[New stuttering issue that behaves in a way, I have never seen before]

People with modern Radeon hardware / software have been having issues with stuttering and poor performance for a while now (read years).

 

Game client slowing down when you open Black Lion is normal. Though 'flickering Windows taskbar' does not sound like anything I have ran into. Are you running the game in 'Full screen' mode or' Windowed full screen'?

 

I found some success in defeating stuttering issues with my Radeon hardware by separately installing Microsoft DirectX 9 libraries into windows 10 and forcing the game to run with DX9 instead of Windows 10 default. (DX12 I think).

More details in other thread:

https://en-forum.guildwars2.com/topic/60175-low-fps-with-5700xt/?do=findComment&comment=1401902

 

[Signing in issues now in the last 2 hours?]

Timed out and unable to log back in
Error Code: 58:11:5:535

[Low FPS with 5700xt]

Bit of a necro...

 

I too have been suffering from severe performance issues with Radeon RX5700 XT. I have been using d912pxy to make the game somewhat playable, but not really happy with that solution. Inspired by some other forums and Youtube-videos I tried running the game with DX9 libraries and what a difference. Everything runs silky smooth, no sign of the stuttering and poor refresh rate.

 

So steps I took:

1. Download and install DX9 standalone from Microsoft. NOTE! You still need to run the installer after you extract files from the downloaded package. 
 (do not trust random download sources) http://www.microsoft.com/en-us/download/confirmation.aspx?id=8109
2. Add "-force-d3d9" to the game launcher target. So it should be something like ("...\Guild Wars 2\Gw2-64.exe" -force-d3d9)

3. Remember to uninstall d912pxy or similar if you have it installed

 

(OPTIONAL):
* Run this program as Administrator
* Disable fullscreen optimizations

 

I have not done any extensive testing but so far things look very promising.

[GW2 and AMD Radeon VII]

I have had some success making the game work with Radeon cards / drivers by installing DX9 libraries to windows 10 and forcing the game run with DX9 instead of Windows 10 default.

More details in this thread:
Low FPS with 5700xt - Page 2 - Account & Technical Support - Guild Wars 2 Forums