Re: 2.6.0-test4: ACPI breaks IDE/USB

[Thomas Schlichter <schlicht@uni-mannheim.de>]

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Am Sunday 24 August 2003 22:54 schrieb David van Hoose:
> Kevin P. Fleming wrote:
> > Peter Lieverdink wrote:
> >> When I enable ACPI on 2.6.0-test4 (also on 2.6.0-test3-*), the kernel no
> >> longer recognises my IDE controller and drops down to PIO mode for
> >> harddisk access. Additionally, USB devices don't get detected.
> >
> > I'm running -test4 here with ACPI and have no trouble with USB devices.
>
> I'm running test4 here with ACPI and have no USB following a call trace
> with "IRQ 20: nobody cared". ACPI seems to make odd reports. I've been
> having this problem since 2.5.70'ish. Posted numerous times, but nobody
> seems to care about it. I also have a PS/2 mouse detection when I have
> no mice attached to my system.
>
> >> The system is an Athlon 2400+ on a Gibabyte GA-7VAXP mainboard. (KT400)
> >
> > My system is an Athlon 1000 on an MSI KT266-based board.
>
> I have a Pentium 4 2.53 GHz on a Asus P4S8X mainboard.
>
> -David
>
> PS. dmesg is attached with ACPI debug and USB debug enabled.

I had similar problems with my Epox 8K9A (KT400) Board.

If I wanted to use my USB ports I had to boot wiht 'acpi=off'. But with the 
patch attached it is possible for me to boot with 'pci=noacpi'. It has the 
advantage that ACPI stays enabled...

You are free to give it a try...

  Thomas

[-- Attachment #2: fix_noacpi.diff --]
[-- Type: text/x-diff, Size: 1461 bytes --]

--- linux-2.6.0-test4/arch/i386/kernel/acpi/boot.c.orig	Sat Aug 23 01:59:02 2003
+++ linux-2.6.0-test4/arch/i386/kernel/acpi/boot.c	Sat Aug 23 16:39:57 2003
@@ -41,6 +41,7 @@
 #define PREFIX			"ACPI: "
 
 extern int acpi_disabled;
+extern int acpi_irq;
 extern int acpi_ht;
 
 int acpi_lapic = 0;
@@ -407,7 +408,7 @@
 	 * If MPS is present, it will handle them,
 	 * otherwise the system will stay in PIC mode
 	 */
-	if (acpi_disabled) {
+	if (acpi_disabled || !acpi_irq) {
 		return 1;
         }
 
@@ -450,14 +451,13 @@
 	acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 
 	acpi_ioapic = 1;
-#endif /*CONFIG_X86_IO_APIC*/
 
 #ifdef CONFIG_X86_LOCAL_APIC
-	if (acpi_lapic && acpi_ioapic) {
-		smp_found_config = 1;
-		clustered_apic_check();
-	}
+	smp_found_config = 1;
+	clustered_apic_check();
 #endif
+
+#endif /*CONFIG_X86_IO_APIC*/
 
 	return 0;
 }
--- linux-2.6.0-test4/arch/i386/kernel/setup.c.orig	Sat Aug 23 01:55:38 2003
+++ linux-2.6.0-test4/arch/i386/kernel/setup.c	Sat Aug 23 16:34:21 2003
@@ -71,6 +71,7 @@
 EXPORT_SYMBOL(acpi_disabled);
 
 #ifdef	CONFIG_ACPI_BOOT
+	int acpi_irq __initdata = 1;	/* enable IRQ */
 	int acpi_ht __initdata = 1;	/* enable HT */
 #endif
 
@@ -542,6 +543,11 @@
 		else if (!memcmp(from, "acpi=ht", 7)) {
 			acpi_ht = 1;
 			if (!acpi_force) acpi_disabled = 1;
+		}
+
+		/* "pci=noacpi" disables ACPI interrupt routing */
+		else if (!memcmp(from, "pci=noacpi", 10)) {
+			acpi_irq = 0;
 		}
 
 #ifdef CONFIG_X86_LOCAL_APIC