[sane-devel] Re: IRQ conflict between Fujitsu fi-4120c and NIC

[Henning Meier-Geinitz]

Hi,

On Sun, Apr 06, 2003 at 05:46:54PM -0500, CHEN wrote:
> Since I do not know how to send plain text via hotmail, I am now using
> this email account.

Much better :-)

> I added 'usb /dev/usb/scanner0' to fujitsu.conf, and it works now. I could
> use scanimage to scan, but I could not use xsane, it prompted 'no device',
> and did not show the select device dialog, I guess that might be xsane's
> configuration problem?

No. Most probably you installed sane from source code and didn't
remove the already existing sane. Please read the sane-devel archive,
this is discussed quite often.

> Another problem is there is a IRQ conflict between fi-4120c and my NIC,

I guess the IRQ is between the USB controller and the NIC?

> here is the error log:
> eth0: transmit timed out, tx_status 00 status e601
> diagnostics:net 0cd8 media 8880 dma 0000003a.
> eth0: Interrupt posted but not delivered -- IRQ blocked by another device?
> 
> This is the error log when I tried to ping another Windows machine I used
> to be able to ping.

Are you sure that this is related to your scanner at all? Does it
happen if you use other USB devices?

> Then I reboot the Linux machine, Redhat automatically removed the NIC
> configuration, so I lost the network connection to my Windows machine. 

RedHat removed the NIC configuration because the driver claimed to see
an interrupt blocking? Are you sure? Better ask the RedHat support
about this.

Check the BIOS settings. If automatic configuration of IRQs doesn't
work, set them manually so the USB and NIC don't conflict. Maybe it's
laso a problem of the APIC support. IIRC correctly, there is a kernel
option called "noapic" or similar. Check google.

Bye,
  Henning