Messages in this thread | | | Date | Wed, 5 Nov 2003 15:42:38 +0100 | From | Mikael Pettersson <> | Subject | Re: ide-scsi and SMP does not work together. |
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Klaus Umbach writes: > Hello Support Center :-) > > Since I have 2 CPUs on my mainboard and compiled the SMP-support in, I > cannot use ide-scsi anymore. I guess it must have something to do with > apic, because when I use "Local APIC support on uniprocessors", I have > the same problem. With no SMP and no local APIC everything works fine. > (except the second CPU, of course). Normal ide-cdrom support works, but > recording CDs over atapi is not really what I want at the moment. > > Mainboard: MSI 694D pro > > 00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 10)
SMP by default uses the I/O-APIC, and may (depending on kernel version and .config) also use ACPI, which in turn may trigger ACPI-controlled PCI IRQ routing.
Try "acpi=off", "pci=noacpi" (or however that don't-use-ACPI-for-PCI option is spelled), and "noapic" (don't use I/O-APIC).
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