ACPI events generated on PCI usage.

Sorry if this is a repeat, the list seemed to have filtered out the last one.

Since upgrading to the 2.6 series of kernel I have noticed the events/0 process consuming processor time any time I use a PCI device. For example, when I play sound on my SB Live, the events/0 consumes ~15% of my processor. It doesn't effect AGP, or onboard devices. I turned ACPI debugging on and found that when these devies are in use a constant stream of DEVICE WAKE events are generated.

Is there any way to prevent or ignore these events to avoid wasting processor time on them?

Debug log with debug_level=0xff:

Execute Method: [\_GPE._L05] (Node dff61e68)
psxface-0124 [18] psx_execute : **** Begin
Method Parse **** Entry=dff61e68 obj=dff61de8
psparse-1062 [19] ps_parse_aml : Entered
with walk_state=dff6a428 Aml=e0802a16 size=0
psparse-1085 [19] ps_parse_aml :
State=dff6a428
psparse-0672 [20] ps_parse_loop : Opcode 0086
[Notify] Op dff691e8 Aml e0802a17 aml_offset 00000
psparse-0672 [20] ps_parse_loop : Opcode 000A
[ByteConst] Op dfe81368 Aml e0802a22 aml_offset 0000B
psscope-0254 [21] ps_pop_scope : Popped Op
dff691e8 Args 0
psparse-0967 [20] ps_parse_loop : Popped
scope, Op=dff691e8
psscope-0254 [21] ps_pop_scope : Popped Op
00000000 Args 0
psparse-0967 [20] ps_parse_loop : Popped
scope, Op=00000000
psparse-0982 [20] ps_parse_loop : AML package
complete at Op 00000000
psscope-0254 [21] ps_pop_scope : Popped Op
00000000 Args 0
psparse-1099 [19] ps_parse_aml : Completed
one call to walk loop, AE_OK State=dff6a428
psparse-1152 [19] ps_parse_aml :
return_value=00000000, State=dff6a428 dswstate-0743 [19] ds_get_current_walk_st: Current walk_state 00000000
psxface-0170 [18] psx_execute : **** Begin
Method Execution **** Entry=dff61e68 obj=dff61de8
psparse-1062 [19] ps_parse_aml : Entered
with walk_state=dff6a428 Aml=e0802a16 size=0
psparse-1085 [19] ps_parse_aml :
State=dff6a428
psparse-0672 [20] ps_parse_loop : Opcode 0086
[Notify] Op dff691e8 Aml e0802a17 aml_offset 00000
psparse-0672 [20] ps_parse_loop : Opcode 000A
[ByteConst] Op dff68d68 Aml e0802a22 aml_offset 0000B
psscope-0254 [21] ps_pop_scope : Popped Op
dff691e8 Args 0
psparse-0967 [20] ps_parse_loop : Popped
scope, Op=dff691e8
exnames-0289 [24] ex_get_name_string :
root_prefix(\) at e0802a17
exnames-0330 [24] ex_get_name_string :
dual_name_prefix at e0802a18
exnames-0188 [25] ex_name_segment : Bytes from
stream:

 exnames-0194 [25] ex_name_segment       : _
 exnames-0194 [25] ex_name_segment       : S
 exnames-0194 [25] ex_name_segment       : B
 exnames-0194 [25] ex_name_segment       : _
 exnames-0188 [25] ex_name_segment       : Bytes from
stream:
 exnames-0194 [25] ex_name_segment       : P
 exnames-0194 [25] ex_name_segment       : C
 exnames-0194 [25] ex_name_segment       : I
 exnames-0194 [25] ex_name_segment       : 0

evmisc-0121 [22] ev_queue_notify_reques: Dispatching
Notify(2) on node dff610e8
evmisc-0133 [22] ev_queue_notify_reques: Notify
value: Device Wake
evmisc-0199 [22] ev_queue_notify_reques: No notify
handler for [PCI0] node dff610e8
psscope-0254 [21] ps_pop_scope : Popped Op
00000000 Args 0
psparse-0967 [20] ps_parse_loop : Popped
scope, Op=00000000
psparse-0982 [20] ps_parse_loop : AML package
complete at Op 00000000
psscope-0254 [21] ps_pop_scope : Popped Op
00000000 Args 0
psparse-1099 [19] ps_parse_aml : Completed
one call to walk loop, AE_OK State=dff6a428
psparse-1152 [19] ps_parse_aml :
return_value=00000000, State=dff6a428 dswstate-0743 [19] ds_get_current_walk_st: Current walk_state 00000000
acpi_bus-0492 [15] acpi_bus_notify : Received
DEVICE WAKE notification for device [PCI0]
...

I am running a vanilla 2.6.2 kernel. I also tried adding the latest ACPI patches which had no effect.

I am using an Epox 8kha+ mobo, with an AthlonXP 2200+ output of lspci:

00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333 AGP]
00:0a.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 0a)
00:0a.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 0a)
00:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 02) 00:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 02)
00:0c.0 Ethernet controller: Linksys Network Everywhere Fast Ethernet 10/100 model NC100 (rev 11) 00:11.0 ISA bridge: VIA Technologies, Inc. VT8233 PCI to ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)
00:11.2 USB Controller: VIA Technologies, Inc. USB (rev 1b)
00:11.3 USB Controller: VIA Technologies, Inc. USB (rev 1b)
00:11.4 USB Controller: VIA Technologies, Inc. USB (rev 1b)
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235 AC97 Audio Controller (rev 30) 01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 03)

Thanks!
--
Chad LeClair

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