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4.19 & 4.20 Editor & Packaged Games Have Hangs/Hiccups Constantly

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  • replied
    I've got a similar experience in a packaged build. It eventually started freezing progressively longer exactly every 3 seconds, nothing in game could fix it until restart.

    Profiler showed it taking an incredibly long time in ComputeLightGrid, so I added more profile zones there to track it down and since then it never happened again...

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  • replied
    Just chiming in here with a similar experience. I'm also getting a stutter/hiccup on 4.19 every 30s or so for a quick second, then it recovers. Usually only after the editor has been open for about 30min. Nothing odd in task manager. The stutters are either too quick for them to show up on usage stats, or Its not affecting my PC at all.

    I'm at work and don't have my PC driver specs handy, but its any map, any circumstances. Happens on both launcher build and source built version. I originally thought it was because I had both builds installed and didn't really think anything of it until I saw this thread. When it starts to bug me, I have just been saving and re-opening the engine.

    No effect on any other software, just a quick hiccup in the engine itself. I can check driver version later tonight. (also Nvidia though)

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  • replied
    Now that Motus Digital mentioned, it might be a driver issue since I have recently updated mine for 391.35 (NVidia) and I have a GTX 1080 in this machine. If I can reproduce the same issue again in a consistent way, I will try rolling back the driver version and see if it persists.

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  • replied
    Hmmm, yeah, it could very well be a driver issue then, but I don't know. One last thing to check: Open up the task manager, open up the performance tab, click the open resource monitor button. Open up the disk page, sort by "Total B/sec" and see if anything is using the hard drive like a virus scanner or other programs.

    Also, what kind of temperatures were you getting up to on your CPU and GPU? It's possible that you need to clean fans or check thermal pastes. You say it does it every second or so, and if it's not something directly wrong with the project(bad loops, etc) or with the hard drive thrashing, that screams thermal throttling to me.

    I just know that I've actually found 4.19 to have a massive increase in performance on this laptop and find it odd that you're having problems with it.

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  • replied
    I've gone through everything again and just can't find anything "wrong" with the Project itself causing the hanging. I really think it is rendering/graphics/viewport at the root of the problem. Hiding the viewport with another tab/window makes all the stutter go away from all other open windows. The viewport rendering is causing the stutter, everything is pointing to that, I've had Maya and Motionbuilder run awful with a new rev. that hated current video drivers similarly.

    As I mentioned - 980GTX with last three current drivers has identical problem/symptom. I know Epic played some games with up-sampling and AA for 4.19, I'm wondering if they changed some default Project rendering setting or such viewport code that is causing a problem on my specific card. I can't be the only one.

    If Epic (or anyone) can please suggest or think of what was tweaked and/or new default/feature/render 4.19 settings that could be affecting my viewport so adversely, I'd really appreciate the input.

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  • replied
    Originally posted by IronicParadox View Post
    When it's giving you this problem, what does your Task Manager==>Performance page look like(cpu/gpu/mem/hdd)? What do your temperatures look like(could be thermal throttling? Are you running out of ram? If you are, then it could be stutter coming from HDD thrashing the page file. Are you simulating the viewport, if so, could it possibly be some bad blueprint of yours that has a glitchy loop in it?

    This would be one of those test questions where the answer would be D) Not enough information.
    A fair query.

    Plenty of RAM overhead - 10gb remaining out of 24, CPU is chilling at about 29%. About the same stats as when running it in 4.16-7-8 where it has always been(and still is) smooth as silk. Seems to not be related to machine performance at all. (Except it acts like a "4.19 hates the graphics drivers" issue as originally stated)
    Glitchy BP? Who knows what evil lurks, but everything has been performing squeaky clean to date and they all look and function clean, so so why simply opening in 4.19 does the editor stutter worse the longer it's open? It happens ALL the time, not just during simulation while BP's are running, so that tells me it's not a bad BP.

    I can just open the Project, let it sit there and the stuttering goes from barely noticeable to drastic freezes. Manipulating the viewport, scrolling the log, everything. 4.19.0 introduced something funky, but what is it? It seems to hang every second, like clockwork. A clue there?

    Leave a comment:


  • replied
    When it's giving you this problem, what does your Task Manager==>Performance page look like(cpu/gpu/mem/hdd)? What do your temperatures look like(could be thermal throttling? Are you running out of ram? If you are, then it could be stutter coming from HDD thrashing the page file. Are you simulating the viewport, if so, could it possibly be some bad blueprint of yours that has a glitchy loop in it?

    This would be one of those test questions where the answer would be D) Not enough information.

    Leave a comment:


  • replied
    Originally posted by NilsonLima View Post

    I got once an ocasion where I have changed a material (ocean one) and the whole screen was like you described. The only solution was to close the editor and open again. After that I didn't see it happen again, but that left me really worried. I might get in touch at that same map and material again and see if it is consistently reproduceable or not. Seems like not worst than yours, but definitely turns the editor unuseable as it gets worst after some time.
    Thanks Nilson, interesting. It definitely happens every time I open the editor, starts almost not noticeable and gradually becomes much worse. I don't see any relation to a fancy shader either.

    Very strange, please any one else comment on this issue and possible cause and fix.

    Leave a comment:


  • replied
    Originally posted by Motus Digital View Post
    I searched for a similar thread and found none, sorry if this has been covered.

    I have a good size map with a lot of BP that has been working perfectly in 4.17 and 4.18 a long time. No errors, no warnings, squeaky clean. When I open it in 4.19.0, same thing no errors or warnings, fully functional, packages to an EXE that performs perfectly like it did with 4.18. In 4.18 I'm getting a solid 70-80fps in the editor viewport.

    However in 4.19 the entire editor hangs/freezes momentarily about once every second. The viewport, interface graphics, the log window - everything, like it's a graphics driver issue(just a theory). It is subtle at first, but the longer the editor stays open the worse it gets and the "pauses" get longer and longer. The FPS still shows about 70 but of course freezes with the screen and recalculates every after every pause again. It happens during preview play as well just as bad, and makes player capsules lag during the pause and create false collisions, etc.

    Basically the editor is unusable. It does not stutter with say a single UE4_Mannequin in a blank environment, but that is running at a pegged 120fps because of virtually no geo/textures so it points to a graphics issue again. I have a fast 4ghz+ PC and 980GTX running the latest drivers, and the last three drivers have had the same stuttering in 4.19.0. My hardware has never been an issue.

    Once again, runs smoothly/flawlessly in 4.17 and 4.18 and opens and "functions" flawlessly in 4.19.0 - except the stuttering screen freezes.

    Is anyone else seeing this crippling stuttering?
    Please verify or advise, what's going on? Is this a 4.19 bug or are Nvidia drivers **** for 4.19 right now?
    I got once an ocasion where I have changed a material (ocean one) and the whole screen was like you described. The only solution was to close the editor and open again. After that I didn't see it happen again, but that left me really worried. I might get in touch at that same map and material again and see if it is consistently reproduceable or not. Seems like not worst than yours, but definitely turns the editor unuseable as it gets worst after some time.

    Leave a comment:


  • 4.19 & 4.20 Editor & Packaged Games Have Hangs/Hiccups Constantly

    I searched for a similar thread and found none, sorry if this has been covered.

    I have a good size map with a lot of BP that has been working perfectly in 4.17 and 4.18 a long time. No errors, no warnings, squeaky clean. When I open it in 4.19.0, same thing no errors or warnings, fully functional, packages to an EXE that performs perfectly like it did with 4.18. In 4.18 I'm getting a solid 70-80fps in the editor viewport.

    However in 4.19 the entire editor hangs/freezes momentarily about once every second. The viewport, interface graphics, the log window - everything, like it's a graphics driver issue(just a theory). It is subtle at first, but the longer the editor stays open the worse it gets and the "pauses" get longer and longer. The FPS still shows about 70 but of course freezes with the screen and recalculates every after every pause again. It happens during preview play as well just as bad, and makes player capsules lag during the pause and create false collisions, etc.

    Basically the editor is unusable. It does not stutter with say a single UE4_Mannequin in a blank environment, but that is running at a pegged 120fps because of virtually no geo/textures so it points to a graphics issue again. I have a fast 4ghz+ PC and 980GTX running the latest drivers, and the last three drivers have had the same stuttering in 4.19.0. My hardware has never been an issue.

    Once again, runs smoothly/flawlessly in 4.17 and 4.18 and opens and "functions" flawlessly in 4.19.0 - except the stuttering screen freezes.

    Is anyone else seeing this crippling stuttering?
    Please verify or advise, what's going on? Is this a 4.19 bug or are Nvidia drivers **** for 4.19 right now?
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