spurious interrupts from switched off devices
- Hi everybody,
I have problems with my I5000e, sending interrupts to my linux-system
(currently SuSE 7.2 but the
same happend with earlier versions) from devices which are not present or
switched off in the BIOS.
I then find a lot "kernel: spurious IRQ XXX sent"
Namely there are two devices which seems to send such interrupts:
the LPT-port is sending always IRQ7, also when switched off in the BIOS.
Although I don't use the LPT-port, I worked around this problem by always
switching the device on
in the BIOS and then always loading the parallelport-modules with
parameter in etc/modules.conf telling
the kernel, that it is using IRQ7.
The second devices that sends always interrupts is the second IDE
controller. I often replace my
DVD-ROM with a second battery pack and then I can find a lot of such
"spurious interrupt 15"
Is this behaviour normal ? Or is it a BIOS bug ?
Is it possible to tell the linux kernel about devices, which are not used but
will send interrupts without
loading the modules and therefore use memory resources ?
Do this messages have any sideeffect or can they be safely ignored ?