kernel version: Distribution: Fedora Hardware Environment: CPU : AMD Phenom X4 9850BE MB : ASUS m3n78 pro MB Chipset : nForce 730a FireWire (IEEE 1394): Agere Systems FW323 (rev 70) Problem Description: $ dmesg [...] ACPI: PCI Interrupt Link [APC4] enabled at IRQ 19 firewire_ohci 0000:01:0a.0: PCI INT A -> Link[APC4] -> GSI 19 (level, low) -> IR Q 19 gameport: EMU10K1 is pci0000:01:09.1/gameport0, io 0xc800, speed 562kHz firewire_ohci: failed to set phy reg bits. firewire_ohci 0000:01:0a.0: PCI INT A disabled firewire_ohci: probe of 0000:01:0a.0 failed with error -5 [...] device name doesn't be creatived in /dev/
Created attachment 18002 [details] lspci -vvv
Created attachment 18003 [details] dmesg
Could you try with the older alternative ohci1394 driver? For example, boot from a live CD of another Linux distro if you don't know how to install the ohci1394 driver on Fedora. Also, do you have the means to test the FireWire port with a different OS?
Feel free to reopen if you were able to gather more information (e.g. from a test with the old drivers or with a newer Fedora kernel).