I investigated this further from a hardware perspective (it's been awhile
since I built this pc), and the front USB ports are attached to the case,
with a cable running to the motherboard. I unplugged the cable from the
motherboard and checked that everything was all lined up properly, then
plugged them back in.
I just tried the front USB ports again today, and this time they worked just
as smoothly as the back ones. I guess I must have had a cable slightly loose
or something -- which is weird because my /var/log/messages file kept showing
the system attempting to mount the device, but just not being able to assign
an address. Maybe it was just one pin that was off a little.
As one last piece of information, my /proc/interrupts file shows dedicated
addresses now for everything -- nothing compounded on one address.
CPU0
0: 1558368 XT-PIC timer
1: 3902 XT-PIC i8042
2: 0 XT-PIC cascade
3: 5021 XT-PIC uhci_hcd
8: 2 XT-PIC rtc
9: 0 XT-PIC uhci_hcd
10: 56 XT-PIC Ensoniq AudioPCI
11: 94843 XT-PIC [EMAIL PROTECTED]:1:0:0
12: 57818 XT-PIC i8042
14: 32126 XT-PIC ide0
15: 20435 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
Thanks to everyone who helped me troubleshoot this issue. I've learned a lot
more about using USB under linux.
Cheers and Happy New Year!
Charles
On Saturday 11 December 2004 10:56 am, Stephen J. Gowdy wrote:
> So you either have a BIOS or PCI problem. You might want to ask about it
> on linux-kernel.
>
> For disabling acpi, you should be able to pass the "noacpi" boot option to
> the kernel.
>
> On Sat, 11 Dec 2004, cmire wrote:
> > O.k. -- I tried that and got some results. I think I'm starting to get
> > this now. The /proc/interrupts shown below in the thread has both of my
> > USB hubs and my ethernet card on IRQ 11 -- and it appears eth0 was given
> > priority, so USB couldn't be accessed at all.
> >
> > I removed the ethernet card and uninstalled it via YAST2; I also disabled
> > the second COM port (not using it, either) through the BIOS. Now
> > my /proc/interrupts shows this:
> >
> > CPU0
> > 0: 514522 XT-PIC timer
> > 1: 260 XT-PIC i8042
> > 2: 0 XT-PIC cascade
> > 3: 0 XT-PIC uhci_hcd
> > 8: 2 XT-PIC rtc
> > 9: 0 XT-PIC acpi, uhci_hcd
> > 10: 56 XT-PIC Ensoniq AudioPCI
> > 11: 27268 XT-PIC [EMAIL PROTECTED]:1:0:0
> > 12: 23534 XT-PIC i8042
> > 14: 16161 XT-PIC ide0
> > 15: 5566 XT-PIC ide1
> > NMI: 0
> > LOC: 0
> > ERR: 0
> > MIS: 0
> >
> >
> > When I plug in my PNY device to the USB ports on the back of my pc -- it
> > works like a charm! Auto everything -- couldn't be easier to use.
> >
> > When I try to plug it into the front USB ports, I get the same "not
> > accepting address" error. Based on the results and the /proc/interrupts,
> > I believe it's that pesky acpi unit hogging IRQ 9.
> >
> > I have looked over my BIOS settings for ACPI, and there appears to be no
> > way to just disable it altogether -- my menu choices do not include
> > anything like a global ACPI disable setting. I disabled everything I
> > could in the BIOS for ACPI. I also edited my /boot/config file and set
> > every acpi kernel parameter to "n" and rebooted. None of these changes
> > has affected the interrupts.
> >
> > Other than experimenting with manually setting the IRQs -- any ideas that
> > will let me end up with usage of both front and back USB hubs? Or would
> > it be easier for me to just buy a 4-port external USB hub and plug it
> > into the back?
> >
> > Also, what could I do to get more interrupts -- or is this a hardware
> > legacy issue and there is no way to expand the range of IRQs?
> >
> > Thanks,
> > Charles
> >
> > On Monday 06 December 2004 12:56 am, Stephen J. Gowdy wrote:
> > > Can you try running without your ethernet card active too?
> > >
> > > On Sun, 5 Dec 2004, cmire wrote:
> > > > Here's the result from cat /proc/interrupts. It's slightly different
> > > > than the one below, because I now have the sound card built into the
> > > > motherboard disabled via the BIOS (I thought maybe freeing up that
> > > > IRQ might help, but no) -- so IRQ 11 no longer has the Ensoniq Audio
> > > > listed (it's only listed on 9, no change from previous).
> > > >
> > > > CPU0
> > > > 0: 7807309 XT-PIC timer
> > > > 1: 324 XT-PIC i8042
> > > > 2: 0 XT-PIC cascade
> > > > 4: 6665 XT-PIC serial
> > > > 8: 2 XT-PIC rtc
> > > > 9: 125 XT-PIC acpi, Ensoniq AudioPCI
> > > > 10: 633726 XT-PIC [EMAIL PROTECTED]:1:0:0
> > > > 11: 7875 XT-PIC eth0, uhci_hcd, uhci_hcd
> > > > 12: 12782 XT-PIC i8042
> > > > 14: 24063 XT-PIC ide0
> > > > 15: 114410 XT-PIC ide1
> > > > NMI: 0
> > > > LOC: 0
> > > > ERR: 0
> > > > MIS: 0
>
> --
> /------------------------------------+-------------------------\
>
> |Stephen J. Gowdy | SLAC, MailStop 34, |
> |http://www.slac.stanford.edu/~gowdy/ | 2575 Sand Hill Road, |
> |http://calendar.yahoo.com/gowdy | Menlo Park CA 94025, USA |
> |EMail: [EMAIL PROTECTED] | Tel: +1 650 926 3144 |
>
> \------------------------------------+-------------------------/
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