Blender extremely laggy #49390

New Issue

Dave · 2016-09-18T18:49:17+02:00

Dave commented

2016-09-18 18:49:17 +02:00

System Information
Windows 10, nVidia GTX 980, driver version 372.70, all windows updates current, etc.

Blender Version
Broken: 2.77.a abf6f08 (64bit)
Worked: 2.73 (Haven't used Blender in a while so I can't comment on 2.74/5/6)

Blender is extremely laggy on my primary monitor (technically Windows considers this monitor 2, but there's no way to adjust that) It's an 27" 2560x1440 ASUS gaming monitor connected via display port. The program updates maybe once per second, not just the view port, every element of the interface lags, including the minimize window button etc in the program bar, or just dragging the Blender window around on the desktop. I normally run this monitor at 120Hz, but I've tested Blender at 144Hz and 60Hz and it makes no difference.

The most curious part about this is moving blender to a second monitor make it work absolutely fine. Even placing the Blender window 51% on the second monitor makes it work fine, but as soon as it's primarily on the main monitor, it resumes the laggy behavior.
Obviously I'd prefer to use it on my 2560x1440 display than one of my smaller ones, also ergonomically the smaller one is in an awkward spot for mouse and keyboard work. (It's a Cintiq)

Exact steps for others to reproduce the error
Just installed and tried to use it. Immediately after installing it, I loaded it up and it worked fine, the next day it's laggy. I uninstalled it and reinstalled it, same thing happened. Worked fine, then the next day it's laggy again.

I've installed 2.76 and 2.73 (or rather just ran them from the extracted zip files) and they are exhibiting this behavior as well. This is obviously some new quirk of my computer, I assume some video driver or windows update is causing this, since a year ago, 2.73 ran just fine, but Blender is the only program exhibiting this behavior, so it's obviously a combination of factors.

**System Information** Windows 10, nVidia GTX 980, driver version 372.70, all windows updates current, etc. **Blender Version** Broken: 2.77.a abf6f08 (64bit) Worked: 2.73 (Haven't used Blender in a while so I can't comment on 2.74/5/6) Blender is extremely laggy on my primary monitor (technically Windows considers this monitor 2, but there's no way to adjust that) It's an 27" 2560x1440 ASUS gaming monitor connected via display port. The program updates maybe once per second, not just the view port, every element of the interface lags, including the minimize window button etc in the program bar, or just dragging the Blender window around on the desktop. I normally run this monitor at 120Hz, but I've tested Blender at 144Hz and 60Hz and it makes no difference. The most curious part about this is moving blender to a second monitor make it work absolutely fine. Even placing the Blender window 51% on the second monitor makes it work fine, but as soon as it's primarily on the main monitor, it resumes the laggy behavior. Obviously I'd prefer to use it on my 2560x1440 display than one of my smaller ones, also ergonomically the smaller one is in an awkward spot for mouse and keyboard work. (It's a Cintiq) **Exact steps for others to reproduce the error** Just installed and tried to use it. Immediately after installing it, I loaded it up and it worked fine, the next day it's laggy. I uninstalled it and reinstalled it, same thing happened. Worked fine, then the next day it's laggy again. I've installed 2.76 and 2.73 (or rather just ran them from the extracted zip files) and they are exhibiting this behavior as well. This is obviously some new quirk of my computer, I assume some video driver or windows update is causing this, since a year ago, 2.73 ran just fine, but Blender is the only program exhibiting this behavior, so it's obviously a combination of factors.

Dave commented

2016-09-18 18:49:17 +02:00

Changed status to: 'Open'

Dave commented

2016-09-18 18:49:17 +02:00

Added subscriber: @DaveB-4

Sybren A. Stüvel commented

2016-09-18 20:21:23 +02:00

Added subscriber: @dr.sybren

Sybren A. Stüvel commented

2016-09-18 20:21:23 +02:00

Interesting, we have almost the same setup (Win10, ASUS 24" 1920x1080 144 Hz monitor, connected via displayport to Geforce GTX 970), but I don't experience these issues.

Please try with a recent build from our build-bot, to be sure that this isn't a bug that we've already fixed.

Interesting, we have almost the same setup (Win10, ASUS 24" 1920x1080 144 Hz monitor, connected via displayport to Geforce GTX 970), but I don't experience these issues. Please try with a recent build from [our build-bot](https://builder.blender.org/download/), to be sure that this isn't a bug that we've already fixed.

Dave commented

2016-09-19 19:13:20 +02:00

I tried this with 2.78-c2d7d47 and it exhibited the same behavior.

Oren Titane commented

2016-09-19 19:48:29 +02:00

Added subscriber: @Genome36

Oren Titane commented

2016-09-19 19:48:29 +02:00

Try destroying all cached data that blender creates (on windows its located in the %appdata%) and reinstall afterwards.

If it does not work, then the issue might be related to the OS interactions with blender.

Try destroying all cached data that blender creates (on windows its located in the %appdata%) and reinstall afterwards. If it does not work, then the issue might be related to the OS interactions with blender.

Dave commented

2016-09-21 18:03:08 +02:00

There's no cache in there I can see (at least at \AppData\Roaming\Blender Foundation\Blender\2.77) Just a bookmarks.txt and userprefs.blend

There's no cache in there I can see (at least at \AppData\Roaming\Blender Foundation\Blender\2.77\) Just a bookmarks.txt and userprefs.blend

Bastien Montagne commented

2016-09-30 12:49:52 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2016-09-30 12:49:52 +02:00

This is likely a driver issue, you may try with newer/older versions, also please check those points:

Try to disable any running antivirus.
Try to start Blender in factory settings (--factory-startup commandline option) (this will ensure whether this is a userpref or addon issue or not).
Try to tweak OGL settings in UserPreferences, System tab.
Try to tweak your GPU driver settings (e.g. try different values between 'performance' and 'quality' if you have such slider, etc.).
Attach as text file here the report generated by Help -> System Info (do not paste it directly in comment).
Try to place this dll next to your blender.exe (software OGL, will be slow, but will show whether this is a driver issue or not) - this might be just laggy everywhere though :/.

This is likely a driver issue, you may try with newer/older versions, also please check those points: * Try to disable any running antivirus. * Try to start Blender in factory settings (`--factory-startup` commandline option) (this will ensure whether this is a userpref or addon issue or not). * Try to tweak OGL settings in UserPreferences, System tab. * Try to tweak your GPU driver settings (e.g. try different values between 'performance' and 'quality' if you have such slider, etc.). * **Attach as text file** here the report generated by Help -> System Info (**do not** paste it directly in comment). * Try to place [this dll](http://download.blender.org/ftp/sergey/softwaregl/win64/opengl32.dll) next to your blender.exe (software OGL, will be slow, but will show whether this is a driver issue or not) - this might be just laggy everywhere though :/.

Bastien Montagne commented

2016-10-07 10:51:46 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2016-10-07 10:51:46 +02:00

Bastien Montagne self-assigned this 2016-10-07 10:51:46 +02:00

Bastien Montagne commented

2016-10-07 10:51:46 +02:00

More than a week without reply. Due to the policy of the tracker archiving for until required info/data are provided.

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Blender extremely laggy #49390