[Bug 38166] Heroes of Might and Magic V performance issue: severe fps drop on certain maps

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=38166

michal.dybczak at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |michal.dybczak at gmail.com

--- Comment #15 from michal.dybczak at gmail.com ---
The bug still exists on wine 4.6 or Proton 4.2 on Nvidia proprietary drivers.

When I run the game on Intel proprietary drivers, all is fine, no chopping,
60-120 FPS all the time.

On Nvidia I can get 220-350 FPS but it quickly drops to 1-2 FPS when new map,
screen, fight loads and then it's hard to change settings to unlock it to the
full FPS... So all in all, this game is completely unplayable on Nvidia. It
runs but it's really a torment. On Intel, all is fine. Well... not completely,
because there are many artifacts and graphical glitches but they went away when
I set graphics to Low (and thus got rid of flickering shadows and other bugs on
Intel) and then the game is fully playable and enjoyable.

It confirms suspicions that the bug may be in Nvidia drivers or in the way how
Wine interacts with Nvidia drivers.

Since the game is really old and not hardware demanding if someone has an
option to switch to Intel (on hybrid GPUs) this is the best way to play it
currently.

Or alternatively, use wine 1.2.2 if the game runs fine on it.

For those trying to debug it, it would be interesting to look through changes
between 1.2.2 and the next release that introduced this bug.

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