After exporting with jpg. the images get random horizontal white lines. My system is Windows on Dell Inspriron 15 3000. My Affinity program is 2 years old.

[Caryl]

Previously months ago,  Affinity was fine, no lines.  

I do not know about special settings nor driver updates needed. I would need simplistic detail instructions if I need to do changes beyond the regular consumer user interface.

[Hangman]

Hi @Caryl and welcome to the forums,

If you disable Hardware Acceleration in the Performace Settings/Preferences and re-export your file the white horizontal lines should (hopefully) no longer appear... assuming you currently have Hardware Acceleration enabled of course...

[Caryl]

Hello, I went through the steps and did not have hardware acceleration on. But I thoroughly go over this check.

Retried the program with the same results.  There seems to be some type of bug on Affinity. 

[Caryl]

Thank you very much for your advice though. @Hangman 

[Hangman]

Hi @Caryl,

Thanks for confirming...

Would you be able to do two things...

1. Upload a screenshot showing the Performance Settings just in case there is anything else that stands out and might need to be changed
2. Upload a sample image where you're seeing the issue with the horizontal lines - or does it happen with all images?

[Caryl]

Hello,

Thank you for your reply.

The lines happen on all images.

I am not sure if this is what you need, I don't fully understand.

I reached out to support, but they don't have any answers yet.

So thank you.

[R C-R]

1 hour ago, Caryl said:

I am not sure if this is what you need, I don't fully understand.

I think what is being asked for is the Performance Settings in Affinity itself, where you see things like RAM use limit & such.

[Caryl]

Thank you for being patient. Is this it?

[R C-R]

1 minute ago, Caryl said:

Is this it?

Yes, I think so. As it shows, you have hardware acceleration enabled ("Enable OpenCL....") so perhaps disable that & restart to see if it makes any difference.

[Hangman]

Hi @Caryl,

As @R C-R mentions, this is indeed the 'Hardware Acceleration enabled Enable OpenCL compute acceleration' that you need to turn off. This will require yoo to reboot Affinity Photo but it 'should' resolve the horizontal white line issue.

Let us know how you get on and whether or not it fixes the issue for you or if you still see the same problem after disabling it.

[KarinC]

I'm curious about hardware acceleration. It seems that having it enabled always causes problems. Why does it come with enabled selected as a default. Are there times when having it enabled doesn't cause problems?

[R C-R]

3 hours ago, KarinC said:

I'm curious about hardware acceleration. It seems that having it enabled always causes problems. Why does it come with enabled selected as a default. Are there times when having it enabled doesn't cause problems?

As I understand it, many if not most configurations of hardware & graphics drivers work fine with it enabled but it just does not work well with some others. It may just seem that it doesn't work with most of them because only users that have problems with it enabled are likely to post about that.

[KarinC]

58 minutes ago, R C-R said:

As I understand it, many if not most configurations of hardware & graphics drivers work fine with it enabled but it just does not work well with some others. It may just seem that it doesn't work with most of them because only users that have problems with it enabled are likely to post about that.

I had to disable it in order for Designer to not start lagging really bad after a short time of use. I almost decided not to get it after the trial and was looking elsewhere because I thought I couldn't afford the kind of computer I would need to run it. Somehow I ran across instructions on turning hardware acceleration off, which I did then it worked great. I don't have the greatest computer in the world but it isn't bad, either. I wonder how many people decide not to even bother with an Affinity program when they don't know about the hardware acceleration. It just seems that it should be off by default then people who have better computers can choose to turn it on if they have the right configuration. 

I'm not a total newbie to computers and computer graphics, btw. I designed my first book in WordPerfect in DOS (for young folks that was the operating system before Windows). 

[R C-R]

2 hours ago, KarinC said:

It just seems that it should be off by default then people who have better computers can choose to turn it on if they have the right configuration. 

Quite a few users have suggested that the default should be off, but keep in mind that it isn't so much about how powerful the computers are per se, as it is about the huge number of possible hardware & graphics driver software combinations there are that the apps can run on, particularly for Windows users.

So in many cases, to get acceleration to work perfectly well, it is just a matter of finding & installing a compatible driver for the GPU. Since that isn't something Serif can control, & there are far too many hardware/software combos for Serif to check more than a tiny fraction of them, & there are real benefits to using acceleration where possible, it seems that Serif has decided that the default should be enabled, & if that causes any problems they hope users will post here in the forums or do a web search to find out how to resolve them.

[Caryl]

@Hangman  - Thank you very much.  It worked, I am  very grateful. 

So this is how it was done # Solution for lines after export problem-

1. Within your open Affinity program - 2. go to Preferences - 3. go to Performance - 4. On that page uncheck *Hardware Acceleration - 6. Restart your computer

problem-

Within your Affinity program  - this is a screenshot of the solution to the  *lines after export*  problem

[Hangman]

Hi @Caryl,

That’s really good to hear, I’m glad everything is exporting correctly for you now, thanks for letting us know 😊

[Caryl]