Solved – LG Gram Fails to Wake From Sleep | Windows 11

(Modern Standby + Windows Hello Black Screen Bug)

If you’re experiencing black screens or unresponsive wake-ups on your LG Gram running Windows 11 — especially after longer sleep periods — you’re not alone. Every time we tried to wake the computer up from sleep mode, the webcam light flashes but the screen remains black, the keyboard is unresponsive. The only way to resume was to hold the power button down and force a hard reboot – closing all my open applications and files. After months of troubleshooting, I finally identified a conflict between LG’s OnScreen Control utility and Modern Standby (S0 Low Power Idle) as the root cause. I did a couple of additional steps which we will outline in detail below but our LG Gram 17 is now entering sleeep mode and waking up without issue ‘ just like it always did. Here we outline what to do when your LG Gram fails to wake From sleep or hibenation in Windows 11.

🔎 The Symptoms of The Black Screen Bug and Wake from Sleep Error

• After waking the device (e.g., pressing spacebar), the webcam light flashes for Windows Hello, but the screen stays black.
• Caps Lock and Num Lock keys become unresponsive. Confirmed as unresponsive as pressing them does change the led indicator on Caps Lock key.
• Keyboard backlighting does not turn on.
• LED Power light next to the power button continues to flash slowly.
• External monitors would also fail to display anything but a black screen.
• Eventually the webcam light times out and you have nothing but a black screen.
• Eventually, the system becomes completely frozen, requiring a hard reboot.
• On some attempts, the system reboots immediately after trying to wake from sleep.

❔Root Cause

• The issue appears to have started around the time Windows 11 22H2 was being updated to Windows 11 23H2 (around April 2024) and a buggy or outdated version of LG OnScreen Control.
• LG’s own utility updater doesn’t update OnScreen Control properly, and conflicts with Modern Standby (S0) appear to trigger the sleep/wake crash.
• I do note that LG’s update utility did provide a new download of OnScreen Control possibly around the same time. But with numerous attempts at installing it, re-downloading it etc., I always ended up with an error “Unable to determine your current version” and the installer could not proceed.
• In addition, there were a couple of other steps that we did but effectively the issue was a Modern Standy Resume Stack being broken.

❌ What does not work

We tried several different things over the course of a few months and none of these work.

• Running Windows Update
• Refreshing the graphics driver and trying to use Intel Driver Management application
• Running System File Checker (SFC) Scan (sfc /scannow)
• Changing Sleep Settings to Hibernate by editing Power Options what power button does
• Testing with Modern Standby (S0) (powercfg /a showed only S0 and Hibernate available at first)
  • Note, initially we thought some tweaks around this solved it. But after longer sleep periods, the issue persisted.
• Disabling Fast StartUp
• Editing Power Plan options
• Reverting to ACPI S3 (after unlocking BIOS) and disabling Modern Standy (S0). Enabling Fast Startup caused immediate system crashes when trying to wake.
• Disabling Windows Hello – the same error occured when using a standard login (just no webcam light)
• Trawling through Windows Event Viewer looking for Errors and Critical Errors – we found nothing relevant here after an hour or so.

✅ The Solution

Step 1: Update LG OnScreen Control Application

At the time of writing this article, our LG Gram 16Z90Q is running Microsoft Windows 11 Home Version 10.0.26100 Build 26100 ( Shown as Windows 11 24H2 in the Windows Update History)

Download LG OnScreen Control Version 9.43 – this version is compatible for Windows 11 24H2

Either log in to your LG Gram as an administrator and run LG Update & Recovery and it should give you a prompt to download the new version. If not, you can go to https://www.lg.com/us/support/help-library/lg-monitor-how-to-use-on-screen-control–20153186454352 and enter your model to get the latest version. If you are outside of the US and having trouble with your extended model number, you can try visiting your local LG website and download it from there.

Important Installation Tips

• If you try to just run the installer after downloading, like we did you may repeatedly get an installation error of “Unable to determine your current version”. To resolve that, follow the steps below carefully.
• Log out of any standard user accounts and log into an administrator account.
• If your OnScreen Control is running, exit the application.
• Open Task Manager (Win Key, type start)
• Navigate to the processes tab and right click and select ‘close’End Task’ on :
  • OnScreen Control Control Service (32 bit) (yes our PC is 64 bit but the application is not)
  • All entries of OSCApplicationManager (32 bit)
• Go to your downloaded OnScreenControl.
• Important if it is a zip file which it should be, the installer will always fail if your try to run it from the zip file.
• Click into the zip file, right click on the file name and select Extract All. Exit back out of the zip and then navigate into the extracted folder OnScreenControl-9.43 and double click on OSC_Gaming_9.43.exe
• As you begin the installation – you want to find the installation option to ‘Uninstall Previous Version’. Proceed with the uninstall and when it finishes – reboot your computer.
• Once again, log into your administrator account and run the installer again. This time it should successfully run and install version 9.43 to your PC.

Step 2: Force the LG Gram and Windows to refresh the Power Plan

Disable Modern Standy (S0) in LG’s hidden advanced BIOS settings

When you enter the BIOS (reboot and press F2 during initial power up), you’ll be disappointed at what you find. It is the most basic BIOS with virtually nothing shown as information or options other than basic boot sequences.

Enter LG’s Advanced Bios

Press and hold Ctrl + Shift + Alt, then whilst holding those 3 keys, press the F7 button – and you are in advanced BIOS settings!

Using the right arrow key, navigate the BIOS to Advanced Settings.

We recommend before you do anything, take a photo of this screen. Later on we will want to set it back exactly the way it was and it is easy to forget small details.

Arrow down to ‘Low Power S0 Idle Capability’, once highlighted press enter and change the prompt to ‘Disabled’.

When you do that, your BIOS screen should look like the image below. If it does, then Modern Standby will be disabled from the Windows Power Management system on your LG Gram. You will notice a few options get removed from the display.

Press the ‘Esc’ to escape out of that screen and you can press it again or arrow over to Exit menu, and be sure to select ‘Exit Saving Changes’ and ‘Yes’ to confirm.

Your system will reboot and you should log back in as an Administrator.

Optional

Whilst we don’t believe this had any effect on the overall solution, we will include this just in case it did something underneath the Windows 11 hood that we couldn’t see. We did it and want to be thorough in our advice on how to solve this black screen error on wake up. Doing this will almost certainly make your system crash when you try and wake it but we are trying to force Windows 11 to heal itself. So this may be relevant or irrelevant. You can let us know in the comments if you find out!

• Press Win key and type ‘control’ and select Control Panel and Power Options.
• Select ‘Choose what the power buttons do’
• You should see the ‘Turn on fast startup (recommended)’ box unticked.
• In the upper part of the dialog, select the ‘Change settings that are currently unavailable’.
• Check the box ‘Turn on fast startup (recommended)’ & click Save Changes.
• Press your power button to put your computer to sleep.
• Wait 30sec of so for it to sleep and Press any button to wake it up. Your system will most likely crash and reboot!
• Optional but we did this twice and it crashed twice.

Perform a clean reboot of your system, log in and execute a proper Windows shutdown or reboot to ensure Windows 11 has exited properly and not recovering from a crash.

Re-enable Modern Standy (S0) in LG’s hidden advanced BIOS settings

Repeating the steps we used above to access the LG Advanced Bios Menu – Advanced Settings Menu and arrow down to ‘Low Power S0 Idle Capability’. Press enter and this time select ‘Enable’.

You will get a big warning in red – don’t stress, just press enter to accept the ‘Continue’

Once accepted, the settings should revert back to exactly the way they were before we disabled it and if you took the photograph, you can double check it again now.

Press ‘Esc’ a couple of times and be sure to select ‘Exit Saving Changes’ and ‘Yes’ to confirm.

Reboot & Re-Enable Fast Startup (if not auto re-enabled)

Following the steps we described above in ‘Optional’, go back to edit the power plan and make sure ‘Turn on fast startup (recommended)’ is ticked.

If Fast Startup is ticked and greyed out that is fine.

If it is unchecked, In the upper part of the dialog, select the ‘Change settings that are currently unavailable’, Check the box ‘Turn on fast startup (recommended)’ & click Save Changes.

Last Step – Restore the Default Power Plan Options

This should help windows reset its resume from sleep stack for Modern Standyb (S0) after having previously been set to ACPI S3 Support. Refreshing this is required to help trigger Windows 11 internals to update & heal itself again.

• Press ‘Win’ key and type ‘control’ and select control panel.
• Select ‘Power Options’
• Select ‘Edit Plan Settings’
• Click on ‘Restore default settings for this plan’
• Once done, if you had any longer time settings for turning of the display and putting to sleep etc, you can re-enter them again now.
• Reboot your system

✅ Now when you put your LG Gram to sleep – it should always wake up nicely, just as ours has done for the last week since following these steps!

	This solution was developed and confirmed in Windows 11 24H2 & LG Gram 16Z90Q by windowssolved.com
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