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Very annoying bug on new laptops

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Sander02
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Posts: 27
Joined: 2018-06-16 10:53

Very annoying bug on new laptops

Post by Sander02 »

Hi,

UltraVNC has issues with latest Dell laptops which are so irritating that you don't want to use vnc anymore. I think all versions of vnc have this issue.
What happens is that it not refreshing the screen. But it is not the total screen, so the refresh button in uvnc menu bar does not solve it. It is within a program.

For example, open notepad, then menu file, nothing happens. Then move your mouse to taskbar above notepad.
A little preview screen will appear just above taskbar. After holding mouse above that preview screen, the menu file is visual.
I'm not 100% sure, but I believe the remote user get the same issue will the session is open.

Anyone else experienced this? for example a Dell Latitude 5520. It as Intel Iris Graphics.

Thanks,

Sander
Sander02
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Posts: 27
Joined: 2018-06-16 10:53

Re: Very annoying bug on new laptops

Post by Sander02 »

Also when starting a program, it will not show up, only on taskbar. Holding mouse above and it will appear.
Sander02
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Posts: 27
Joined: 2018-06-16 10:53

Re: Very annoying bug on new laptops

Post by Sander02 »

Also the local user of the computer that is taken over with uvnc experience the same issue.

Would be great if there is a fix. We use it for daily support on a lot of computer.
SkyBeam
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Posts: 118
Joined: 2012-12-31 11:01

Re: Very annoying bug on new laptops

Post by SkyBeam »

If I remember correctly this happens on Windows 10 1909 only when using desktop duplication driver. The problem disappears if upgrading to latest (21H2) version. I am not fully sure if it was also OK disabling desktop duplication on server side.
It is definitively an issue with desktop capturing on server side but as I remember only on a version which is already out of support (version 1909 reached end of servicing on May 11th 2021).

So I do recommend to update your Windows and GPU drivers and if there is no possibility to do so you might try disabling desktop duplication driver.
Sander02
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Posts: 27
Joined: 2018-06-16 10:53

Re: Very annoying bug on new laptops

Post by Sander02 »

Hi SkyBeam, thanks for your reply. We are on 20H2 and will not update to a newer built any soon. The new machines have the latest drivers. Not all have GPU's. I'm not familiar with desktop duplication drivers. I just searched for it and found uvnc documentation. It's under properties and not under admin properties where I first looked. DD is off by default. Have not yet tested what happens if I enable it. If this will not solve it, any other suggestion?
SkyBeam
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Posts: 118
Joined: 2012-12-31 11:01

Re: Very annoying bug on new laptops

Post by SkyBeam »

Well, Windows 10 20H2 end of servicing life was reached already on 10th of May 2022 (Home, Pro). Only Enterprise and Edu seems to get extended support until 9th of May 2023.
I just remember I had this screen update problem on older Windows 10 release and update to 21H2 I believe where the problem disappeared. You might also try an older UVNC release on server side (e.g. 1.2.4.0 release). However be aware that some security fixes were done in newer version so you might want to apply additional protection. I would recommend to try enabling/disabling DD engine and enable/disable system hook (all in uvnc_settings.exe "Screen Capture" tag). Remember to restart the service if you change the option.
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