[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 17:55:34 CDT 2011


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

--- Comment #20 from Steven <redalert.commander at gmail.com> 2011-10-20 17:55:34 CDT ---
(In reply to comment #18)
> Steven, could you please be more precise on how should I configure my Xorg
> installation and what is the exact commandline to use when running Unigine
> Heaven benchmark to spot the performance issues you had reported? I also use
> dual-screen setup at home and used to use nVIDIA TwinView (a.k.a. MetaModes)
> tech to get desktop spanned over both monitors. Should I reconfigure my
> installation to use Xinerama to reproduce the bug?

Yes, Xinerama seems to be the needed to trigger this bug.
As for the Unigine commandline arguments, I'm not sure about the exact command
line, but I'm sure it was something simple if just running the binary doesn't
give the desired results. Certainly nothing fancy.

I cant reproduce right now as I'm running nouveau drivers, due to an
incompatibility between xserver 1.11 and the nvidia 275 drivers (current Debian
testing). I'm not to keen on installing the drivers from nvidia directly as I
always needed to reinstall them after a kernel or X upgrade and I'm to lazy to
downgrade the xserver. Although I'm eager to try out the 285 driver (currently
in Debian experimental), I'll do so as soon as they go into testing.

That said, the clue is definately xinerama, twinview does not appear to be
affected, neither are separate x screens or single monitor setup.
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.

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