[BasementCat]

I'm running UrT on a Win 7 box with an Nvidia GeForce GT 540M (via Optimus) and it seems to completely ignore my r_gamma setting on startup. If I go and set r_gamma manually (e.g. with /r_gamma 1.51) then it works just fine, but I have to do that every time I start UrT. Putting it in autoexec.gfg doesn't work. If I check r_gamma on startup (before manually setting it) it says 1.5, and if I set it to 1.5 again nothing happens --- I have to change it to e.g. 1.51 for it to register.

Now, after I updated the gfx driver to the latest version, it even resets gamma in-game every 10 minutes or so --- it didn't do that before and I only had to set/change gamma if I alt-tabbed out or restarted the game. I've tried disabling the desktop wallpaper slideshow (as suggested in another thread), but that didn't work.

Any help/ideas would be greatly appreciated, because as it is now, I have a bind to change gamma every time if fucks up, but it's still annoying as hell to play with.

Oh yeah, I've tried messing around with r_ignorehwgamma and r_ext_gamma_control but to no avail.

[|it|Nexu]

Try another OpenGL title like OpenArena or QuakeLive (preferably those since they uses pretty much same rendering code) and see or the issue remain; if so it's driver related problem with the OpenGL drivers of NVIDIA.

[BasementCat]

Thanks. I'll try that. Downloading OpenArena now.

[BasementCat]

Yeah, OpenArena doesn't keep the setting either. Or rather, r_gamma retains its set value, but the gfx driver doesn't react to it before I change it. Curse you Nvidia!

[|it|Nexu]

NVIDIA isn't the only one. AMD also pay less attention to their OpenGL drivers (on Windows platform) these days.
Try rolling back to older drivers that support your graphics chipset.

[BasementCat]

Yeah, I'm afraid that's the only option, and even then it won't work completely, because the GT 540M is a relatively new card, so there are not a whole lot of older drivers to fall back on.

Anyways, thanks for your help. Having the problem located makes it a little easier to fix eventually.