Sound, RS-232 serial fails on dell latitute D620 notebook...

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This is probably a Dell problem, but I'm hoping someone on the list has
seen similar behavior before.

Sound input and RS232 serial input do not function on a Dell Latitude D620.

Details:
- Fedora Core 5 installation, running vanilla kernel.org 2.6.16.16 and 2.6.18, results are identical. Sound input times out with an I/O error, no serial input characters are ever seen. I've tried with and without acpi, apic, and irqpoll, and see no different results.

- lspci:
00:00.0 Host bridge: Intel Corporation Mobile Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile Integrated Graphics Controller (rev 03) 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01) 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01) 00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 01) 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01) 00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controllers cc=IDE (rev 01) 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01) 03:01.0 CardBus bridge: O2 Micro, Inc. OZ601/6912/711E0 CardBus/SmartCardBus Controller (rev 40) 09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5752 Gigabit Ethernet PCI Express (rev 02)

-# cat /proc/interrupts
          CPU0       CPU1
 0:     122071     115893    IO-APIC-edge  timer
 1:        279        303    IO-APIC-edge  i8042
 4:         11          0    IO-APIC-edge  serial
 8:          1          0    IO-APIC-edge  rtc
 9:          0          3   IO-APIC-level  acpi
12:       1945       2177    IO-APIC-edge  i8042
14:       5400       1996    IO-APIC-edge  libata
15:       4172       4023    IO-APIC-edge  ide1
17:       1427          0   IO-APIC-level  yenta, eth0
19:        207          0   IO-APIC-level  uhci_hcd:usb1, ehci_hcd:usb5
20:       4247       4295   IO-APIC-level  uhci_hcd:usb2, HDA Intel
21:       1238        957   IO-APIC-level  uhci_hcd:usb3
22:          0          0   IO-APIC-level  uhci_hcd:usb4
NMI:          0          0
LOC:     237898     237897
ERR:          0
MIS:          0


Can anyone point me in some general direction? I have no problem hacking around in
kernel source, but a good start never hurts :-)

Thanks for any assistance.


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