Title says it all... Xorg.0.log, xorg.conf and lspci -vvnn will be attached shortly If any more information (debugging data or whatever) is required please let me know. Reproducible: Always Steps to Reproduce:
Created attachment 216944 [details] emerge --info
Created attachment 216945 [details] Xorg.0.log
Created attachment 216947 [details] lspci -vvnn
Created attachment 216948 [details] xorg.conf
Could be the same problem I am having except I can make it happen without Xinerama. See bug #301469
Please attach the output of nvidia-report-bug.sh (or whatever the script is called, don't remember exactly). Thanks
Running nvidia-bug-report.sh.../usr/bin/nvidia-bug-report.sh: line 342: 4220 Segmentation fault nvidia-settings -q all 2>&1 This can't be a good sign.
disable xinerama, start up X, change all the x server positioning to absolute in nvidia-settings, and then re-enable xinerama, see if that works for you
Need more info if this is still happening.