So I just finished installing Fedora Core 5 (dual-boot install of both the x86_64 and i386 arches) on an eMachines Athlon-64 desktop and ran into two problems :

• Ethernet not working : The forcedeth device would get an IP address but then lost it and was unable to re-acquire. And a very similar problem happened when an rtl8139 NIC was installed. Apparently, turning off ACPI in the BIOS fixed both of these ethernet problems.
  
  
• No Cursor in X Windows : This was a simple fix, I just added

  
        Option "HWCursor" "off"
  
  

  to the /etc/X11/xorg.conf file within the "nv" driver section and it now works nicely.