https://bugs.kde.org/show_bug.cgi?id=411539
--- Comment #11 from TrXteRWHO <trixterphill...@gmail.com> --- (In reply to Dmitry Kazakov from comment #10) > Hi, TrXteRWHO! > > Could you try to go to Preferences->Display and try to select "Software > Renderer"? > > It looks like there is some bug in the GPU drivers that prevents Krita from > functioning normally. So, bascially, you have two options: > > 1) Activate "Software Renderer" as a renderering engine > 2) Disable Canvas Graphics Acceleration completely. > > Both solutions will transfer calculations from GPU to CPU, which might make > Krita a bit slower, but it least it will workaround faulty GPU drivers. Apologies for taking so long to get back to this thread, Boudewijn and Dmitry. I've had other matters that required my attention. Though, I am happy to report that the issue is resolved. Long story short, completely disabling the Canvas Graphics Acceleration resolved this issue. It also resolved the instability Krita 64-bit began to suffer from that forced me to switch to the 32-bit version. Short story long, over the weekend I tried a few times to uninstall Krita with RevoUnistaller and IOBit's uninstaller to see if that might resolve the issue. (This also involved changing and deleting some copies of the kritarc file. I still encountered the same problem with the 64-bit. Finally, I decided to uninstalled Krita 64-bit with one of the two abovementioned uninstallers. Then, I removed all the files Krita stores in the %LocalAppData% folder and stored those in a folder on my desktop. I cannot remember if I moved those file before or after reinstalling Krita 64-bit. But I know they were moved prior to starting Krita 64-bit for the first time. Unbeknownst to me, Krita automatically turned off the Canvas Graphics Acceleration. Since this latest installation, Krita is working as expected. I can close documents without it crashing, and they close right away without any lag or unresponsiveness. I went ahead and created two sample .kra files to see if that might cause a crash, just to be safe. Other than a slight lag after clicking the Create button when making these A4 300ppi files, I experienced no issues. Also, if I recall correctly, after the final install I did a substantial amount of work on a file with no issues. Overall, the software seems to work as designed given what features I have used to this point. In fact, it is working much better than prior to this display change. I even went ahead and installed the 4.2.6 to see if it would work properly. Work properly it did. It seems that having previously installed different iterations of both the 32-bit and 64-bit version of Krita lead the 4.2.5 version to incorrectly turn on the Canvas Acceleration. Though, it seems like this might be a bit of an ID10T error given my sloppy computer housekeeping. I'm going to attach all the files from my %LocalAppData% that I removed. I will also include the current Krita files from that said folder. I appreciate everyone's time helping me with this issue and I hope this report can help with the development of future iterations. -- You are receiving this mail because: You are watching all bug changes.