[Bug 56444] New: Plogue sforzando GUI is always one animation frame behind

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56444

            Bug ID: 56444
           Summary: Plogue sforzando GUI is always one animation frame
                    behind
           Product: Wine
           Version: 9.4
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: d2d
          Assignee: wine-bugs(a)winehq.org
          Reporter: s_chriscollins(a)hotmail.com
      Distribution: ---

Created attachment 76204
  --> https://bugs.winehq.org/attachment.cgi?id=76204
video showing the bug

The free VST plugin Plogue sforzando always lags one animation frame behind
what it should be. I believe this might only happen with NVIDIA GPUs, as the
issue does not occur on my laptop (radeon driver) or in VirtualBox. Please see
the attached video for a demonstration of the bug.

STEPS TO REPRODUCE
1. Download and install Plogue sforzando: https://www.plogue.com/downloads.html
2. Launch "sforzando x64" from the application menu.
3. Click on the tabs and keyboard keys.

ACTUAL RESULT
The GUI always displays the preceding frame generated by the application, but
not the current frame, making things appear laggy/unresponsive, etc.

EXPECTED RESULT
The GUI should update as soon as I click on an interactable element.

MY COMPUTER
OS: KDE Neon 6.0 User Edition (Plasma Desktop 6.0.2, KDE Frameworks 6.0.0, Qt
6.6.2)
Linux Kernel: 6.5.0-25-lowlatency (64-bit)
Motherboard: ASRock X58 Extreme3 (Intel X58 chipset)
CPU: Intel Core i7-990x Gulftown (3.46 GHz hexa-core, Socket 1366) @ 4.15 GHz
RAM: 24GB (6x G.Skill 4GB DDR3 PC3-10666 1333 MHz) @ 1430 MHz
Video: EVGA NVIDIA GeForce RTX 2080 SUPER w/ 8GB RAM
NVIDIA video driver: 550.54.14

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[Bug 56444] Plogue sforzando GUI is always one animation frame behind

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56444

S. Christian Collins <s_chriscollins(a)hotmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://www.plogue.com/down
                   |                            |loads.html

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[Bug 56444] Plogue sforzando GUI is always one animation frame behind

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56444

--- Comment #1 from Nikolay Sivov <bunglehead(a)gmail.com> ---
I believe this is specific to nvidia driver, and was happening for years in d2d
applications. I don't know if we had any workarounds for that.

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[Bug 56444] Plogue sforzando GUI is always one animation frame behind

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=56444

Xj <xj(a)wp.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xj(a)wp.pl

--- Comment #2 from Xj <xj(a)wp.pl> ---
I can confirm this bug. It's definitely related to nvidia drivers. I test it
both on GT 710 and GT 1030. It's not happening on nouveau or modeset ddx
driver.
Is there some workaround for this? Or may be something that I can try to debug
the reason so then I could report it to nvidia?

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