OpenTK + Fedora

Can you please find out the exact version of Fedora, Xorg and video card / drivers in use?

OpenTK relies on the XRandR protocol to obtain information about available display devices and it seems that this specific implementation is either returning invalid data (a monitor with width = 0). It is relatively easy to turn off monitor detection when OpenTK receives invalid data, but it would be nice to pinpoint the exact culprit before adding any workarounds.

Thank you, I am downloading a version of Fedora 11 to test with. OpenTK is tested and known to work on Arch, Gentoo, Debian, Ubuntu, (open)SUSE and RHEL. I have also used it successfully on older Fedora versions, but this distribution is not tested regularly as it contains way too much unstable software for its own good.

XRandR provides a way to query available display devices and control their resolutions. It is used by the DisplayDevice class (which is used by the GameWindow constructor, in turn). It is an essential part of OpenTK and a broken XRandR implementation is bound to cause problems.

I don't think this can be worked around without modifying OpenTK (if I had an easy solution, I'd have posted it). I have installed a Fedora virtual machine, but it is still installing updates after a whole day (haven't had a chance to even install mono).

Edit: I cannot confirm the issue. The samples included in Examples.exe 0.9.8-1 seem to work fine on Fedora 11.

Which version of OpenTK are you using?

I just tested 0.9.9-0 and it seems to behave identically to 0.9.8-1 in this regard. You could be hitting a driver or Xorg bug.

Are you using multiple monitors?

I doubt it, but I don't have any way to test that (I am using a virtual machine for Fedora and the OS cannot access the actual monitor).

Two suggestions:

• Try running "xrandr" from a terminal. If XRandR is working correctly, this command should return a list of supported resolutions. Try switching resolutions with "xrandr -s n", where n is a number like 0, 1, 2, ... (0 restores the original resolution).
• If the above fails, you should definitely log a bug report against the video card drivers. Ati's OSS developers are pretty good in fixing issues like this.

Edit: Fedora 11 shipped with unstable OSS drivers for Ati. To give you an idea of how unstable, they used code that wouldn't be merged to mainline for at least 6 more months.

Fedora has always been notorious for shipping bleeding edge software, but this specific release was pretty reckless: experimental Xorg, Mesa and kernel DRM versions, various WIP branches for Radeon and Nouveau... Hopefully, 3d drivers will be much more stable once Fedora 12 comes around.