Re: interrupts run crazy on 2.6.28+

[Ben Gamari <bgamari gmail com>]

This actually sounds vaguely like an i915 bug that we thought was
fixed but may still be ailing some people. For some reason the GPU
goes crazy asserting interrupts. It seems that MSI might fix the issue
although I think MSI is still universally disabled in Rawhide. It
seems strange that you aren't seeing slow rendering as well, however.
The bug is #466575
(https://bugzilla.redhat.com/show_bug.cgi?id=466575).

- Ben


On Thu, Jan 22, 2009 at 7:15 PM, Chuck Anderson <cra wpi edu> wrote:
> My Lenovo T61 occasionally goes crazy with interrupts under kernels >=
> 2.6.28.  powertop shows the situation clearly:
>
> Top causes for wakeups:
>  99.4% (64644.0)       <interrupt> : ahci, uhci_hcd:usb5, yenta,
> i915 pci:0000:00:02.0
>
> How does one tell which device is causing all these interrupts?
>
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