Since I upgraded to xorg-x11-server-Xorg-1.2.99.902-1.fc7, XineramaQueryScreens() only returns information about the first screen, although a second one exists. This breaks Xinerama-aware applications, including metacity, because they are unable to determine the size of the second screen. Please see attached small C program that I wrote as a debugging aid; this is its output on my system: screen count: 2; default screen: 0 [screen 0] width=1920 height=1200 [screen 1] width=1024 height=768 Xinerama is active. Xinerama: found 1 screens [screen 0] x_org=0 y_org=0 width=1920 height=1200 Also attached is my xorg.conf. I'm running Nvidia binary driver version 9746; note that Xinerama has worked with this driver version with the xorg-x11-server-Xorg I was running earlier. Sorry, I don't have its version number any more. Regards, Jan
Created attachment 150822 [details] The test program mentioned in the report
Created attachment 150823 [details] My xorg.conf
Update: not fixed by upgrading to Nvidia version 9755. The problem is that screenInfo.numScreens within the X server is 0. Trying to figure out why...
Okay, got the last one wrong. screenInfo.numScreens was in fact correctly initialized. The problem was that PanoramiXNumScreens wasn't, because PanoramiXExtensionInit() was never called. And it's correct that it wasn't, as Xinerama isn't enabled in xorg.conf. So, the actual source of the problem is that the server reports Xinerama to be enabled although it actually isn't, and the Xinerama extension then of course isn't working properly.
Hi, Jan, we really cannot support 3rd party proprietary "nvidia" video driver, and there is no way how to persuad us that the bug is in our Xserver and not in their drivers. So, I am closing this for now as CANTFIX (because we really cannot fix it), and when you will be able to reproduce the bug with nv (or vesa) drivers, feel free to reopen this bug (while attaching to this bug uncompressed separate attachments of /etc/X11/xorg.conf and /var/log/Xorg.0.log demonstrating the problem). Thanks a lot, and sorry that I cannot help you immediately.