[LAU] buying a new laptop

david gnome at hawaii.rr.com
Fri Sep 9 06:50:10 UTC 2011

Device IRQs might be set is in the actual hardware itself. The 
manufacturer might have hardwired that device (such as a USB or Firewire 
controller) to a particular hardware IRQ line.

Device itself might be designed to require a particular IRQ. Don't know 
if that's true anymore, used to be in the days of the E/ISA buses.

I don't think software can do anything about those situations.

BIOS might have option to change IRQs.

Diego Simak wrote:
> Yes, that page is for set the priorities of IRQ handlers, not the IRQ to 
> a certain device.
> If you find how to do that let us know.
> Thank you!
> Diego
> 2011/9/8 andy baxter 
>     On 08/09/11 11:49, Diego Simak wrote:
>         http://subversion.ffado.org/ wiki/IrqPriorities
>         <http://subversion.ffado.org/wiki/IrqPriorities>
>     That link is good for setting the priorities of irq handlers, but
>     doesn't tell you how to move a device to a different irq, which is
>     what I'd really like.
>     I just had another look at the onboard firmware config system, and
>     it does have a page that lets you assign devices labelled A,B,C...
>     to different physical interrupts, but I'm not sure how to use this
>     properly or safely. (There's no indication what device 'A' actually
>     is). By default they are all set to INT 11, which doesn't come up in
>     /proc/interrupts.
>     andy
>         2011/9/8 Atte André Jensen <atte at email.dk <mailto:atte at email.dk>
>         <mailto:atte at email.dk <mailto:atte at email.dk>>>
>            On 09/08/2011 11:15 AM, andy baxter wrote:
>                If you work out how to change it, please let me know, as it
>                annoys me too!
>            Sure!
>            I've been using stock kernels for a while now, but is it true
>         that
>            this is only relevant when running a rt-patched kernel *and*
>            setting up rt-priorities for IRQ's?
>            In any case, where do I find a quick (re-)intro to how to
>         tune the
>            IRQ's?

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