Loosing network connection

[Brin Horooribn]

I have RedHat 7.1 loaded on an HP VL6 300 7DT.
The PC has 2 PCI devices plugged in an ethnet card and Video card plus a USB on the main board. All devices get loaded and everything works at first. Afeter some time my network connection drops and I have the following message first showing eth0 up that down

[root@adlcks log]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:10:5A:9B:A9:01
inet addr:142.113.77.251 Bcast:142.113.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5899 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
Interrupt:11 Base address:0xfc00

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0

[root@adlcks log]# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0

In the file /var/log/messages I get

Nov 15 04:31:27 adlcks ifup: SIOCSIFFLAGS: No such device
Nov 15 04:31:27 adlcks ifup: SIOCADDRT: Network is down
Nov 15 04:31:27 adlcks ifup: SIOCADDRT: Network is unreachable

Checking the file

[root@adlcks /proc]# cat pci
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Intel Corporation 440LX/EX - 82443LX/EX Host bridge (rev 3).
Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xe0000000 [0xefffffff].
Bus 0, device 1, function 0:
PCI bridge: Intel Corporation 440LX/EX - 82443LX/EX AGP bridge (rev 3).
Master Capable. Latency=64. Min Gnt=4.
Bus 0, device 4, function 0:
ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 1).
Bus 0, device 4, function 1:
IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 1).
Master Capable. Latency=64.
I/O at 0xfcf0 [0xfcff].
Bus 0, device 4, function 2:
USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 1).
IRQ 11.
Master Capable. Latency=64.
I/O at 0xfcc0 [0xfcdf].
Bus 0, device 4, function 3:
Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 1).
IRQ 9.
Bus 0, device 10, function 0:
VGA compatible controller: Matrox Graphics, Inc. MGA 2164W [Millennium II] (rev 0).
IRQ 9.
Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xfd000000 [0xfdffffff].
Non-prefetchable 32 bit memory at 0xfedfc000 [0xfedfffff].
Non-prefetchable 32 bit memory at 0xfe0000

I think my problem is with the IRQ assignments but not sure. If it is how do I change them?

Thanks

[Marcin Golembski_1]

Things to try:
- make sure non-PnP OS is set in the BIOS
- try disabling power management
- if your card is 3COM that uses 3c59x driver you might consider changing the card - some say the 3c95x driver is buggy...

[Brin Horooribn]

Thanks The problem turned out to be power management...How embarrassing!!