[Bug 27959] GL_ARB_map_buffer_range is slow on Nvidia GPUs with multiple monitors

wine-bugs at winehq.org wine-bugs at winehq.org
Thu Oct 20 20:37:12 CDT 2011


http://bugs.winehq.org/show_bug.cgi?id=27959

--- Comment #21 from Alexey Loukianov <mooroon2 at mail.ru> 2011-10-20 20:37:12 CDT ---
(In reply to comment #20)
> Yes, Xinerama seems to be the needed to trigger this bug.
> ...
> Should you be unable to reproduce, I do have to note that both monitors have a
> different resolution (1248x1024 and 1024x786), but I don't really think this
> matters.

Ok, thanks for providing this information. AFAIRC, there were some warnings
about OpenGL vs. Xinerama in nVIDIA Driver readme but I can't tell for sure.
Going to re-read readme and report here in case anything relevant found. My
setup also includes monitors running at different resolutions, notably 1280x960
and 1680x1050. Would try to configure my xorg to use Xinerama instead of
TwinView today and check for performance issues in Unigine Heaven benchmark.
OTOH I've got around ~30-50 FPS with my 550 Ti in this benchmark when testing
@1680x1050 with MODERATE amount of tesselation enabled (using NORMAL and
EXTREME tesselation profiles bring the FPS down to 5-10-15 level) so it isn't
running "fast" in any case. Hope it wouldn't prevent me to spot the
Xinerama-related FPS drop if there would be any.

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