the control panel.

  2. set the display: drop-down category menu

  3. Select the material and audio.

  4. Select Power Options.

  5. Select the link Edit plan settings on your current power plan

  6. Select change advanced power settings

  7. develop the display

  8 expand enable adaptive brightness

  9. set the setting to Off , then select OK.

• Pavilion dv6-1334us: how to change the brightness of the screen?

  Hi all:

  I used the HP Pavilion dv6-1334us and wXP for 7 years.

  Recently, I think that the brightness of the screen is a little too low/dark.

  I wish to address to the top/more brighter, but can not find the key/path!

  Could you please tell me?        -Zhao

  @zpxykm

  Try to use the Fn F8.

  REO

• How can I change the brightness of the screen without using the fn key?

  I want to know how to increase the brightness of the screen using the parameters of the computer, not a keyboard.

  Thank you

  Hello

  1. What is the brand and model of your computer?

  2. is it a laptop or desktop?

  I suggest to read the following steps and check if it helps.

  a. Click Start, click Control Panel.

  b. Select "Appearance and themes" when prompted in the Panel 'category view. " If you are in "Classic Mode", choose the "View" icon

  c. Select the 'Settings' tab in the display properties window.

  d. Select the button "Advanced" at the bottom of the window. This will take you to the properties of your screen.

  e. click on the tab "colors".

  f. Select the brightness scale and push or pull until you are satisfied with the brightness of your screen.

  g. Press 'OK' to adjust the brightness of your.

  More information consult:

  Adjust the brightness and contrast of your monitor: http://windows.microsoft.com/en-US/windows-vista/Adjust-your-monitors-brightness-and-contrast
  Note: There is for Windows XP as well.

• HP 15 laptop: how to adjust the brightness of the screen in windows 10

  Since I've upgraded to windows 10, I have not be able to adjust the brightness of my laptop computer screen because I m not getting is not the option to set the brightness of the screen, or the screen brightness keys Up and Down to work. Also I updated the graphics card and the condotion is always the same... no change!

  Please can someone give me the solution to get rid of this problem

  I fixed that on my envy 15 j151sa-

  Settings > display > Advanced display settings > view the adapter properties

  Then properties > driver tab > Update Driver button.

  Voila!

• Impossible to add an external monitor or adjust the brightness of the screen: Pavilion dv7-4031TX (Windows 7)

  Hello

  I recently replaced both hard drives of HDD2K12, which meant I had to re-enstall Windows 7. Since that time, I have no options more in using an external monitor or even the brightness of the screen. The computer does not recognize the monitor when I Plug and all my drivers are up to date.

  Can you make suggestions that could help to solve these two problems?

  Kind regards

  Peter

  Thanks to find the links but I could not find the drivers I need for a Pavilion dv7-4031TX.

  However I finally managed to fix the problem. Let me summarize what has been my problem.

  (1) I could not adjust the brightness of the screen by using the function keys f2 and f3.

  (2) I couldn't find the brightness slider if it was generally... i.e. (control Panel\Hardware and Options of Sound\Power)

  (3) my laptop would not recognize an external monitor.

  How I solved the problem:

  1 > pass.

  http://h10025.www1.HP.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-95107-1 & CC = in the & DLC = in & LC = on & os = 4063 & Product = 4253423 & sw_lang =

  and go to the graphics driver and download the graphics driver and follow the directions. At the end of the installation you will be asked to restart the computer.

  0nce you have restarted your computer, you should be able to adjust the brightness of the screen using the fn keys or the brightness slider in the window 'power Option '.

  2 > Activting 2nd monitor

  Click on Device Manager... At start-> right click on 'Computer' and click 'properties '. Click on "Device Manager". Now click on "monitors".

  Now connect the exernal monitor to your laptop while watching where the monitor icon appears under "monitors". It should appear as 'Generic PNP monitor'.

  Now, right-click on it and select "update driver software... "then search automatically for updated drivers. Install the new drivers. You should see the generic 'PNP monitor' name change to another name.

  3 > restart your computer. You should find that after doing all this, you should be back to normal.

  Concerning

  Peter