Predator PHN16-72 need help regarding gpu issue. my taskbar brightness slider gets greyed out

Aman_1812
Aman_1812 Member Posts: 4 New User
edited June 11 in Predator Laptops

Im using the Predator PHN16-72 model , bought it 2 months ago . Since yesterday whenever I switch to the discrete GPU through the NVIDIA control panel , my taskbar brightness slider gets greyed out and the only way to adjust brightness is through the function keys on my keyboard . The slider works fine when Im using the integrated gpu but gets locked whenever im on dGPU . Ive been experiencing this issue since yesterday and would like help to resolve this issue .

Screenshot 2025-06-11 221109.png

[Edited the thread to add issue detail]

Answers

  • Ugly
    Ugly Member Posts: 26 Enthusiast WiFi Icon
    edited June 11

    Probably a bug. You should use Predator sense to apply the nvidia gpu only as it has to force a restart as it changes the option in the BIOS

  • Axxo
    Axxo Member, Ally Posts: 1,926

    A greyed-out brightness slider in Windows, including on a PHN16-72 laptop, is often a sign of a display driver issue or a problem with the built-in screen. It could also be due to Function Lock or a device setting.
    Here's how to troubleshoot:-

    1. Check Device Manager:
    Open Device Manager.
    Expand "Display adapters."
    Ensure your display adapter is enabled. If it's disabled, right-click and choose "Enable."
    2. Update Display Drivers:
    Go to your computer's manufacturer's website and download the latest display driver for your device.
    Install the downloaded driver.
    Restart your PC after installation.
    3. Check Function Lock (Fn+Esc):
    On many laptops, Function Lock (Fn+Esc) can prevent the brightness slider from working.
    Try pressing Fn+Esc to disable Function Lock.
    4. Verify Monitor Settings (External Monitor):
    If you're using an external monitor, ensure the monitor settings are not set to use "PNP Monitor" and try changing to "Generic PNP."
    5. System File Checker (SFC):
    Run System File Checker (SFC) to scan for and repair corrupted system files.
    Open Command Prompt as administrator.
    Type sfc /scannow and press Enter.
    6. Intel Chipset Drivers:
    Try installing or updating your Intel chipset drivers if you have an Intel graphics card.
    -----------------------------------------

    If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful.

  • User_PH16_71
    User_PH16_71 Member Posts: 54 Enthusiast WiFi Icon

    Yeah, I get this too, but only the few times I've tried using the onboard graphics. Switching back to the graphic card and the problem disappeares for me.

  • User_PH16_71
    User_PH16_71 Member Posts: 54 Enthusiast WiFi Icon
    edited June 12

    @Axxo Thanks, I've tried all but suggestion point 5. Updating drivers etc didn't do the trick for me. Never thought of SFC so I'll give it a go!

  • Aman_1812
    Aman_1812 Member Posts: 4 New User
    edited June 12

    ive tried all of them except point 6 and unfortunately no help . tried playing RDR2 today on my pc but whenever i open the game , i cant control the brightness anymore even via the function keys . well i installed RDR2 on Monday and right after launching the game i adjusted my brightness via the Fn keys while i was still on the loading screen . the game ran fine . but when i opened it the 2nd time on tuesday i started getting this problem

    WhatsApp Image 2025-06-12 at 12.58.01_1575ac82.jpg

    i found this in my update history . 10th june is the day since which ive been facing this problem and idk why the update failed but can somebody tell me what to do in this case ? like how to manually install the failed driver . i tried installing from Acer site but it didnt help .

  • Aman_1812
    Aman_1812 Member Posts: 4 New User

    by onboard graphics do you mean the RTX discrete GPU?

  • Ugly
    Ugly Member Posts: 26 Enthusiast WiFi Icon

    As I said in my previous post ...why are you using the nvidia control panel to select the nvidia gpu? You either leave it on automatic so the nvidia gpu is activated when you play a game and then defaults back to the Intel igpu when on desktop. Or you use predator sense to completely deactivate the intel igpu and always have the nvidia gpu operating 100%. That does force a reboot as the bios is changed. It also means your cpu runs slightly cooler when gaming . I bet the brightness works OK then.

  • Aman_1812
    Aman_1812 Member Posts: 4 New User

    well I usually did leave it on auto select on both the control panel and predator sense , but for RDR2 i noticed that i got better framerate when i manually switched to the nvidia gpu through the control panel before launching the game . also using the control panel i dont need to restart like the predatorsense switch so it does save time and the need to reboot the system . it worked absolutely fine the previous week .

    and when switching via the predatorsense switch yes the slider does work fine like its supposed to