I have a very annoying problem where my Radeon card can only be initialized once by Xorg. The second time I get this:

(II) Attempted to read BIOS 128KB from /sys/bus/pci/devices/0000:03:03.0/rom: got 0KB
Requesting insufficient memory window!: start: 0xfeb00000 end: 0xfebfffff size 0x8000000
(EE) Cannot find empty range to map base to
(EE) RADEON(0): Cannot read V_BIOS (3)
(WW) RADEON(0): Restoring MEM_CNTL (00000000), setting to 00002e00
(--) RADEON(0): Chipset: "ATI Radeon VE/7000 QY (AGP/PCI)" (ChipID = 0x5159)
(--) RADEON(0): Linear framebuffer at 0xf0000000
(--) RADEON(0): BIOS at 0xfebc0000
(II) RADEON(0): PCI card detected
(II) Attempted to read BIOS 64KB from /sys/bus/pci/devices/0000:03:03.0/rom: got 0KB
Requesting insufficient memory window!: start: 0xfeb00000 end: 0xfebfffff size 0x8000000
(EE) Cannot find empty range to map base to
(WW) RADEON(0): Video BIOS not detected in PCI space!
(WW) RADEON(0): Attempting to read Video BIOS from legacy ISA space!
(II) RADEON(0): Legacy BIOS detected

The card is the second card of the machine, so it is not initialized by BIOS. It does however work just dandy during the first go. It's the second invocation of Xorg that always fails.