Description of problem:
Starting with FC6 I can't get Xorg to detect my video card, which used to work
with FC4 and FC5. The card is an on-board ATI Radeon 7000/VE on a IBM xSeries
206, and by "detect" I mean it's not listed in the PCI scan of Xorg.0.log.

The actual error in the log is:
>(II) Primary Device is: ISA
>(II) ATI:  Candidate "Device" section "Videocard0".
>(EE) No devices detected.
>
>Fatal server error:
>no screens found


Output of lspci:
>00:00.0 Host bridge: Intel Corporation 82875P/E7210 Memory Controller Hub (rev 02)
>00:03.0 PCI bridge: Intel Corporation 82875P/E7210 Processor to PCI to CSA
Bridge (rev 02)
>00:1c.0 PCI bridge: Intel Corporation 6300ESB 64-bit PCI-X Bridge (rev 02)
>00:1d.0 USB Controller: Intel Corporation 6300ESB USB Universal Host Controller
(rev 02)
>00:1d.1 USB Controller: Intel Corporation 6300ESB USB Universal Host Controller
(rev 02)
>00:1d.4 System peripheral: Intel Corporation 6300ESB Watchdog Timer (rev 02)
>00:1d.5 PIC: Intel Corporation 6300ESB I/O Advanced Programmable Interrupt
Controller (rev 02)
>00:1d.7 USB Controller: Intel Corporation 6300ESB USB2 Enhanced Host Controller
(rev 02)
>00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 0a)
>00:1f.0 ISA bridge: Intel Corporation 6300ESB LPC Interface Controller (rev 02)
>00:1f.2 IDE interface: Intel Corporation 6300ESB SATA Storage Controller (rev 02)
>00:1f.3 SMBus: Intel Corporation 6300ESB SMBus Controller (rev 02)
>02:01.0 Ethernet controller: Intel Corporation 82547GI Gigabit Ethernet Controller
>04:02.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon
7000/VE]


PCI scan from Xorg.0.log:
>(II) PCI: PCI scan (all values are in hex)
>(II) PCI: 00:00:0: chip 8086,2578 card 1014,02ae rev 02 class 06,00,00 hdr 00
>(II) PCI: 00:03:0: chip 8086,257b card 0000,0000 rev 02 class 06,04,00 hdr 01
>(II) PCI: 00:06:0: chip 8086,257e card 0000,0000 rev 02 class 08,80,00 hdr 00
>(II) PCI: 00:1c:0: chip 8086,25ae card 0000,0000 rev 02 class 06,04,00 hdr 01
>(II) PCI: 00:1d:0: chip 8086,25a9 card 1014,02ad rev 02 class 0c,03,00 hdr 80
>(II) PCI: 00:1d:1: chip 8086,25aa card 1014,02ad rev 02 class 0c,03,00 hdr 00
>(II) PCI: 00:1d:4: chip 8086,25ab card 1014,02ad rev 02 class 08,80,00 hdr 00
>(II) PCI: 00:1d:5: chip 8086,25ac card 1014,02ad rev 02 class 08,00,20 hdr 00
>(II) PCI: 00:1d:7: chip 8086,25ad card 1014,02ad rev 02 class 0c,03,20 hdr 00
>(II) PCI: 00:1e:0: chip 8086,244e card 0000,0000 rev 0a class 06,04,00 hdr 01
>(II) PCI: 00:1f:0: chip 8086,25a1 card 0000,0000 rev 02 class 06,01,00 hdr 80
>(II) PCI: 00:1f:1: chip 8086,25a2 card 1014,02ad rev 02 class 01,01,8a hdr 00
>(II) PCI: 00:1f:2: chip 8086,25b0 card 1014,02ad rev 02 class 01,04,8f hdr 00
>(II) PCI: 00:1f:3: chip 8086,25a4 card 1014,02ad rev 02 class 0c,05,00 hdr 00
>(II) PCI: 02:01:0: chip 8086,1075 card 1014,02ad rev 00 class 02,00,00 hdr 00
>(II) PCI: End of PCI scan


Version-Release number of selected component (if applicable):
I tried every FC6 kernel and every Xorg update.


Additional info:
I'm using the "ati" driver. The "fbdev" one works though.
I tried with an external video card (PCI ATI RageXL) but it's not detected either.