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SubjectRe: 2.6.0-test4: ACPI breaks IDE/USB
Hi Thomas,

Your patch works beautifully. 'acpi=nopci' previously caused IDE to work
fine, but made the kernel not detect USB and network devices. With your
patch it sees all peripherals AND acpi is available for the cpu. I wonder
if it would be accepted into the kernel as a patch to workaround buggy acpi
bioses.

Thanks heaps!

- Peter.
--
At 23:44 24/08/2003 +0200, you wrote:
>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
>--- 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

-
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