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Minimizing any UE4 window locks up my computer

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    Minimizing any UE4 window locks up my computer

    I found a bug that causes UE4 to lock up my computer when I use a specific material I made. I was trying to to make a post-process material that gives me the light values of the scene.

    In my first attempt, I divided the scene color by the base color. It gave me the light values for most of the scene except the parts where at least one of the base color's RGB values is 0. If one of the base color's RGB value is 0, it would give me a pitch black model with a colored outline depending on the 0 value. So to fix it, I tried clamping 0 to 0.000001, which fixed the previous problem, but gave the light value a slight tint of the 0 values.

    What I tried next is what locks up my computer. I made this material:

    Click image for larger version

Name:	DoomMat.jpg
Views:	1
Size:	173.4 KB
ID:	1136550

    What I wanted to do was if the the RGB values are higher than 0, it would do the scene color divided by base color thing I did before, but if it is 0, then do something else. I was gonna try different things for the 0 result, but I wasn't able to experiment due to the lock ups.
    Building the material and using it in the scene doesn't lock up my computer, it'll show the results normally on the viewport. But minimizing any UE4 window causes my computer to lock up, even if I disable, change or delete the material afterwards. I can have that chart somewhere in the material, and as long as the results aren't connected to the output or you never load the results from it, it wont break.

    This is discouraging me from using UE4 cuz, I'm afraid of how else I can break UE4, especially when I needed to start the project all over because building the lighting crashed UE4 and none of the fixes I found did anything.

    EDIT: Nevermind, UE4 seems to crash regardless of what project Im using and the material file became corrupted and does not show up in UE4 but its still in the folder.

    Here's my specs
    System Manufacturer: MSI
    System Model: MS-7751
    BIOS: BIOS Date: 10/24/12 17:02:19 Ver: 04.06.05
    Processor: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (8 CPUs), ~3.4GHz
    Memory: 16384MB RAM
    Available OS Memory: 16334MB RAM
    Page File: 4497MB used, 28170MB available
    Windows Dir: C:\Windows
    DirectX Version: DirectX 11
    DX Setup Parameters: Not found
    User DPI Setting: Using System DPI
    System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
    DxDiag Version: 6.01.7601.17514 32bit Unicode

    Card name: NVIDIA GeForce GTX 670
    Manufacturer: NVIDIA
    Chip type: GeForce GTX 670
    DAC type: Integrated RAMDAC
    Device Key: Enum\PCI\VEN_10DE&DEV_1189&SUBSYS_26703842&REV_A1
    Display Memory: 4038 MB
    Dedicated Memory: 1990 MB
    Shared Memory: 2048 MB
    Last edited by Admiral Skye; 07-13-2014, 09:13 PM.

    Hi Admiral Skye,

    I'm sorry you're having this issue. Can you post this on the AnswerHub in the "Bugs" section with all the details here? Thank you for being very thorough and detailed as well!

    When you do post this on the AnswerHub can you also include your crash report in an attached text file?

    Attachments: If your bug is easily reproduced with a specific content asset, then we welcome you to upload a simple test FBX or .uasset which we can test with.

    If you are experiencing a crash, then please provide us with the .LOG and .DMP files from your [project]\Saved\Logs folder. Additionally, you can please send us the CrashReportClient.log file located in *C:\Program Files\Unreal Engine\4.0\Engine\Programs\CrashReportClient\Saved\Logs*.

    On a Mac, the logs are located in: /Users/UserName/Library/Logs/Unreal Engine/(project name)Editor/ The Library Folder is hidden by default. The easiest way to get to it is by having finder the active application and while holding Option Click Go in the Mac Menu Bar. This will expose Library.

    Thank you!

    Tim Hobson | Learning Resources | Epic Games
    UE4 Documentation