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

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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