[LAU] Disabling IRQ #19

[Ralf Mardorf]

On Tue, 2014-06-17 at 20:49 +0200, Markus Seeber wrote:
> On 06/17/2014 08:06 PM, Peter P. wrote:
> > I have no way to set/change the IRQ assignments in this BIOS.
> > Interrupt 19 is shared by modules ehci_hcd:usb2, ips, snd_hdsp,
> > where the two others are USB and the thermal subsystem.
> > I assume ehci_hcd:usb2 denotes the second USB bus. If this is correct,
> > there are no devices connected to it at the moment, according to lsusb
> > (except for USB hubs).

> You are not alone with this issue,
> I tried to work around this on different hardware by turning off the
> devices that share the IRQ in BIOS.

It's also possible to unbind devices by command line. On my machine the
BIOS is useless too.

Assumed the links mentioned in my script are still available, one of the
scripts describes how to unbind a device.

[rocketmouse at archlinux ~]$ cat /usr/local/sbin/tuning
#!/bin/bash

[snip]

### http://www.mythtv.org/wiki/PCI_Latency
### http://wiki.linuxmusicians.com/doku.php?id=system_configuration#pci_bus_latency

[snip]

### Unbinding devices
echo -n "0000:00:13.2" > /sys/bus/pci/drivers/ohci_hcd/unbind
echo -n "0000:00:13.4" > /sys/bus/pci/drivers/ohci_hcd/unbind

[snip]

exit 0