Messages in this thread | | | Date | Wed, 7 Jul 1999 16:40:50 -0700 (PDT) | From | Linux Lists <> | Subject | SMP (IO-APIC??) weirdness |
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Hello,
Two cases:
(1) Dell PowerEdge 1300, Dual P-II/400, 64MB RAM (local system). Cyclom-8Yo ISA card (a multiport serial card). Cyclades driver 2.2.2.3_SMP_2 (experimental).
In this case, the Cyclom-Y card works just fine, being able to communicate with the standard serial port.
(2) Dell PowerEdge 2300, Dual P-II/400, 256MB RAM (client system). Cyclom-8Yo ISA card. Cyclades driver 2.2.2.3_SMP_2 (experimental).
In this case, /proc/interrupts does not see any interrupts being generated by the Cyclom-Y card, even though the IRQ is registered by the driver (i.e., it's listed in /proc/interrupts, yet with '0' interrrupts generated).
If kernel is compiled as UP, the Cyclom-Y works fine, using the _same_ IRQ that it tried to use on the SMP kernel.
I'm suspecting of a hardware issue here (something related to the IO-APIC and the Cyclades ISA card, or something in this line), but I'm not sure.
Comments ?? Hints ?? Suggestions ??
Any help would be appreciated.
Regards, Ivan Passos
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