Bug 5283

Summary: Incorrect detection of PM-Timer ioport on ASUS a8v
Product: ACPI Reporter: Jonas Oreland (jonas)
Component: Config-TablesAssignee: acpi_aml-interpreter
Status: CLOSED CODE_FIX    
Severity: normal CC: acpi-bugzilla, john.stultz
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.12.5 Subsystem:
Regression: --- Bisected commit-id:
Attachments: dmesg and lspci
patch for handling xpm_pmtmr 0 case

Description Jonas Oreland 2005-09-21 01:08:53 UTC 
Most recent kernel where this bug did not occur:
Distribution: Gentoo
Hardware Environment: ASUS a8v deluxe
Software Environment:
Problem Description:

I running 2.6.12-gentoo-r10
I have a ASUS a8v motherboard with a AMD64 X2

This gives me problem with clock drift
(see http://bugzilla.kernel.org/show_bug.cgi?id=5105)

So I tried using notsc to force usage of pm timer.

But!
The the acpi code find the fadt->xpm_tmr_blk.address to 0
Making the code yet again fall back to PIT/TSC

I booted my system and run
perch> grep PM_ /proc/ioports 
0808-080b : PM_TMR

And harded the address 0x808 into pmtmr_ioport
This works. The system is using pmtmr and I get no clock drift
(tested now for ~a day)

But why do ACPI find 0 as pmtmr_ioport?
Comment 1 Jonas Oreland 2005-09-21 01:10:29 UTC 
Created attachment 6069 [details]
dmesg and lspci
Comment 2 Shaohua 2005-09-21 01:35:14 UTC 
Created attachment 6070 [details]
patch for handling xpm_pmtmr 0 case
Comment 3 Len Brown 2005-11-30 19:17:27 UTC 
applied to acpi-test tree
Comment 4 Len Brown 2005-12-05 14:00:31 UTC 
shipped in linux-2.6.15-rc5 -- closing.