[2.6.18 AMD64] atiixp: codec read timeout

[lkml@prettybrd.com]

Trying to get sound working on a DFI INFINITY RS482 I am getting a  
barrage of these errors. Here is the what I am seeing in dmesg

atiixp: codec read timeout (reg 0)
atiixp: codec read timeout (reg 3c)
atiixp: codec read timeout (reg 1c)
...
atiixp: codec read timeout (reg 0)
atiixp: codec read timeout (reg 3c)
atiixp: codec read timeout (reg 1c)
AC'97 2 does not respond - RESET
AC'97 2 access is not valid [0xffffffff], removing mixer.
atiixp: no codec available

I get the same error with ACPI disabled (both in BIOS and with the  
'noacpi' kernel option), as well as when I disable SMP. I also tried  
with a 32bit kernel, but run into the same problem.

My .config can be found here:
http://www.prettybrd.com/~leedo/config

The output of lspci is:

00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 10)
00:01.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge
00:11.0 IDE interface: ATI Technologies Inc ATI 437A Serial ATA  
Controller (rev 80)
00:12.0 IDE interface: ATI Technologies Inc ATI 4379 Serial ATA  
Controller (rev 80)
00:13.0 USB Controller: ATI Technologies Inc IXP SB400 USB Host  
Controller (rev 80)
00:13.1 USB Controller: ATI Technologies Inc IXP SB400 USB Host  
Controller (rev 80)
00:13.2 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host  
Controller (rev 80)
00:14.0 SMBus: ATI Technologies Inc IXP SB400 SMBus Controller (rev 81)
00:14.1 IDE interface: ATI Technologies Inc Standard Dual Channel PCI  
IDE Controller ATI (rev 80)
00:14.3 ISA bridge: ATI Technologies Inc IXP SB400 PCI-ISA Bridge (rev 80)
00:14.4 PCI bridge: ATI Technologies Inc IXP SB400 PCI-PCI Bridge (rev 80)
00:14.5 Multimedia audio controller: ATI Technologies Inc IXP SB400  
AC'97 Audio Controller (rev 80)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8  
[Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8  
[Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8  
[Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8  
[Athlon64/Opteron] Miscellaneous Control
01:05.0 VGA compatible controller: ATI Technologies Inc RS482 [Radeon  
Xpress 200]
02:09.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host  
Controller (rev 80)
02:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169  
Gigabit Ethernet (rev 10)


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